зеркало из https://github.com/microsoft/clang-1.git
2045 строки
72 KiB
C++
2045 строки
72 KiB
C++
//===--- ParseDecl.cpp - Declaration Parsing ------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the Declaration portions of the Parser interfaces.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/Parse/Parser.h"
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#include "clang/Basic/Diagnostic.h"
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#include "clang/Parse/Scope.h"
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#include "ExtensionRAIIObject.h"
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#include "AstGuard.h"
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#include "llvm/ADT/SmallSet.h"
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using namespace clang;
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//===----------------------------------------------------------------------===//
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// C99 6.7: Declarations.
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//===----------------------------------------------------------------------===//
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/// ParseTypeName
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/// type-name: [C99 6.7.6]
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/// specifier-qualifier-list abstract-declarator[opt]
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///
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/// Called type-id in C++.
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Parser::TypeTy *Parser::ParseTypeName() {
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// Parse the common declaration-specifiers piece.
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DeclSpec DS;
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ParseSpecifierQualifierList(DS);
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// Parse the abstract-declarator, if present.
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Declarator DeclaratorInfo(DS, Declarator::TypeNameContext);
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ParseDeclarator(DeclaratorInfo);
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return Actions.ActOnTypeName(CurScope, DeclaratorInfo).Val;
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}
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/// ParseAttributes - Parse a non-empty attributes list.
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///
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/// [GNU] attributes:
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/// attribute
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/// attributes attribute
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///
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/// [GNU] attribute:
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/// '__attribute__' '(' '(' attribute-list ')' ')'
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///
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/// [GNU] attribute-list:
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/// attrib
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/// attribute_list ',' attrib
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///
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/// [GNU] attrib:
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/// empty
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/// attrib-name
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/// attrib-name '(' identifier ')'
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/// attrib-name '(' identifier ',' nonempty-expr-list ')'
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/// attrib-name '(' argument-expression-list [C99 6.5.2] ')'
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///
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/// [GNU] attrib-name:
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/// identifier
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/// typespec
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/// typequal
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/// storageclass
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///
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/// FIXME: The GCC grammar/code for this construct implies we need two
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/// token lookahead. Comment from gcc: "If they start with an identifier
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/// which is followed by a comma or close parenthesis, then the arguments
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/// start with that identifier; otherwise they are an expression list."
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///
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/// At the moment, I am not doing 2 token lookahead. I am also unaware of
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/// any attributes that don't work (based on my limited testing). Most
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/// attributes are very simple in practice. Until we find a bug, I don't see
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/// a pressing need to implement the 2 token lookahead.
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AttributeList *Parser::ParseAttributes() {
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assert(Tok.is(tok::kw___attribute) && "Not an attribute list!");
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AttributeList *CurrAttr = 0;
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while (Tok.is(tok::kw___attribute)) {
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ConsumeToken();
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if (ExpectAndConsume(tok::l_paren, diag::err_expected_lparen_after,
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"attribute")) {
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SkipUntil(tok::r_paren, true); // skip until ) or ;
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return CurrAttr;
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}
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if (ExpectAndConsume(tok::l_paren, diag::err_expected_lparen_after, "(")) {
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SkipUntil(tok::r_paren, true); // skip until ) or ;
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return CurrAttr;
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}
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// Parse the attribute-list. e.g. __attribute__(( weak, alias("__f") ))
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while (Tok.is(tok::identifier) || isDeclarationSpecifier() ||
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Tok.is(tok::comma)) {
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if (Tok.is(tok::comma)) {
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// allows for empty/non-empty attributes. ((__vector_size__(16),,,,))
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ConsumeToken();
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continue;
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}
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// we have an identifier or declaration specifier (const, int, etc.)
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IdentifierInfo *AttrName = Tok.getIdentifierInfo();
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SourceLocation AttrNameLoc = ConsumeToken();
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// check if we have a "paramterized" attribute
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if (Tok.is(tok::l_paren)) {
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ConsumeParen(); // ignore the left paren loc for now
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if (Tok.is(tok::identifier)) {
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IdentifierInfo *ParmName = Tok.getIdentifierInfo();
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SourceLocation ParmLoc = ConsumeToken();
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if (Tok.is(tok::r_paren)) {
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// __attribute__(( mode(byte) ))
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ConsumeParen(); // ignore the right paren loc for now
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CurrAttr = new AttributeList(AttrName, AttrNameLoc,
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ParmName, ParmLoc, 0, 0, CurrAttr);
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} else if (Tok.is(tok::comma)) {
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ConsumeToken();
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// __attribute__(( format(printf, 1, 2) ))
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ExprVector ArgExprs(Actions);
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bool ArgExprsOk = true;
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// now parse the non-empty comma separated list of expressions
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while (1) {
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OwningExprResult ArgExpr(Actions, ParseAssignmentExpression());
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if (ArgExpr.isInvalid()) {
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ArgExprsOk = false;
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SkipUntil(tok::r_paren);
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break;
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} else {
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ArgExprs.push_back(ArgExpr.release());
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}
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if (Tok.isNot(tok::comma))
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break;
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ConsumeToken(); // Eat the comma, move to the next argument
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}
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if (ArgExprsOk && Tok.is(tok::r_paren)) {
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ConsumeParen(); // ignore the right paren loc for now
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CurrAttr = new AttributeList(AttrName, AttrNameLoc, ParmName,
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ParmLoc, ArgExprs.take(), ArgExprs.size(), CurrAttr);
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}
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}
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} else { // not an identifier
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// parse a possibly empty comma separated list of expressions
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if (Tok.is(tok::r_paren)) {
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// __attribute__(( nonnull() ))
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ConsumeParen(); // ignore the right paren loc for now
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CurrAttr = new AttributeList(AttrName, AttrNameLoc,
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0, SourceLocation(), 0, 0, CurrAttr);
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} else {
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// __attribute__(( aligned(16) ))
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ExprVector ArgExprs(Actions);
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bool ArgExprsOk = true;
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// now parse the list of expressions
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while (1) {
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OwningExprResult ArgExpr(Actions, ParseAssignmentExpression());
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if (ArgExpr.isInvalid()) {
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ArgExprsOk = false;
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SkipUntil(tok::r_paren);
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break;
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} else {
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ArgExprs.push_back(ArgExpr.release());
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}
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if (Tok.isNot(tok::comma))
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break;
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ConsumeToken(); // Eat the comma, move to the next argument
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}
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// Match the ')'.
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if (ArgExprsOk && Tok.is(tok::r_paren)) {
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ConsumeParen(); // ignore the right paren loc for now
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CurrAttr = new AttributeList(AttrName, AttrNameLoc, 0,
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SourceLocation(), ArgExprs.take(), ArgExprs.size(),
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CurrAttr);
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}
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}
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}
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} else {
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CurrAttr = new AttributeList(AttrName, AttrNameLoc,
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0, SourceLocation(), 0, 0, CurrAttr);
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}
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}
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if (ExpectAndConsume(tok::r_paren, diag::err_expected_rparen))
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SkipUntil(tok::r_paren, false);
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if (ExpectAndConsume(tok::r_paren, diag::err_expected_rparen))
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SkipUntil(tok::r_paren, false);
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}
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return CurrAttr;
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}
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/// ParseDeclaration - Parse a full 'declaration', which consists of
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/// declaration-specifiers, some number of declarators, and a semicolon.
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/// 'Context' should be a Declarator::TheContext value.
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///
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/// declaration: [C99 6.7]
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/// block-declaration ->
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/// simple-declaration
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/// others [FIXME]
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/// [C++] template-declaration
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/// [C++] namespace-definition
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/// others... [FIXME]
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///
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Parser::DeclTy *Parser::ParseDeclaration(unsigned Context) {
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switch (Tok.getKind()) {
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case tok::kw_export:
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case tok::kw_template:
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return ParseTemplateDeclaration(Context);
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case tok::kw_namespace:
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return ParseNamespace(Context);
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default:
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return ParseSimpleDeclaration(Context);
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}
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}
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/// simple-declaration: [C99 6.7: declaration] [C++ 7p1: dcl.dcl]
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/// declaration-specifiers init-declarator-list[opt] ';'
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///[C90/C++]init-declarator-list ';' [TODO]
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/// [OMP] threadprivate-directive [TODO]
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Parser::DeclTy *Parser::ParseSimpleDeclaration(unsigned Context) {
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// Parse the common declaration-specifiers piece.
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DeclSpec DS;
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ParseDeclarationSpecifiers(DS);
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// C99 6.7.2.3p6: Handle "struct-or-union identifier;", "enum { X };"
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// declaration-specifiers init-declarator-list[opt] ';'
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if (Tok.is(tok::semi)) {
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ConsumeToken();
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return Actions.ParsedFreeStandingDeclSpec(CurScope, DS);
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}
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Declarator DeclaratorInfo(DS, (Declarator::TheContext)Context);
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ParseDeclarator(DeclaratorInfo);
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return ParseInitDeclaratorListAfterFirstDeclarator(DeclaratorInfo);
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}
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/// ParseInitDeclaratorListAfterFirstDeclarator - Parse 'declaration' after
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/// parsing 'declaration-specifiers declarator'. This method is split out this
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/// way to handle the ambiguity between top-level function-definitions and
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/// declarations.
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///
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/// init-declarator-list: [C99 6.7]
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/// init-declarator
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/// init-declarator-list ',' init-declarator
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/// init-declarator: [C99 6.7]
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/// declarator
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/// declarator '=' initializer
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/// [GNU] declarator simple-asm-expr[opt] attributes[opt]
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/// [GNU] declarator simple-asm-expr[opt] attributes[opt] '=' initializer
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/// [C++] declarator initializer[opt]
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///
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/// [C++] initializer:
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/// [C++] '=' initializer-clause
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/// [C++] '(' expression-list ')'
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///
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Parser::DeclTy *Parser::
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ParseInitDeclaratorListAfterFirstDeclarator(Declarator &D) {
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// Declarators may be grouped together ("int X, *Y, Z();"). Provide info so
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// that they can be chained properly if the actions want this.
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Parser::DeclTy *LastDeclInGroup = 0;
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// At this point, we know that it is not a function definition. Parse the
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// rest of the init-declarator-list.
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while (1) {
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// If a simple-asm-expr is present, parse it.
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if (Tok.is(tok::kw_asm)) {
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OwningExprResult AsmLabel(ParseSimpleAsm());
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if (AsmLabel.isInvalid()) {
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SkipUntil(tok::semi);
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return 0;
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}
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D.setAsmLabel(AsmLabel.release());
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}
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// If attributes are present, parse them.
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if (Tok.is(tok::kw___attribute))
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D.AddAttributes(ParseAttributes());
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// Inform the current actions module that we just parsed this declarator.
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LastDeclInGroup = Actions.ActOnDeclarator(CurScope, D, LastDeclInGroup);
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// Parse declarator '=' initializer.
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if (Tok.is(tok::equal)) {
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ConsumeToken();
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OwningExprResult Init(Actions, ParseInitializer());
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if (Init.isInvalid()) {
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SkipUntil(tok::semi);
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return 0;
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}
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Actions.AddInitializerToDecl(LastDeclInGroup, Init.release());
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} else if (Tok.is(tok::l_paren)) {
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// Parse C++ direct initializer: '(' expression-list ')'
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SourceLocation LParenLoc = ConsumeParen();
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ExprVector Exprs(Actions);
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CommaLocsTy CommaLocs;
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bool InvalidExpr = false;
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if (ParseExpressionList(Exprs, CommaLocs)) {
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SkipUntil(tok::r_paren);
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InvalidExpr = true;
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}
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// Match the ')'.
