зеркало из https://github.com/microsoft/clang-1.git
131 строка
4.0 KiB
C++
131 строка
4.0 KiB
C++
//===--- Arg.h - Parsed Argument Classes ------------------------*- C++ -*-===//
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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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/// \file
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/// \brief Defines the clang::driver::Arg class for parsed arguments.
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///
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//===----------------------------------------------------------------------===//
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#ifndef CLANG_DRIVER_ARG_H_
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#define CLANG_DRIVER_ARG_H_
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#include "Util.h"
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/ADT/StringRef.h"
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#include <string>
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namespace clang {
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namespace driver {
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class ArgList;
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class Option;
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/// \brief A concrete instance of a particular driver option.
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///
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/// The Arg class encodes just enough information to be able to
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/// derive the argument values efficiently. In addition, Arg
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/// instances have an intrusive double linked list which is used by
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/// ArgList to provide efficient iteration over all instances of a
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/// particular option.
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class Arg {
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Arg(const Arg &); // DO NOT IMPLEMENT
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void operator=(const Arg &); // DO NOT IMPLEMENT
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private:
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/// \brief The option this argument is an instance of.
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const Option *Opt;
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/// \brief The argument this argument was derived from (during tool chain
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/// argument translation), if any.
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const Arg *BaseArg;
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/// \brief The index at which this argument appears in the containing
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/// ArgList.
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unsigned Index;
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/// \brief Was this argument used to effect compilation?
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///
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/// This is used for generating "argument unused" diagnostics.
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mutable unsigned Claimed : 1;
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/// \brief Does this argument own its values?
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mutable unsigned OwnsValues : 1;
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/// \brief The argument values, as C strings.
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SmallVector<const char *, 2> Values;
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public:
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Arg(const Option *Opt, unsigned Index, const Arg *BaseArg = 0);
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Arg(const Option *Opt, unsigned Index,
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const char *Value0, const Arg *BaseArg = 0);
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Arg(const Option *Opt, unsigned Index,
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const char *Value0, const char *Value1, const Arg *BaseArg = 0);
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~Arg();
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const Option &getOption() const { return *Opt; }
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unsigned getIndex() const { return Index; }
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/// \brief Return the base argument which generated this arg.
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///
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/// This is either the argument itself or the argument it was
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/// derived from during tool chain specific argument translation.
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const Arg &getBaseArg() const {
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return BaseArg ? *BaseArg : *this;
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}
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void setBaseArg(const Arg *_BaseArg) {
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BaseArg = _BaseArg;
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}
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bool getOwnsValues() const { return OwnsValues; }
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void setOwnsValues(bool Value) const { OwnsValues = Value; }
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bool isClaimed() const { return getBaseArg().Claimed; }
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/// \brief Set the Arg claimed bit.
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void claim() const { getBaseArg().Claimed = true; }
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unsigned getNumValues() const { return Values.size(); }
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const char *getValue(const ArgList &Args, unsigned N=0) const {
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return Values[N];
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}
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SmallVectorImpl<const char*> &getValues() {
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return Values;
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}
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bool containsValue(StringRef Value) const {
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for (unsigned i = 0, e = getNumValues(); i != e; ++i)
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if (Values[i] == Value)
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return true;
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return false;
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}
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/// \brief Append the argument onto the given array as strings.
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void render(const ArgList &Args, ArgStringList &Output) const;