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SourceLocation RParenLoc = MatchRHSPunctuation(tok::r_paren, LParenLoc);
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if (!InvalidExpr) {
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assert(!Exprs.empty() && Exprs.size()-1 == CommaLocs.size() &&
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"Unexpected number of commas!");
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Actions.AddCXXDirectInitializerToDecl(LastDeclInGroup, LParenLoc,
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Exprs.take(), Exprs.size(),
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&CommaLocs[0], RParenLoc);
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}
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} else {
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Actions.ActOnUninitializedDecl(LastDeclInGroup);
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}
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// If we don't have a comma, it is either the end of the list (a ';') or an
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// error, bail out.
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if (Tok.isNot(tok::comma))
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break;
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// Consume the comma.
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ConsumeToken();
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// Parse the next declarator.
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D.clear();
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// Accept attributes in an init-declarator. In the first declarator in a
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// declaration, these would be part of the declspec. In subsequent
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// declarators, they become part of the declarator itself, so that they
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// don't apply to declarators after *this* one. Examples:
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// short __attribute__((common)) var; -> declspec
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// short var __attribute__((common)); -> declarator
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// short x, __attribute__((common)) var; -> declarator
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if (Tok.is(tok::kw___attribute))
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D.AddAttributes(ParseAttributes());
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ParseDeclarator(D);
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}
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if (Tok.is(tok::semi)) {
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ConsumeToken();
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return Actions.FinalizeDeclaratorGroup(CurScope, LastDeclInGroup);
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}
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// If this is an ObjC2 for-each loop, this is a successful declarator
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// parse. The syntax for these looks like:
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// 'for' '(' declaration 'in' expr ')' statement
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if (D.getContext() == Declarator::ForContext && isTokIdentifier_in()) {
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return Actions.FinalizeDeclaratorGroup(CurScope, LastDeclInGroup);
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}
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Diag(Tok, diag::err_parse_error);
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// Skip to end of block or statement
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SkipUntil(tok::r_brace, true, true);
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if (Tok.is(tok::semi))
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ConsumeToken();
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return 0;
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}
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/// ParseSpecifierQualifierList
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/// specifier-qualifier-list:
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/// type-specifier specifier-qualifier-list[opt]
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/// type-qualifier specifier-qualifier-list[opt]
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/// [GNU] attributes specifier-qualifier-list[opt]
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///
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void Parser::ParseSpecifierQualifierList(DeclSpec &DS) {
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/// specifier-qualifier-list is a subset of declaration-specifiers. Just
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/// parse declaration-specifiers and complain about extra stuff.
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ParseDeclarationSpecifiers(DS);
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// Validate declspec for type-name.
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unsigned Specs = DS.getParsedSpecifiers();
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if (Specs == DeclSpec::PQ_None && !DS.getNumProtocolQualifiers())
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Diag(Tok, diag::err_typename_requires_specqual);
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// Issue diagnostic and remove storage class if present.
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if (Specs & DeclSpec::PQ_StorageClassSpecifier) {
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if (DS.getStorageClassSpecLoc().isValid())
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Diag(DS.getStorageClassSpecLoc(),diag::err_typename_invalid_storageclass);
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else
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Diag(DS.getThreadSpecLoc(), diag::err_typename_invalid_storageclass);
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DS.ClearStorageClassSpecs();
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}
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// Issue diagnostic and remove function specfier if present.
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if (Specs & DeclSpec::PQ_FunctionSpecifier) {
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if (DS.isInlineSpecified())
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Diag(DS.getInlineSpecLoc(), diag::err_typename_invalid_functionspec);
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if (DS.isVirtualSpecified())
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Diag(DS.getVirtualSpecLoc(), diag::err_typename_invalid_functionspec);
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if (DS.isExplicitSpecified())
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Diag(DS.getExplicitSpecLoc(), diag::err_typename_invalid_functionspec);
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DS.ClearFunctionSpecs();
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}
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}
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/// ParseDeclarationSpecifiers
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/// declaration-specifiers: [C99 6.7]
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/// storage-class-specifier declaration-specifiers[opt]
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/// type-specifier declaration-specifiers[opt]
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/// [C99] function-specifier declaration-specifiers[opt]
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/// [GNU] attributes declaration-specifiers[opt]
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///
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/// storage-class-specifier: [C99 6.7.1]
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/// 'typedef'
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/// 'extern'
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/// 'static'
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/// 'auto'
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/// 'register'
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/// [C++] 'mutable'
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/// [GNU] '__thread'
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/// function-specifier: [C99 6.7.4]
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/// [C99] 'inline'
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/// [C++] 'virtual'
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/// [C++] 'explicit'
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///
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void Parser::ParseDeclarationSpecifiers(DeclSpec &DS)
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{
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DS.SetRangeStart(Tok.getLocation());
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while (1) {
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int isInvalid = false;
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const char *PrevSpec = 0;
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SourceLocation Loc = Tok.getLocation();
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// Only annotate C++ scope. Allow class-name as an identifier in case
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// it's a constructor.
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if (getLang().CPlusPlus)
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TryAnnotateCXXScopeToken();
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switch (Tok.getKind()) {
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default:
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// Try to parse a type-specifier; if we found one, continue. If it's not
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// a type, this falls through.
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if (MaybeParseTypeSpecifier(DS, isInvalid, PrevSpec)) {
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continue;
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}
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DoneWithDeclSpec:
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// If this is not a declaration specifier token, we're done reading decl
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// specifiers. First verify that DeclSpec's are consistent.
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DS.Finish(Diags, PP.getSourceManager(), getLang());
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return;
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case tok::annot_cxxscope: {
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if (DS.hasTypeSpecifier())
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goto DoneWithDeclSpec;
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// We are looking for a qualified typename.
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if (NextToken().isNot(tok::identifier))
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goto DoneWithDeclSpec;
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CXXScopeSpec SS;
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SS.setScopeRep(Tok.getAnnotationValue());
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SS.setRange(Tok.getAnnotationRange());
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// If the next token is the name of the class type that the C++ scope
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// denotes, followed by a '(', then this is a constructor declaration.
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// We're done with the decl-specifiers.
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if (Actions.isCurrentClassName(*NextToken().getIdentifierInfo(),
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CurScope, &SS) &&
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GetLookAheadToken(2).is(tok::l_paren))
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goto DoneWithDeclSpec;
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TypeTy *TypeRep = Actions.isTypeName(*NextToken().getIdentifierInfo(),
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CurScope, &SS);
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if (TypeRep == 0)
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goto DoneWithDeclSpec;
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ConsumeToken(); // The C++ scope.
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isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typedef, Loc, PrevSpec,
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TypeRep);
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if (isInvalid)
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break;
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DS.SetRangeEnd(Tok.getLocation());
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ConsumeToken(); // The typename.
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continue;
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}
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// typedef-name
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case tok::identifier: {
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// This identifier can only be a typedef name if we haven't already seen
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// a type-specifier. Without this check we misparse:
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// typedef int X; struct Y { short X; }; as 'short int'.
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if (DS.hasTypeSpecifier())
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goto DoneWithDeclSpec;
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|
|
// It has to be available as a typedef too!
|
|
TypeTy *TypeRep = Actions.isTypeName(*Tok.getIdentifierInfo(), CurScope);
|
|
if (TypeRep == 0)
|
|
goto DoneWithDeclSpec;
|
|
|
|
// C++: If the identifier is actually the name of the class type
|
|
// being defined and the next token is a '(', then this is a
|
|
// constructor declaration. We're done with the decl-specifiers
|
|
// and will treat this token as an identifier.
|
|
if (getLang().CPlusPlus &&
|
|
CurScope->isCXXClassScope() &&
|
|
Actions.isCurrentClassName(*Tok.getIdentifierInfo(), CurScope) &&
|
|
NextToken().getKind() == tok::l_paren)
|
|
goto DoneWithDeclSpec;
|
|
|
|
isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typedef, Loc, PrevSpec,
|
|
TypeRep);
|
|
if (isInvalid)
|
|
break;
|
|
|
|
DS.SetRangeEnd(Tok.getLocation());
|
|
ConsumeToken(); // The identifier
|
|
|
|
// Objective-C supports syntax of the form 'id<proto1,proto2>' where 'id'
|
|
// is a specific typedef and 'itf<proto1,proto2>' where 'itf' is an
|
|
// Objective-C interface. If we don't have Objective-C or a '<', this is
|
|
// just a normal reference to a typedef name.
|
|
if (!Tok.is(tok::less) || !getLang().ObjC1)
|
|
continue;
|
|
|
|
SourceLocation EndProtoLoc;
|
|
llvm::SmallVector<DeclTy *, 8> ProtocolDecl;
|
|
ParseObjCProtocolReferences(ProtocolDecl, false, EndProtoLoc);
|
|
DS.setProtocolQualifiers(&ProtocolDecl[0], ProtocolDecl.size());
|
|
|
|
DS.SetRangeEnd(EndProtoLoc);
|
|
|
|
// Need to support trailing type qualifiers (e.g. "id<p> const").
|
|
// If a type specifier follows, it will be diagnosed elsewhere.
|
|
continue;
|
|
}
|
|
// GNU attributes support.
|
|
case tok::kw___attribute:
|
|
DS.AddAttributes(ParseAttributes());
|
|
continue;
|
|
|
|
// storage-class-specifier
|
|
case tok::kw_typedef:
|
|
isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_typedef, Loc, PrevSpec);
|
|
break;
|
|
case tok::kw_extern:
|
|
if (DS.isThreadSpecified())
|
|
Diag(Tok, diag::ext_thread_before) << "extern";
|
|
isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_extern, Loc, PrevSpec);
|
|
break;
|
|
case tok::kw___private_extern__:
|
|
isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_private_extern, Loc,
|
|
PrevSpec);
|
|
break;
|
|
case tok::kw_static:
|
|
if (DS.isThreadSpecified())
|
|
Diag(Tok, diag::ext_thread_before) << "static";
|
|
isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_static, Loc, PrevSpec);
|
|
break;
|
|
case tok::kw_auto:
|
|
isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_auto, Loc, PrevSpec);
|
|
break;
|
|
case tok::kw_register:
|
|
isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_register, Loc, PrevSpec);
|
|
break;
|
|
case tok::kw_mutable:
|
|
isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_mutable, Loc, PrevSpec);
|
|
break;
|
|
case tok::kw___thread:
|
|
isInvalid = DS.SetStorageClassSpecThread(Loc, PrevSpec)*2;
|
|
break;
|
|
|
|
continue;
|
|
|
|
// function-specifier
|
|
case tok::kw_inline:
|
|
isInvalid = DS.SetFunctionSpecInline(Loc, PrevSpec);
|
|
break;
|
|
|
|
case tok::kw_virtual:
|
|
isInvalid = DS.SetFunctionSpecVirtual(Loc, PrevSpec);
|
|
break;
|
|
|
|
case tok::kw_explicit:
|
|
isInvalid = DS.SetFunctionSpecExplicit(Loc, PrevSpec);
|
|
break;
|
|
|
|
case tok::less:
|
|
// GCC ObjC supports types like "<SomeProtocol>" as a synonym for
|
|
// "id<SomeProtocol>". This is hopelessly old fashioned and dangerous,
|
|
// but we support it.
|
|
if (DS.hasTypeSpecifier() || !getLang().ObjC1)
|
|
goto DoneWithDeclSpec;
|
|
|
|
{
|
|
SourceLocation EndProtoLoc;
|
|
llvm::SmallVector<DeclTy *, 8> ProtocolDecl;
|
|
ParseObjCProtocolReferences(ProtocolDecl, false, EndProtoLoc);
|
|
DS.setProtocolQualifiers(&ProtocolDecl[0], ProtocolDecl.size());
|
|
DS.SetRangeEnd(EndProtoLoc);
|
|
|
|
Diag(Loc, diag::warn_objc_protocol_qualifier_missing_id)
|
|
<< SourceRange(Loc, EndProtoLoc);
|
|
// Need to support trailing type qualifiers (e.g. "id<p> const").
|
|
// If a type specifier follows, it will be diagnosed elsewhere.
|
|
continue;
|
|
}
|
|
}
|
|
// If the specifier combination wasn't legal, issue a diagnostic.
|
|
if (isInvalid) {
|
|
assert(PrevSpec && "Method did not return previous specifier!");
|
|
// Pick between error or extwarn.
|
|
unsigned DiagID = isInvalid == 1 ? diag::err_invalid_decl_spec_combination
|
|
: diag::ext_duplicate_declspec;
|
|
Diag(Tok, DiagID) << PrevSpec;
|
|
}
|
|
DS.SetRangeEnd(Tok.getLocation());
|
|
ConsumeToken();
|
|
}
|
|
}
|
|
|
|
/// MaybeParseTypeSpecifier - Try to parse a single type-specifier. We
|
|
/// primarily follow the C++ grammar with additions for C99 and GNU,
|
|
/// which together subsume the C grammar. Note that the C++
|
|
/// type-specifier also includes the C type-qualifier (for const,
|
|
/// volatile, and C99 restrict). Returns true if a type-specifier was
|
|
/// found (and parsed), false otherwise.
|
|
///
|
|
/// type-specifier: [C++ 7.1.5]
|
|
/// simple-type-specifier
|
|
/// class-specifier
|
|
/// enum-specifier
|
|
/// elaborated-type-specifier [TODO]
|
|
/// cv-qualifier
|
|
///
|
|
/// cv-qualifier: [C++ 7.1.5.1]
|
|
/// 'const'
|
|
/// 'volatile'
|
|
/// [C99] 'restrict'
|
|
///
|
|
/// simple-type-specifier: [ C++ 7.1.5.2]
|
|
/// '::'[opt] nested-name-specifier[opt] type-name [TODO]
|
|
/// '::'[opt] nested-name-specifier 'template' template-id [TODO]
|
|
/// 'char'
|
|
/// 'wchar_t'
|
|
/// 'bool'
|
|
/// 'short'
|
|
/// 'int'
|
|
/// 'long'
|
|
/// 'signed'
|
|
/// 'unsigned'
|
|
/// 'float'
|
|
/// 'double'
|
|
/// 'void'
|
|
/// [C99] '_Bool'
|
|
/// [C99] '_Complex'
|
|
/// [C99] '_Imaginary' // Removed in TC2?
|
|
/// [GNU] '_Decimal32'
|
|
/// [GNU] '_Decimal64'
|
|
/// [GNU] '_Decimal128'
|
|
/// [GNU] typeof-specifier
|
|
/// [OBJC] class-name objc-protocol-refs[opt] [TODO]
|
|
/// [OBJC] typedef-name objc-protocol-refs[opt] [TODO]
|
|
bool Parser::MaybeParseTypeSpecifier(DeclSpec &DS, int& isInvalid,
|
|
const char *&PrevSpec) {
|
|
// Annotate typenames and C++ scope specifiers.
|
|
TryAnnotateTypeOrScopeToken();
|
|
|
|
SourceLocation Loc = Tok.getLocation();
|
|
|
|
switch (Tok.getKind()) {
|
|
// simple-type-specifier:
|
|
case tok::annot_qualtypename: {
|
|
isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typedef, Loc, PrevSpec,
|
|
Tok.getAnnotationValue());
|
|
DS.SetRangeEnd(Tok.getAnnotationEndLoc());
|
|
ConsumeToken(); // The typename
|
|
|
|
// Objective-C supports syntax of the form 'id<proto1,proto2>' where 'id'
|
|
// is a specific typedef and 'itf<proto1,proto2>' where 'itf' is an
|
|
// Objective-C interface. If we don't have Objective-C or a '<', this is
|
|
// just a normal reference to a typedef name.
|
|
if (!Tok.is(tok::less) || !getLang().ObjC1)
|
|
return true;
|
|
|
|
SourceLocation EndProtoLoc;
|
|
llvm::SmallVector<DeclTy *, 8> ProtocolDecl;
|
|
ParseObjCProtocolReferences(ProtocolDecl, false, EndProtoLoc);
|
|
DS.setProtocolQualifiers(&ProtocolDecl[0], ProtocolDecl.size());
|
|
|
|
DS.SetRangeEnd(EndProtoLoc);
|
|
return true;
|
|
}
|
|
|
|
case tok::kw_short:
|
|
isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_short, Loc, PrevSpec);
|
|
break;
|
|
case tok::kw_long:
|
|
if (DS.getTypeSpecWidth() != DeclSpec::TSW_long)
|
|
isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_long, Loc, PrevSpec);
|
|
else
|
|
isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_longlong, Loc, PrevSpec);
|
|
break;
|
|
case tok::kw_signed:
|
|
isInvalid = DS.SetTypeSpecSign(DeclSpec::TSS_signed, Loc, PrevSpec);
|
|
break;
|
|
case tok::kw_unsigned:
|
|
isInvalid = DS.SetTypeSpecSign(DeclSpec::TSS_unsigned, Loc, PrevSpec);
|
|
break;
|
|
case tok::kw__Complex:
|
|
isInvalid = DS.SetTypeSpecComplex(DeclSpec::TSC_complex, Loc, PrevSpec);
|
|
break;
|
|
case tok::kw__Imaginary:
|
|
isInvalid = DS.SetTypeSpecComplex(DeclSpec::TSC_imaginary, Loc, PrevSpec);
|
|
break;
|
|
case tok::kw_void:
|
|
isInvalid = DS.SetTypeSpecType(DeclSpec::TST_void, Loc, PrevSpec);
|
|
break;
|
|
case tok::kw_char:
|
|
isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char, Loc, PrevSpec);
|
|
break;
|
|
case tok::kw_int:
|
|
isInvalid = DS.SetTypeSpecType(DeclSpec::TST_int, Loc, PrevSpec);
|
|
break;
|
|
case tok::kw_float:
|
|
isInvalid = DS.SetTypeSpecType(DeclSpec::TST_float, Loc, PrevSpec);
|
|
break;
|
|
case tok::kw_double:
|
|
isInvalid = DS.SetTypeSpecType(DeclSpec::TST_double, Loc, PrevSpec);
|
|
break;
|
|
case tok::kw_wchar_t:
|
|
isInvalid = DS.SetTypeSpecType(DeclSpec::TST_wchar, Loc, PrevSpec);
|
|
break;
|
|
case tok::kw_bool:
|
|
case tok::kw__Bool:
|
|
isInvalid = DS.SetTypeSpecType(DeclSpec::TST_bool, Loc, PrevSpec);
|
|
break;
|
|
case tok::kw__Decimal32:
|
|
isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal32, Loc, PrevSpec);
|
|
break;
|
|
case tok::kw__Decimal64:
|
|
isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal64, Loc, PrevSpec);
|
|
break;
|
|
case tok::kw__Decimal128:
|
|
isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal128, Loc, PrevSpec);
|
|
break;
|
|
|
|
// class-specifier:
|
|
case tok::kw_class:
|
|
case tok::kw_struct:
|
|
case tok::kw_union:
|
|
ParseClassSpecifier(DS);
|
|
return true;
|
|
|
|
// enum-specifier:
|
|
case tok::kw_enum:
|
|
ParseEnumSpecifier(DS);
|
|
return true;
|
|
|
|
// cv-qualifier:
|
|
case tok::kw_const:
|
|
isInvalid = DS.SetTypeQual(DeclSpec::TQ_const , Loc, PrevSpec,
|
|
getLang())*2;
|
|
break;
|
|
case tok::kw_volatile:
|
|
isInvalid = DS.SetTypeQual(DeclSpec::TQ_volatile, Loc, PrevSpec,
|
|
getLang())*2;
|
|
break;
|
|
case tok::kw_restrict:
|
|
isInvalid = DS.SetTypeQual(DeclSpec::TQ_restrict, Loc, PrevSpec,
|
|
getLang())*2;
|
|
break;
|
|
|
|
// GNU typeof support.
|
|
case tok::kw_typeof:
|
|
ParseTypeofSpecifier(DS);
|
|
return true;
|
|
|
|
default:
|
|
// Not a type-specifier; do nothing.
|
|
return false;
|
|
}
|
|
|
|
// If the specifier combination wasn't legal, issue a diagnostic.
|
|
if (isInvalid) {
|
|
assert(PrevSpec && "Method did not return previous specifier!");
|
|
// Pick between error or extwarn.
|
|
unsigned DiagID = isInvalid == 1 ? diag::err_invalid_decl_spec_combination
|
|
: diag::ext_duplicate_declspec;
|
|
Diag(Tok, DiagID) << PrevSpec;
|
|
}
|
|
DS.SetRangeEnd(Tok.getLocation());
|
|
ConsumeToken(); // whatever we parsed above.
|
|
return true;
|
|
}
|
|
|
|
/// ParseStructDeclaration - Parse a struct declaration without the terminating
|
|
/// semicolon.
|
|
///
|
|
/// struct-declaration:
|
|
/// specifier-qualifier-list struct-declarator-list
|
|
/// [GNU] __extension__ struct-declaration
|
|
/// [GNU] specifier-qualifier-list
|
|
/// struct-declarator-list:
|
|
/// struct-declarator
|
|
/// struct-declarator-list ',' struct-declarator
|
|
/// [GNU] struct-declarator-list ',' attributes[opt] struct-declarator
|
|
/// struct-declarator:
|
|
/// declarator
|
|
/// [GNU] declarator attributes[opt]
|
|
/// declarator[opt] ':' constant-expression
|
|
/// [GNU] declarator[opt] ':' constant-expression attributes[opt]
|
|
///
|
|
void Parser::
|
|
ParseStructDeclaration(DeclSpec &DS,
|
|
llvm::SmallVectorImpl<FieldDeclarator> &Fields) {
|
|
if (Tok.is(tok::kw___extension__)) {
|
|
// __extension__ silences extension warnings in the subexpression.
|
|
ExtensionRAIIObject O(Diags); // Use RAII to do this.
|
|
ConsumeToken();
|
|
return ParseStructDeclaration(DS, Fields);
|
|
}
|
|
|
|
// Parse the common specifier-qualifiers-list piece.
|
|
SourceLocation DSStart = Tok.getLocation();
|
|
ParseSpecifierQualifierList(DS);
|
|
|
|
// If there are no declarators, issue a warning.
|
|
if (Tok.is(tok::semi)) {
|
|
Diag(DSStart, diag::w_no_declarators);
|
|
return;
|
|
}
|
|
|
|
// Read struct-declarators until we find the semicolon.
|
|
Fields.push_back(FieldDeclarator(DS));
|
|
while (1) {
|
|
FieldDeclarator &DeclaratorInfo = Fields.back();
|
|
|
|
/// struct-declarator: declarator
|
|
/// struct-declarator: declarator[opt] ':' constant-expression
|
|
if (Tok.isNot(tok::colon))
|
|
ParseDeclarator(DeclaratorInfo.D);
|
|
|
|
if (Tok.is(tok::colon)) {
|
|
ConsumeToken();
|
|
OwningExprResult Res(Actions, ParseConstantExpression());
|
|
if (Res.isInvalid())
|
|
SkipUntil(tok::semi, true, true);
|
|
else
|
|
DeclaratorInfo.BitfieldSize = Res.release();
|
|
}
|
|
|
|
// If attributes exist after the declarator, parse them.
|
|
if (Tok.is(tok::kw___attribute))
|
|
DeclaratorInfo.D.AddAttributes(ParseAttributes());
|
|
|
|
// If we don't have a comma, it is either the end of the list (a ';')
|
|
// or an error, bail out.
|
|
if (Tok.isNot(tok::comma))
|
|
return;
|
|
|
|
// Consume the comma.
|
|
ConsumeToken();
|
|
|
|
// Parse the next declarator.
|
|
Fields.push_back(FieldDeclarator(DS));
|
|
|
|
// Attributes are only allowed on the second declarator.
|
|
if (Tok.is(tok::kw___attribute))
|
|
Fields.back().D.AddAttributes(ParseAttributes());
|
|
}
|
|
}
|
|
|
|
/// ParseStructUnionBody
|
|
/// struct-contents:
|
|
/// struct-declaration-list
|
|
/// [EXT] empty
|
|
/// [GNU] "struct-declaration-list" without terminatoring ';'
|
|
/// struct-declaration-list:
|
|
/// struct-declaration
|
|
/// struct-declaration-list struct-declaration
|
|
/// [OBC] '@' 'defs' '(' class-name ')'
|
|
///
|
|
void Parser::ParseStructUnionBody(SourceLocation RecordLoc,
|
|
unsigned TagType, DeclTy *TagDecl) {
|
|
SourceLocation LBraceLoc = ConsumeBrace();
|
|
|
|
// Empty structs are an extension in C (C99 6.7.2.1p7), but are allowed in
|
|
// C++.
|
|
if (Tok.is(tok::r_brace) && !getLang().CPlusPlus)
|
|
Diag(Tok, diag::ext_empty_struct_union_enum)
|
|
<< DeclSpec::getSpecifierName((DeclSpec::TST)TagType);
|
|
|
|
llvm::SmallVector<DeclTy*, 32> FieldDecls;
|
|
llvm::SmallVector<FieldDeclarator, 8> FieldDeclarators;
|
|
|
|
// While we still have something to read, read the declarations in the struct.
|
|
while (Tok.isNot(tok::r_brace) && Tok.isNot(tok::eof)) {
|
|
// Each iteration of this loop reads one struct-declaration.
|
|
|
|
// Check for extraneous top-level semicolon.
|
|
if (Tok.is(tok::semi)) {
|
|
Diag(Tok, diag::ext_extra_struct_semi);
|
|
ConsumeToken();
|
|
continue;
|
|
}
|
|
|
|
// Parse all the comma separated declarators.
|
|
DeclSpec DS;
|
|
FieldDeclarators.clear();
|
|
if (!Tok.is(tok::at)) {
|
|
ParseStructDeclaration(DS, FieldDeclarators);
|
|
|
|
// Convert them all to fields.
|
|
for (unsigned i = 0, e = FieldDeclarators.size(); i != e; ++i) {
|
|
FieldDeclarator &FD = FieldDeclarators[i];
|
|
// Install the declarator into the current TagDecl.
|
|
DeclTy *Field = Actions.ActOnField(CurScope, TagDecl,
|
|
DS.getSourceRange().getBegin(),
|
|
FD.D, FD.BitfieldSize);
|
|
FieldDecls.push_back(Field);
|
|
}
|
|
} else { // Handle @defs
|
|
ConsumeToken();
|
|
if (!Tok.isObjCAtKeyword(tok::objc_defs)) {
|
|
Diag(Tok, diag::err_unexpected_at);
|
|
SkipUntil(tok::semi, true, true);
|
|
continue;
|
|
}
|
|
ConsumeToken();
|
|
ExpectAndConsume(tok::l_paren, diag::err_expected_lparen);
|
|
if (!Tok.is(tok::identifier)) {
|
|
Diag(Tok, diag::err_expected_ident);
|
|
SkipUntil(tok::semi, true, true);
|
|
continue;
|
|
}
|
|
llvm::SmallVector<DeclTy*, 16> Fields;
|
|
Actions.ActOnDefs(CurScope, TagDecl, Tok.getLocation(),
|
|
Tok.getIdentifierInfo(), Fields);
|
|
FieldDecls.insert(FieldDecls.end(), Fields.begin(), Fields.end());
|
|
ConsumeToken();
|
|
ExpectAndConsume(tok::r_paren, diag::err_expected_rparen);
|
|
}
|
|
|
|
if (Tok.is(tok::semi)) {
|
|
ConsumeToken();
|
|
} else if (Tok.is(tok::r_brace)) {
|
|
Diag(Tok, diag::ext_expected_semi_decl_list);
|
|
break;
|
|
} else {
|
|
Diag(Tok, diag::err_expected_semi_decl_list);
|
|
// Skip to end of block or statement
|
|
SkipUntil(tok::r_brace, true, true);
|
|
}
|
|
}
|
|
|
|
SourceLocation RBraceLoc = MatchRHSPunctuation(tok::r_brace, LBraceLoc);
|
|
|
|
AttributeList *AttrList = 0;
|
|
// If attributes exist after struct contents, parse them.
|
|
if (Tok.is(tok::kw___attribute))
|
|
AttrList = ParseAttributes();
|
|
|
|
Actions.ActOnFields(CurScope,
|
|
RecordLoc,TagDecl,&FieldDecls[0],FieldDecls.size(),
|
|
LBraceLoc, RBraceLoc,
|
|
AttrList);
|
|
}
|
|
|
|
|
|
/// ParseEnumSpecifier
|
|
/// enum-specifier: [C99 6.7.2.2]
|
|
/// 'enum' identifier[opt] '{' enumerator-list '}'
|
|
///[C99/C++]'enum' identifier[opt] '{' enumerator-list ',' '}'
|
|
/// [GNU] 'enum' attributes[opt] identifier[opt] '{' enumerator-list ',' [opt]
|
|
/// '}' attributes[opt]
|
|
/// 'enum' identifier
|
|
/// [GNU] 'enum' attributes[opt] identifier
|
|
///
|
|
/// [C++] elaborated-type-specifier:
|
|
/// [C++] 'enum' '::'[opt] nested-name-specifier[opt] identifier
|
|
///
|
|
void Parser::ParseEnumSpecifier(DeclSpec &DS) {
|
|
assert(Tok.is(tok::kw_enum) && "Not an enum specifier");
|
|
SourceLocation StartLoc = ConsumeToken();
|
|
|
|
// Parse the tag portion of this.
|
|
|
|
AttributeList *Attr = 0;
|
|
// If attributes exist after tag, parse them.
|
|
if (Tok.is(tok::kw___attribute))
|
|
Attr = ParseAttributes();
|
|
|
|
CXXScopeSpec SS;
|
|
if (getLang().CPlusPlus && MaybeParseCXXScopeSpecifier(SS)) {
|
|
if (Tok.isNot(tok::identifier)) {
|
|
Diag(Tok, diag::err_expected_ident);
|
|
if (Tok.isNot(tok::l_brace)) {
|
|
// Has no name and is not a definition.
|
|
// Skip the rest of this declarator, up until the comma or semicolon.
|
|
SkipUntil(tok::comma, true);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Must have either 'enum name' or 'enum {...}'.
|
|
if (Tok.isNot(tok::identifier) && Tok.isNot(tok::l_brace)) {
|
|
Diag(Tok, diag::err_expected_ident_lbrace);
|
|
|
|
// Skip the rest of this declarator, up until the comma or semicolon.
|
|
SkipUntil(tok::comma, true);
|
|
return;
|
|
}
|
|
|
|
// If an identifier is present, consume and remember it.
|
|
IdentifierInfo *Name = 0;
|
|
SourceLocation NameLoc;
|
|
if (Tok.is(tok::identifier)) {
|
|
Name = Tok.getIdentifierInfo();
|
|
NameLoc = ConsumeToken();
|
|
}
|
|
|
|
// There are three options here. If we have 'enum foo;', then this is a
|
|
// forward declaration. If we have 'enum foo {...' then this is a
|
|
// definition. Otherwise we have something like 'enum foo xyz', a reference.
|
|
//
|
|
// This is needed to handle stuff like this right (C99 6.7.2.3p11):
|
|
// enum foo {..}; void bar() { enum foo; } <- new foo in bar.
|
|
// enum foo {..}; void bar() { enum foo x; } <- use of old foo.
|
|
//
|
|
Action::TagKind TK;
|
|
if (Tok.is(tok::l_brace))
|
|
TK = Action::TK_Definition;
|
|
else if (Tok.is(tok::semi))
|
|
TK = Action::TK_Declaration;
|
|
else
|
|
TK = Action::TK_Reference;
|
|
DeclTy *TagDecl = Actions.ActOnTag(CurScope, DeclSpec::TST_enum, TK, StartLoc,
|
|
SS, Name, NameLoc, Attr);
|
|
|
|
if (Tok.is(tok::l_brace))
|
|
ParseEnumBody(StartLoc, TagDecl);
|
|
|
|
// TODO: semantic analysis on the declspec for enums.
|
|
const char *PrevSpec = 0;
|
|
if (DS.SetTypeSpecType(DeclSpec::TST_enum, StartLoc, PrevSpec, TagDecl))
|
|
Diag(StartLoc, diag::err_invalid_decl_spec_combination) << PrevSpec;
|
|
}
|
|
|
|
/// ParseEnumBody - Parse a {} enclosed enumerator-list.
|
|
/// enumerator-list:
|
|
/// enumerator
|
|
/// enumerator-list ',' enumerator
|
|
/// enumerator:
|
|
/// enumeration-constant
|
|
/// enumeration-constant '=' constant-expression
|
|
/// enumeration-constant:
|
|
/// identifier
|
|
///
|
|
void Parser::ParseEnumBody(SourceLocation StartLoc, DeclTy *EnumDecl) {
|
|
SourceLocation LBraceLoc = ConsumeBrace();
|
|
|
|
// C does not allow an empty enumerator-list, C++ does [dcl.enum].
|
|
if (Tok.is(tok::r_brace) && !getLang().CPlusPlus)
|
|
Diag(Tok, diag::ext_empty_struct_union_enum) << "enum";
|
|
|
|
llvm::SmallVector<DeclTy*, 32> EnumConstantDecls;
|
|
|
|
DeclTy *LastEnumConstDecl = 0;
|
|
|
|
// Parse the enumerator-list.
|
|
while (Tok.is(tok::identifier)) {
|
|
IdentifierInfo *Ident = Tok.getIdentifierInfo();
|
|
SourceLocation IdentLoc = ConsumeToken();
|
|
|
|
SourceLocation EqualLoc;
|
|
OwningExprResult AssignedVal(Actions);
|
|
if (Tok.is(tok::equal)) {
|
|
EqualLoc = ConsumeToken();
|
|
AssignedVal = ParseConstantExpression();
|
|
if (AssignedVal.isInvalid())
|
|
SkipUntil(tok::comma, tok::r_brace, true, true);
|
|
}
|
|
|
|
// Install the enumerator constant into EnumDecl.
|
|
DeclTy *EnumConstDecl = Actions.ActOnEnumConstant(CurScope, EnumDecl,
|
|
LastEnumConstDecl,
|
|
IdentLoc, Ident,
|
|
EqualLoc,
|
|
AssignedVal.release());
|
|
EnumConstantDecls.push_back(EnumConstDecl);
|
|
LastEnumConstDecl = EnumConstDecl;
|
|
|
|
if (Tok.isNot(tok::comma))
|
|
break;
|
|
SourceLocation CommaLoc = ConsumeToken();
|
|
|
|
if (Tok.isNot(tok::identifier) && !getLang().C99)
|
|
Diag(CommaLoc, diag::ext_c99_enumerator_list_comma);
|
|
}
|
|
|
|
// Eat the }.
|
|
MatchRHSPunctuation(tok::r_brace, LBraceLoc);
|
|
|
|
Actions.ActOnEnumBody(StartLoc, EnumDecl, &EnumConstantDecls[0],
|
|
EnumConstantDecls.size());
|
|
|
|
DeclTy *AttrList = 0;
|
|
// If attributes exist after the identifier list, parse them.
|
|
if (Tok.is(tok::kw___attribute))
|
|
AttrList = ParseAttributes(); // FIXME: where do they do?
|
|
}
|
|
|
|
/// isTypeSpecifierQualifier - Return true if the current token could be the
|
|
/// start of a type-qualifier-list.
|
|
bool Parser::isTypeQualifier() const {
|
|
switch (Tok.getKind()) {
|
|
default: return false;
|
|
// type-qualifier
|
|
case tok::kw_const:
|
|
case tok::kw_volatile:
|
|
case tok::kw_restrict:
|
|
return true;
|
|
}
|
|
}
|
|
|
|
/// isTypeSpecifierQualifier - Return true if the current token could be the
|
|
/// start of a specifier-qualifier-list.
|
|
bool Parser::isTypeSpecifierQualifier() {
|
|
// Annotate typenames and C++ scope specifiers.
|
|
TryAnnotateTypeOrScopeToken();
|
|
|
|
switch (Tok.getKind()) {
|
|
default: return false;
|
|
// GNU attributes support.
|
|
case tok::kw___attribute:
|
|
// GNU typeof support.
|
|
case tok::kw_typeof:
|
|
|
|
// type-specifiers
|
|
case tok::kw_short:
|
|
case tok::kw_long:
|
|
case tok::kw_signed:
|
|
case tok::kw_unsigned:
|
|
case tok::kw__Complex:
|
|
case tok::kw__Imaginary:
|
|
case tok::kw_void:
|
|
case tok::kw_char:
|
|
case tok::kw_wchar_t:
|
|
case tok::kw_int:
|
|
case tok::kw_float:
|
|
case tok::kw_double:
|
|
case tok::kw_bool:
|
|
case tok::kw__Bool:
|
|
case tok::kw__Decimal32:
|
|
case tok::kw__Decimal64:
|
|
case tok::kw__Decimal128:
|
|
|
|
// struct-or-union-specifier (C99) or class-specifier (C++)
|
|
case tok::kw_class:
|
|
case tok::kw_struct:
|
|
case tok::kw_union:
|
|
// enum-specifier
|
|
case tok::kw_enum:
|
|
|
|
// type-qualifier
|
|
case tok::kw_const:
|
|
case tok::kw_volatile:
|
|
case tok::kw_restrict:
|
|
|
|
// typedef-name
|
|
case tok::annot_qualtypename:
|
|
return true;
|
|
|
|
// GNU ObjC bizarre protocol extension: <proto1,proto2> with implicit 'id'.
|
|
case tok::less:
|
|
return getLang().ObjC1;
|
|
}
|
|
}
|
|
|
|
/// isDeclarationSpecifier() - Return true if the current token is part of a
|
|
/// declaration specifier.
|
|
bool Parser::isDeclarationSpecifier() {
|
|
// Annotate typenames and C++ scope specifiers.
|
|
TryAnnotateTypeOrScopeToken();
|
|
|
|
switch (Tok.getKind()) {
|
|
default: return false;
|
|
// storage-class-specifier
|
|
case tok::kw_typedef:
|
|
case tok::kw_extern:
|
|
case tok::kw___private_extern__:
|
|
case tok::kw_static:
|
|
case tok::kw_auto:
|
|
case tok::kw_register:
|
|
case tok::kw___thread:
|
|
|
|
// type-specifiers
|
|
case tok::kw_short:
|
|
case tok::kw_long:
|
|
case tok::kw_signed:
|
|
case tok::kw_unsigned:
|
|
case tok::kw__Complex:
|
|
case tok::kw__Imaginary:
|
|
case tok::kw_void:
|
|
case tok::kw_char:
|
|
case tok::kw_wchar_t:
|
|
case tok::kw_int:
|
|
case tok::kw_float:
|
|
case tok::kw_double:
|
|
case tok::kw_bool:
|
|
case tok::kw__Bool:
|
|
case tok::kw__Decimal32:
|
|
case tok::kw__Decimal64:
|
|
case tok::kw__Decimal128:
|
|
|
|
// struct-or-union-specifier (C99) or class-specifier (C++)
|
|
case tok::kw_class:
|
|
case tok::kw_struct:
|
|
case tok::kw_union:
|
|
// enum-specifier
|
|
case tok::kw_enum:
|
|
|
|
// type-qualifier
|
|
case tok::kw_const:
|
|
case tok::kw_volatile:
|
|
case tok::kw_restrict:
|
|
|
|
// function-specifier
|
|
case tok::kw_inline:
|
|
case tok::kw_virtual:
|
|
case tok::kw_explicit:
|
|
|
|
// typedef-name
|
|
case tok::annot_qualtypename:
|
|
|
|
// GNU typeof support.
|
|
case tok::kw_typeof:
|
|
|
|
// GNU attributes.
|
|
case tok::kw___attribute:
|
|
return true;
|
|
|
|
// GNU ObjC bizarre protocol extension: <proto1,proto2> with implicit 'id'.
|
|
case tok::less:
|
|
return getLang().ObjC1;
|
|
}
|
|
}
|
|
|
|
|
|
/// ParseTypeQualifierListOpt
|
|
/// type-qualifier-list: [C99 6.7.5]
|
|
/// type-qualifier
|
|
/// [GNU] attributes
|
|
/// type-qualifier-list type-qualifier
|
|
/// [GNU] type-qualifier-list attributes
|
|
///
|
|
void Parser::ParseTypeQualifierListOpt(DeclSpec &DS) {
|
|
while (1) {
|
|
int isInvalid = false;
|
|
const char *PrevSpec = 0;
|
|
SourceLocation Loc = Tok.getLocation();
|
|
|
|
switch (Tok.getKind()) {
|
|
default:
|
|
// If this is not a type-qualifier token, we're done reading type
|
|
// qualifiers. First verify that DeclSpec's are consistent.
|
|
DS.Finish(Diags, PP.getSourceManager(), getLang());
|
|
return;
|
|
case tok::kw_const:
|
|
isInvalid = DS.SetTypeQual(DeclSpec::TQ_const , Loc, PrevSpec,
|
|
getLang())*2;
|
|
break;
|
|
case tok::kw_volatile:
|
|
isInvalid = DS.SetTypeQual(DeclSpec::TQ_volatile, Loc, PrevSpec,
|
|
getLang())*2;
|
|
break;
|
|
case tok::kw_restrict:
|
|
isInvalid = DS.SetTypeQual(DeclSpec::TQ_restrict, Loc, PrevSpec,
|
|
getLang())*2;
|
|
break;
|
|
case tok::kw___attribute:
|
|
DS.AddAttributes(ParseAttributes());
|
|
continue; // do *not* consume the next token!
|
|
}
|
|
|
|
// If the specifier combination wasn't legal, issue a diagnostic.
|
|
if (isInvalid) {
|
|
assert(PrevSpec && "Method did not return previous specifier!");
|
|
// Pick between error or extwarn.
|
|
unsigned DiagID = isInvalid == 1 ? diag::err_invalid_decl_spec_combination
|
|
: diag::ext_duplicate_declspec;
|
|
Diag(Tok, DiagID) << PrevSpec;
|
|
}
|
|
ConsumeToken();
|
|
}
|
|
}
|
|
|
|
|
|
/// ParseDeclarator - Parse and verify a newly-initialized declarator.
|
|
///
|
|
void Parser::ParseDeclarator(Declarator &D) {
|
|
/// This implements the 'declarator' production in the C grammar, then checks
|
|
/// for well-formedness and issues diagnostics.
|
|
ParseDeclaratorInternal(D, &Parser::ParseDirectDeclarator);
|
|
}
|
|
|
|
/// ParseDeclaratorInternal - Parse a C or C++ declarator. The direct-declarator
|
|
/// is parsed by the function passed to it. Pass null, and the direct-declarator
|
|
/// isn't parsed at all, making this function effectively parse the C++
|
|
/// ptr-operator production.
|
|
///
|
|
/// declarator: [C99 6.7.5]
|
|
/// pointer[opt] direct-declarator
|
|
/// [C++] '&' declarator [C++ 8p4, dcl.decl]
|
|
/// [GNU] '&' restrict[opt] attributes[opt] declarator
|
|
///
|
|
/// pointer: [C99 6.7.5]
|
|
/// '*' type-qualifier-list[opt]
|
|
/// '*' type-qualifier-list[opt] pointer
|
|
///
|
|
/// ptr-operator:
|
|
/// '*' cv-qualifier-seq[opt]
|
|
/// '&'
|
|
/// [GNU] '&' restrict[opt] attributes[opt]
|
|
/// '::'[opt] nested-name-specifier '*' cv-qualifier-seq[opt] [TODO]
|
|
void Parser::ParseDeclaratorInternal(Declarator &D,
|
|
DirectDeclParseFunction DirectDeclParser) {
|
|
tok::TokenKind Kind = Tok.getKind();
|
|
|
|
// Not a pointer, C++ reference, or block.
|
|
if (Kind != tok::star && (Kind != tok::amp || !getLang().CPlusPlus) &&
|
|
(Kind != tok::caret || !getLang().Blocks)) {
|
|
if (DirectDeclParser)
|
|
(this->*DirectDeclParser)(D);
|
|
return;
|
|
}
|
|
|
|
// Otherwise, '*' -> pointer, '^' -> block, '&' -> reference.
|
|
SourceLocation Loc = ConsumeToken(); // Eat the * or &.
|
|
|
|
if (Kind == tok::star || (Kind == tok::caret && getLang().Blocks)) {
|
|
// Is a pointer.
|
|
DeclSpec DS;
|
|
|
|
ParseTypeQualifierListOpt(DS);
|
|
|
|
// Recursively parse the declarator.
|
|
ParseDeclaratorInternal(D, DirectDeclParser);
|
|
if (Kind == tok::star)
|
|
// Remember that we parsed a pointer type, and remember the type-quals.
|
|
D.AddTypeInfo(DeclaratorChunk::getPointer(DS.getTypeQualifiers(), Loc,
|
|
DS.TakeAttributes()));
|
|
else
|
|
// Remember that we parsed a Block type, and remember the type-quals.
|
|
D.AddTypeInfo(DeclaratorChunk::getBlockPointer(DS.getTypeQualifiers(),
|
|
Loc));
|
|
} else {
|
|
// Is a reference
|
|
DeclSpec DS;
|
|
|
|
// C++ 8.3.2p1: cv-qualified references are ill-formed except when the
|
|
// cv-qualifiers are introduced through the use of a typedef or of a
|
|
// template type argument, in which case the cv-qualifiers are ignored.
|
|
//
|
|
// [GNU] Retricted references are allowed.
|
|
// [GNU] Attributes on references are allowed.
|
|
ParseTypeQualifierListOpt(DS);
|
|
|
|
if (DS.getTypeQualifiers() != DeclSpec::TQ_unspecified) {
|
|
if (DS.getTypeQualifiers() & DeclSpec::TQ_const)
|
|
Diag(DS.getConstSpecLoc(),
|
|
diag::err_invalid_reference_qualifier_application) << "const";
|
|
if (DS.getTypeQualifiers() & DeclSpec::TQ_volatile)
|
|
Diag(DS.getVolatileSpecLoc(),
|
|
diag::err_invalid_reference_qualifier_application) << "volatile";
|
|
}
|
|
|
|
// Recursively parse the declarator.
|
|
ParseDeclaratorInternal(D, DirectDeclParser);
|
|
|
|
if (D.getNumTypeObjects() > 0) {
|
|
// C++ [dcl.ref]p4: There shall be no references to references.
|
|
DeclaratorChunk& InnerChunk = D.getTypeObject(D.getNumTypeObjects() - 1);
|
|
if (InnerChunk.Kind == DeclaratorChunk::Reference) {
|
|
if (const IdentifierInfo *II = D.getIdentifier())
|
|
Diag(InnerChunk.Loc, diag::err_illegal_decl_reference_to_reference)
|
|
<< II;
|
|
else
|
|
Diag(InnerChunk.Loc, diag::err_illegal_decl_reference_to_reference)
|
|
<< "type name";
|
|
|
|
// Once we've complained about the reference-to-reference, we
|
|
// can go ahead and build the (technically ill-formed)
|
|
// declarator: reference collapsing will take care of it.
|
|
}
|
|
}
|
|
|
|
// Remember that we parsed a reference type. It doesn't have type-quals.
|
|
D.AddTypeInfo(DeclaratorChunk::getReference(DS.getTypeQualifiers(), Loc,
|
|
DS.TakeAttributes()));
|
|
}
|
|
}
|
|
|
|
/// ParseDirectDeclarator
|
|
/// direct-declarator: [C99 6.7.5]
|
|
/// [C99] identifier
|
|
/// '(' declarator ')'
|
|
/// [GNU] '(' attributes declarator ')'
|
|
/// [C90] direct-declarator '[' constant-expression[opt] ']'
|
|
/// [C99] direct-declarator '[' type-qual-list[opt] assignment-expr[opt] ']'
|
|
/// [C99] direct-declarator '[' 'static' type-qual-list[opt] assign-expr ']'
|
|
/// [C99] direct-declarator '[' type-qual-list 'static' assignment-expr ']'
|
|
/// [C99] direct-declarator '[' type-qual-list[opt] '*' ']'
|
|
/// direct-declarator '(' parameter-type-list ')'
|
|
/// direct-declarator '(' identifier-list[opt] ')'
|
|
/// [GNU] direct-declarator '(' parameter-forward-declarations
|
|
/// parameter-type-list[opt] ')'
|
|
/// [C++] direct-declarator '(' parameter-declaration-clause ')'
|
|
/// cv-qualifier-seq[opt] exception-specification[opt]
|
|
/// [C++] declarator-id
|
|
///
|
|
/// declarator-id: [C++ 8]
|
|
/// id-expression
|
|
/// '::'[opt] nested-name-specifier[opt] type-name
|
|
///
|
|
/// id-expression: [C++ 5.1]
|
|
/// unqualified-id
|
|
/// qualified-id [TODO]
|
|
///
|
|
/// unqualified-id: [C++ 5.1]
|
|
/// identifier
|
|
/// operator-function-id
|
|
/// conversion-function-id [TODO]
|
|
/// '~' class-name
|
|
/// template-id [TODO]
|
|
///
|
|
void Parser::ParseDirectDeclarator(Declarator &D) {
|
|
DeclaratorScopeObj DeclScopeObj(*this, D.getCXXScopeSpec());
|
|
|
|
if (getLang().CPlusPlus) {
|
|
if (D.mayHaveIdentifier()) {
|
|
bool afterCXXScope = MaybeParseCXXScopeSpecifier(D.getCXXScopeSpec());
|
|
if (afterCXXScope) {
|
|
// Change the declaration context for name lookup, until this function
|
|
// is exited (and the declarator has been parsed).
|
|
DeclScopeObj.EnterDeclaratorScope();
|
|
}
|
|
|
|
if (Tok.is(tok::identifier)) {
|
|
assert(Tok.getIdentifierInfo() && "Not an identifier?");
|
|
// Determine whether this identifier is a C++ constructor name or
|
|
// a normal identifier.
|
|
if (Actions.isCurrentClassName(*Tok.getIdentifierInfo(), CurScope)) {
|
|
D.setConstructor(Actions.isTypeName(*Tok.getIdentifierInfo(),
|
|
CurScope),
|
|
Tok.getLocation());
|
|
} else
|
|
D.SetIdentifier(Tok.getIdentifierInfo(), Tok.getLocation());
|
|
ConsumeToken();
|
|
goto PastIdentifier;
|
|
}
|
|
|
|
if (Tok.is(tok::tilde)) {
|
|
// This should be a C++ destructor.
|
|
SourceLocation TildeLoc = ConsumeToken();
|
|
if (Tok.is(tok::identifier)) {
|
|
if (TypeTy *Type = ParseClassName())
|
|
D.setDestructor(Type, TildeLoc);
|
|
else
|
|
D.SetIdentifier(0, TildeLoc);
|
|
} else {
|
|
Diag(Tok, diag::err_expected_class_name);
|
|
D.SetIdentifier(0, TildeLoc);
|
|
}
|
|
goto PastIdentifier;
|
|
}
|
|
|
|
// If we reached this point, token is not identifier and not '~'.
|
|
|
|
if (afterCXXScope) {
|
|
Diag(Tok, diag::err_expected_unqualified_id);
|
|
D.SetIdentifier(0, Tok.getLocation());
|
|
D.setInvalidType(true);
|
|
goto PastIdentifier;
|
|
}
|
|
}
|
|
|
|
if (Tok.is(tok::kw_operator)) {
|
|
SourceLocation OperatorLoc = Tok.getLocation();
|
|
|
|
// First try the name of an overloaded operator
|
|
if (OverloadedOperatorKind Op = TryParseOperatorFunctionId()) {
|
|
D.setOverloadedOperator(Op, OperatorLoc);
|
|
} else {
|
|
// This must be a conversion function (C++ [class.conv.fct]).
|
|
if (TypeTy *ConvType = ParseConversionFunctionId())
|
|
D.setConversionFunction(ConvType, OperatorLoc);
|
|
else
|
|
D.SetIdentifier(0, Tok.getLocation());
|
|
}
|
|
goto PastIdentifier;
|
|
}
|
|
}
|
|
|
|
// If we reached this point, we are either in C/ObjC or the token didn't
|
|
// satisfy any of the C++-specific checks.
|
|
|
|
if (Tok.is(tok::identifier) && D.mayHaveIdentifier()) {
|
|
assert(!getLang().CPlusPlus &&
|
|
"There's a C++-specific check for tok::identifier above");
|
|
assert(Tok.getIdentifierInfo() && "Not an identifier?");
|
|
D.SetIdentifier(Tok.getIdentifierInfo(), Tok.getLocation());
|
|
ConsumeToken();
|
|
} else if (Tok.is(tok::l_paren)) {
|
|
// direct-declarator: '(' declarator ')'
|
|
// direct-declarator: '(' attributes declarator ')'
|
|
// Example: 'char (*X)' or 'int (*XX)(void)'
|
|
ParseParenDeclarator(D);
|
|
} else if (D.mayOmitIdentifier()) {
|
|
// This could be something simple like "int" (in which case the declarator
|
|
// portion is empty), if an abstract-declarator is allowed.
|
|
D.SetIdentifier(0, Tok.getLocation());
|
|
} else {
|
|
if (getLang().CPlusPlus)
|
|
Diag(Tok, diag::err_expected_unqualified_id);
|
|
else
|
|
Diag(Tok, diag::err_expected_ident_lparen);
|
|
D.SetIdentifier(0, Tok.getLocation());
|
|
D.setInvalidType(true);
|
|
}
|
|
|
|
PastIdentifier:
|
|
assert(D.isPastIdentifier() &&
|
|
"Haven't past the location of the identifier yet?");
|
|
|
|
while (1) {
|
|
if (Tok.is(tok::l_paren)) {
|
|
// The paren may be part of a C++ direct initializer, eg. "int x(1);".
|
|
// In such a case, check if we actually have a function declarator; if it
|
|
// is not, the declarator has been fully parsed.
|
|
if (getLang().CPlusPlus && D.mayBeFollowedByCXXDirectInit()) {
|
|
// When not in file scope, warn for ambiguous function declarators, just
|
|
// in case the author intended it as a variable definition.
|
|
bool warnIfAmbiguous = D.getContext() != Declarator::FileContext;
|
|
if (!isCXXFunctionDeclarator(warnIfAmbiguous))
|
|
break;
|
|
}
|
|
ParseFunctionDeclarator(ConsumeParen(), D);
|
|
} else if (Tok.is(tok::l_square)) {
|
|
ParseBracketDeclarator(D);
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/// ParseParenDeclarator - We parsed the declarator D up to a paren. This is
|
|
/// only called before the identifier, so these are most likely just grouping
|
|
/// parens for precedence. If we find that these are actually function
|
|
/// parameter parens in an abstract-declarator, we call ParseFunctionDeclarator.
|
|
///
|
|
/// direct-declarator:
|
|
/// '(' declarator ')'
|
|
/// [GNU] '(' attributes declarator ')'
|
|
/// direct-declarator '(' parameter-type-list ')'
|
|
/// direct-declarator '(' identifier-list[opt] ')'
|
|
/// [GNU] direct-declarator '(' parameter-forward-declarations
|
|
/// parameter-type-list[opt] ')'
|
|
///
|
|
void Parser::ParseParenDeclarator(Declarator &D) {
|
|
SourceLocation StartLoc = ConsumeParen();
|
|
assert(!D.isPastIdentifier() && "Should be called before passing identifier");
|
|
|
|
// Eat any attributes before we look at whether this is a grouping or function
|
|
// declarator paren. If this is a grouping paren, the attribute applies to
|
|
// the type being built up, for example:
|
|
// int (__attribute__(()) *x)(long y)
|
|
// If this ends up not being a grouping paren, the attribute applies to the
|
|
// first argument, for example:
|
|
// int (__attribute__(()) int x)
|
|
// In either case, we need to eat any attributes to be able to determine what
|
|
// sort of paren this is.
|
|
//
|
|
AttributeList *AttrList = 0;
|
|
bool RequiresArg = false;
|
|
if (Tok.is(tok::kw___attribute)) {
|
|
AttrList = ParseAttributes();
|
|
|
|
// We require that the argument list (if this is a non-grouping paren) be
|
|
// present even if the attribute list was empty.
|
|
RequiresArg = true;
|
|
}
|
|
|
|
// If we haven't past the identifier yet (or where the identifier would be
|
|
// stored, if this is an abstract declarator), then this is probably just
|
|
// grouping parens. However, if this could be an abstract-declarator, then
|
|
// this could also be the start of function arguments (consider 'void()').
|
|
bool isGrouping;
|
|
|
|
if (!D.mayOmitIdentifier()) {
|
|
// If this can't be an abstract-declarator, this *must* be a grouping
|
|
// paren, because we haven't seen the identifier yet.
|
|
isGrouping = true;
|
|
} else if (Tok.is(tok::r_paren) || // 'int()' is a function.
|
|
(getLang().CPlusPlus && Tok.is(tok::ellipsis)) || // C++ int(...)
|
|
isDeclarationSpecifier()) { // 'int(int)' is a function.
|
|
// This handles C99 6.7.5.3p11: in "typedef int X; void foo(X)", X is
|
|
// considered to be a type, not a K&R identifier-list.
|
|
isGrouping = false;
|
|
} else {
|
|
// Otherwise, this is a grouping paren, e.g. 'int (*X)' or 'int(X)'.
|
|
isGrouping = true;
|
|
}
|
|
|
|
// If this is a grouping paren, handle:
|
|
// direct-declarator: '(' declarator ')'
|
|
// direct-declarator: '(' attributes declarator ')'
|
|
if (isGrouping) {
|
|
bool hadGroupingParens = D.hasGroupingParens();
|
|
D.setGroupingParens(true);
|
|
if (AttrList)
|
|
D.AddAttributes(AttrList);
|
|
|
|
ParseDeclaratorInternal(D, &Parser::ParseDirectDeclarator);
|
|
// Match the ')'.
|
|
MatchRHSPunctuation(tok::r_paren, StartLoc);
|
|
|
|
D.setGroupingParens(hadGroupingParens);
|
|
return;
|
|
}
|
|
|
|
// Okay, if this wasn't a grouping paren, it must be the start of a function
|
|
// argument list. Recognize that this declarator will never have an
|
|
// identifier (and remember where it would have been), then call into
|
|
// ParseFunctionDeclarator to handle of argument list.
|
|
D.SetIdentifier(0, Tok.getLocation());
|
|
|
|
ParseFunctionDeclarator(StartLoc, D, AttrList, RequiresArg);
|
|
}
|
|
|
|
/// ParseFunctionDeclarator - We are after the identifier and have parsed the
|
|
/// declarator D up to a paren, which indicates that we are parsing function
|
|
/// arguments.
|
|
///
|
|
/// If AttrList is non-null, then the caller parsed those arguments immediately
|
|
/// after the open paren - they should be considered to be the first argument of
|
|
/// a parameter. If RequiresArg is true, then the first argument of the
|
|
/// function is required to be present and required to not be an identifier
|
|
/// list.
|
|
///
|
|
/// This method also handles this portion of the grammar:
|
|
/// parameter-type-list: [C99 6.7.5]
|
|
/// parameter-list
|
|
/// parameter-list ',' '...'
|
|
///
|
|
/// parameter-list: [C99 6.7.5]
|
|
/// parameter-declaration
|
|
/// parameter-list ',' parameter-declaration
|
|
///
|
|
/// parameter-declaration: [C99 6.7.5]
|
|
/// declaration-specifiers declarator
|
|
/// [C++] declaration-specifiers declarator '=' assignment-expression
|
|
/// [GNU] declaration-specifiers declarator attributes
|
|
/// declaration-specifiers abstract-declarator[opt]
|
|
/// [C++] declaration-specifiers abstract-declarator[opt]
|
|
/// '=' assignment-expression
|
|
/// [GNU] declaration-specifiers abstract-declarator[opt] attributes
|
|
///
|
|
/// For C++, after the parameter-list, it also parses "cv-qualifier-seq[opt]"
|
|
/// and "exception-specification[opt]"(TODO).
|
|
///
|
|
void Parser::ParseFunctionDeclarator(SourceLocation LParenLoc, Declarator &D,
|
|
AttributeList *AttrList,
|
|
bool RequiresArg) {
|
|
// lparen is already consumed!
|
|
assert(D.isPastIdentifier() && "Should not call before identifier!");
|
|
|
|
// This parameter list may be empty.
|
|
if (Tok.is(tok::r_paren)) {
|
|
if (RequiresArg) {
|
|
Diag(Tok, diag::err_argument_required_after_attribute);
|
|
delete AttrList;
|
|
}
|
|
|
|
ConsumeParen(); // Eat the closing ')'.
|
|
|
|
// cv-qualifier-seq[opt].
|
|
DeclSpec DS;
|
|
if (getLang().CPlusPlus) {
|
|
ParseTypeQualifierListOpt(DS);
|
|
|
|
// Parse exception-specification[opt].
|
|
if (Tok.is(tok::kw_throw))
|
|
ParseExceptionSpecification();
|
|
}
|
|
|
|
// Remember that we parsed a function type, and remember the attributes.
|
|
// int() -> no prototype, no '...'.
|
|
D.AddTypeInfo(DeclaratorChunk::getFunction(/*prototype*/getLang().CPlusPlus,
|
|
/*variadic*/ false,
|
|
/*arglist*/ 0, 0,
|
|
DS.getTypeQualifiers(),
|
|
LParenLoc));
|
|
return;
|
|
}
|
|
|
|
// Alternatively, this parameter list may be an identifier list form for a
|
|
// K&R-style function: void foo(a,b,c)
|
|
if (!getLang().CPlusPlus && Tok.is(tok::identifier) &&
|
|
// K&R identifier lists can't have typedefs as identifiers, per
|
|
// C99 6.7.5.3p11.
|
|
!Actions.isTypeName(*Tok.getIdentifierInfo(), CurScope)) {
|
|
if (RequiresArg) {
|
|
Diag(Tok, diag::err_argument_required_after_attribute);
|
|
delete AttrList;
|
|
}
|
|
|
|
// Identifier list. Note that '(' identifier-list ')' is only allowed for
|
|
// normal declarators, not for abstract-declarators.
|
|
return ParseFunctionDeclaratorIdentifierList(LParenLoc, D);
|
|
}
|
|
|
|
// Finally, a normal, non-empty parameter type list.
|
|
|
|
// Build up an array of information about the parsed arguments.
|
|
llvm::SmallVector<DeclaratorChunk::ParamInfo, 16> ParamInfo;
|
|
|
|
// Enter function-declaration scope, limiting any declarators to the
|
|
// function prototype scope, including parameter declarators.
|
|
ParseScope PrototypeScope(this, Scope::FnScope|Scope::DeclScope);
|
|
|
|
bool IsVariadic = false;
|
|
while (1) {
|
|
if (Tok.is(tok::ellipsis)) {
|
|
IsVariadic = true;
|
|
|
|
// Check to see if this is "void(...)" which is not allowed.
|
|
if (!getLang().CPlusPlus && ParamInfo.empty()) {
|
|
// Otherwise, parse parameter type list. If it starts with an
|
|
// ellipsis, diagnose the malformed function.
|
|
Diag(Tok, diag::err_ellipsis_first_arg);
|
|
IsVariadic = false; // Treat this like 'void()'.
|
|
}
|
|
|
|
ConsumeToken(); // Consume the ellipsis.
|
|
break;
|
|
}
|
|
|
|
SourceLocation DSStart = Tok.getLocation();
|
|
|
|
// Parse the declaration-specifiers.
|
|
DeclSpec DS;
|
|
|
|
// If the caller parsed attributes for the first argument, add them now.
|
|
if (AttrList) {
|
|
DS.AddAttributes(AttrList);
|
|
AttrList = 0; // Only apply the attributes to the first parameter.
|
|
}
|
|
ParseDeclarationSpecifiers(DS);
|
|
|
|
// Parse the declarator. This is "PrototypeContext", because we must
|
|
// accept either 'declarator' or 'abstract-declarator' here.
|
|
Declarator ParmDecl(DS, Declarator::PrototypeContext);
|
|
ParseDeclarator(ParmDecl);
|
|
|
|
// Parse GNU attributes, if present.
|
|
if (Tok.is(tok::kw___attribute))
|
|
ParmDecl.AddAttributes(ParseAttributes());
|
|
|
|
// Remember this parsed parameter in ParamInfo.
|
|
IdentifierInfo *ParmII = ParmDecl.getIdentifier();
|
|
|
|
// If no parameter was specified, verify that *something* was specified,
|
|
// otherwise we have a missing type and identifier.
|
|
if (DS.getParsedSpecifiers() == DeclSpec::PQ_None &&
|
|
ParmDecl.getIdentifier() == 0 && ParmDecl.getNumTypeObjects() == 0) {
|
|
// Completely missing, emit error.
|
|
Diag(DSStart, diag::err_missing_param);
|
|
} else {
|
|
// Otherwise, we have something. Add it and let semantic analysis try
|
|
// to grok it and add the result to the ParamInfo we are building.
|
|
|
|
// Inform the actions module about the parameter declarator, so it gets
|
|
// added to the current scope.
|
|
DeclTy *Param = Actions.ActOnParamDeclarator(CurScope, ParmDecl);
|
|
|
|
// Parse the default argument, if any. We parse the default
|
|
// arguments in all dialects; the semantic analysis in
|
|
// ActOnParamDefaultArgument will reject the default argument in
|
|
// C.
|
|
if (Tok.is(tok::equal)) {
|
|
SourceLocation EqualLoc = Tok.getLocation();
|
|
|
|
// Consume the '='.
|
|
ConsumeToken();
|
|
|
|
// Parse the default argument
|
|
OwningExprResult DefArgResult(Actions, ParseAssignmentExpression());
|
|
if (DefArgResult.isInvalid()) {
|
|
SkipUntil(tok::comma, tok::r_paren, true, true);
|
|
} else {
|
|
// Inform the actions module about the default argument
|
|
Actions.ActOnParamDefaultArgument(Param, EqualLoc,
|
|
DefArgResult.release());
|
|
}
|
|
}
|
|
|
|
ParamInfo.push_back(DeclaratorChunk::ParamInfo(ParmII,
|
|
ParmDecl.getIdentifierLoc(), Param));
|
|
}
|
|
|
|
// If the next token is a comma, consume it and keep reading arguments.
|
|
if (Tok.isNot(tok::comma)) break;
|
|
|
|
// Consume the comma.
|
|
ConsumeToken();
|
|
}
|
|
|
|
// Leave prototype scope.
|
|
PrototypeScope.Exit();
|
|
|
|
// If we have the closing ')', eat it.
|
|
MatchRHSPunctuation(tok::r_paren, LParenLoc);
|
|
|
|
DeclSpec DS;
|
|
if (getLang().CPlusPlus) {
|
|
// Parse cv-qualifier-seq[opt].
|
|
ParseTypeQualifierListOpt(DS);
|
|
|
|
// Parse exception-specification[opt].
|
|
if (Tok.is(tok::kw_throw))
|
|
ParseExceptionSpecification();
|
|
}
|
|
|
|
// Remember that we parsed a function type, and remember the attributes.
|
|
D.AddTypeInfo(DeclaratorChunk::getFunction(/*proto*/true, IsVariadic,
|
|
&ParamInfo[0], ParamInfo.size(),
|
|
DS.getTypeQualifiers(),
|
|
LParenLoc));
|
|
}
|
|
|
|
/// ParseFunctionDeclaratorIdentifierList - While parsing a function declarator
|
|
/// we found a K&R-style identifier list instead of a type argument list. The
|
|
/// current token is known to be the first identifier in the list.
|
|
///
|
|
/// identifier-list: [C99 6.7.5]
|
|
/// identifier
|
|
/// identifier-list ',' identifier
|
|
///
|
|
void Parser::ParseFunctionDeclaratorIdentifierList(SourceLocation LParenLoc,
|
|
Declarator &D) {
|
|
// Build up an array of information about the parsed arguments.
|
|
llvm::SmallVector<DeclaratorChunk::ParamInfo, 16> ParamInfo;
|
|
llvm::SmallSet<const IdentifierInfo*, 16> ParamsSoFar;
|
|
|
|
// If there was no identifier specified for the declarator, either we are in
|
|
// an abstract-declarator, or we are in a parameter declarator which was found
|
|
// to be abstract. In abstract-declarators, identifier lists are not valid:
|
|
// diagnose this.
|
|
if (!D.getIdentifier())
|
|
Diag(Tok, diag::ext_ident_list_in_param);
|
|
|
|
// Tok is known to be the first identifier in the list. Remember this
|
|
// identifier in ParamInfo.
|
|
ParamsSoFar.insert(Tok.getIdentifierInfo());
|
|
ParamInfo.push_back(DeclaratorChunk::ParamInfo(Tok.getIdentifierInfo(),
|
|
Tok.getLocation(), 0));
|
|
|
|
ConsumeToken(); // eat the first identifier.
|
|
|
|
while (Tok.is(tok::comma)) {
|
|
// Eat the comma.
|
|
ConsumeToken();
|
|
|
|
// If this isn't an identifier, report the error and skip until ')'.
|
|
if (Tok.isNot(tok::identifier)) {
|
|
Diag(Tok, diag::err_expected_ident);
|
|
SkipUntil(tok::r_paren);
|
|
return;
|
|
}
|
|
|
|
IdentifierInfo *ParmII = Tok.getIdentifierInfo();
|
|
|
|
// Reject 'typedef int y; int test(x, y)', but continue parsing.
|
|
if (Actions.isTypeName(*ParmII, CurScope))
|
|
Diag(Tok, diag::err_unexpected_typedef_ident) << ParmII;
|
|
|
|
// Verify that the argument identifier has not already been mentioned.
|
|
if (!ParamsSoFar.insert(ParmII)) {
|
|
Diag(Tok, diag::err_param_redefinition) << ParmII;
|
|
} else {
|
|
// Remember this identifier in ParamInfo.
|
|
ParamInfo.push_back(DeclaratorChunk::ParamInfo(ParmII,
|
|
Tok.getLocation(), 0));
|
|
}
|
|
|
|
// Eat the identifier.
|
|
ConsumeToken();
|
|
}
|
|
|
|
// Remember that we parsed a function type, and remember the attributes. This
|
|
// function type is always a K&R style function type, which is not varargs and
|
|
// has no prototype.
|
|
D.AddTypeInfo(DeclaratorChunk::getFunction(/*proto*/false, /*varargs*/false,
|
|
&ParamInfo[0], ParamInfo.size(),
|
|
/*TypeQuals*/0, LParenLoc));
|
|
|
|
// If we have the closing ')', eat it and we're done.
|
|
MatchRHSPunctuation(tok::r_paren, LParenLoc);
|
|
}
|
|
|
|
/// [C90] direct-declarator '[' constant-expression[opt] ']'
|
|
/// [C99] direct-declarator '[' type-qual-list[opt] assignment-expr[opt] ']'
|
|
/// [C99] direct-declarator '[' 'static' type-qual-list[opt] assign-expr ']'
|
|
/// [C99] direct-declarator '[' type-qual-list 'static' assignment-expr ']'
|
|
/// [C99] direct-declarator '[' type-qual-list[opt] '*' ']'
|
|
void Parser::ParseBracketDeclarator(Declarator &D) {
|
|
SourceLocation StartLoc = ConsumeBracket();
|
|
|
|
// If valid, this location is the position where we read the 'static' keyword.
|
|
SourceLocation StaticLoc;
|
|
if (Tok.is(tok::kw_static))
|
|
StaticLoc = ConsumeToken();
|
|
|
|
// If there is a type-qualifier-list, read it now.
|
|
DeclSpec DS;
|
|
ParseTypeQualifierListOpt(DS);
|
|
|
|
// If we haven't already read 'static', check to see if there is one after the
|
|
// type-qualifier-list.
|
|
if (!StaticLoc.isValid() && Tok.is(tok::kw_static))
|
|
StaticLoc = ConsumeToken();
|
|
|
|
// Handle "direct-declarator [ type-qual-list[opt] * ]".
|
|
bool isStar = false;
|
|
OwningExprResult NumElements(Actions);
|
|
|
|
// Handle the case where we have '[*]' as the array size. However, a leading
|
|
// star could be the start of an expression, for example 'X[*p + 4]'. Verify
|
|
// the the token after the star is a ']'. Since stars in arrays are
|
|
// infrequent, use of lookahead is not costly here.
|
|
if (Tok.is(tok::star) && GetLookAheadToken(1).is(tok::r_square)) {
|
|
ConsumeToken(); // Eat the '*'.
|
|
|
|
if (StaticLoc.isValid())
|
|
Diag(StaticLoc, diag::err_unspecified_vla_size_with_static);
|
|
StaticLoc = SourceLocation(); // Drop the static.
|
|
isStar = true;
|
|
} else if (Tok.isNot(tok::r_square)) {
|
|
// Parse the assignment-expression now.
|
|
NumElements = ParseAssignmentExpression();
|
|
}
|
|
|
|
// If there was an error parsing the assignment-expression, recover.
|
|
if (NumElements.isInvalid()) {
|
|
// If the expression was invalid, skip it.
|
|
SkipUntil(tok::r_square);
|
|
return;
|
|
}
|
|
|
|
MatchRHSPunctuation(tok::r_square, StartLoc);
|
|
|
|
// If C99 isn't enabled, emit an ext-warn if the arg list wasn't empty and if
|
|
// it was not a constant expression.
|
|
if (!getLang().C99) {
|
|
// TODO: check C90 array constant exprness.
|
|
if (isStar || StaticLoc.isValid() ||
|
|
0/*TODO: NumElts is not a C90 constantexpr */)
|
|
Diag(StartLoc, diag::ext_c99_array_usage);
|
|
}
|
|
|
|
// Remember that we parsed a pointer type, and remember the type-quals.
|
|
D.AddTypeInfo(DeclaratorChunk::getArray(DS.getTypeQualifiers(),
|
|
StaticLoc.isValid(), isStar,
|
|
NumElements.release(), StartLoc));
|
|
}
|
|
|
|
/// [GNU] typeof-specifier:
|
|
/// typeof ( expressions )
|
|
/// typeof ( type-name )
|
|
/// [GNU/C++] typeof unary-expression
|
|
///
|
|
void Parser::ParseTypeofSpecifier(DeclSpec &DS) {
|
|
assert(Tok.is(tok::kw_typeof) && "Not a typeof specifier");
|
|
const IdentifierInfo *BuiltinII = Tok.getIdentifierInfo();
|
|
SourceLocation StartLoc = ConsumeToken();
|
|
|
|
if (Tok.isNot(tok::l_paren)) {
|
|
if (!getLang().CPlusPlus) {
|
|
Diag(Tok, diag::err_expected_lparen_after_id) << BuiltinII;
|
|
return;
|
|
}
|
|
|
|
OwningExprResult Result(Actions,
|
|
ParseCastExpression(true/*isUnaryExpression*/));
|
|
if (Result.isInvalid())
|
|
return;
|
|
|
|
const char *PrevSpec = 0;
|
|
// Check for duplicate type specifiers.
|
|
if (DS.SetTypeSpecType(DeclSpec::TST_typeofExpr, StartLoc, PrevSpec,
|
|
Result.release()))
|
|
Diag(StartLoc, diag::err_invalid_decl_spec_combination) << PrevSpec;
|
|
|
|
// FIXME: Not accurate, the range gets one token more than it should.
|
|
DS.SetRangeEnd(Tok.getLocation());
|
|
return;
|
|
}
|
|
|
|
SourceLocation LParenLoc = ConsumeParen(), RParenLoc;
|
|
|
|
if (isTypeIdInParens()) {
|
|
TypeTy *Ty = ParseTypeName();
|
|
|
|
assert(Ty && "Parser::ParseTypeofSpecifier(): missing type");
|
|
|
|
if (Tok.isNot(tok::r_paren)) {
|
|
MatchRHSPunctuation(tok::r_paren, LParenLoc);
|
|
return;
|
|
}
|
|
RParenLoc = ConsumeParen();
|
|
const char *PrevSpec = 0;
|
|
// Check for duplicate type specifiers (e.g. "int typeof(int)").
|
|
if (DS.SetTypeSpecType(DeclSpec::TST_typeofType, StartLoc, PrevSpec, Ty))
|
|
Diag(StartLoc, diag::err_invalid_decl_spec_combination) << PrevSpec;
|
|
} else { // we have an expression.
|
|
OwningExprResult Result(Actions, ParseExpression());
|
|
|
|
if (Result.isInvalid() || Tok.isNot(tok::r_paren)) {
|
|
MatchRHSPunctuation(tok::r_paren, LParenLoc);
|
|
return;
|
|
}
|
|
RParenLoc = ConsumeParen();
|
|
const char *PrevSpec = 0;
|
|
// Check for duplicate type specifiers (e.g. "int typeof(int)").
|
|
if (DS.SetTypeSpecType(DeclSpec::TST_typeofExpr, StartLoc, PrevSpec,
|
|
Result.release()))
|
|
Diag(StartLoc, diag::err_invalid_decl_spec_combination) << PrevSpec;
|
|
}
|
|
DS.SetRangeEnd(RParenLoc);
|
|
}
|
|
|
|
|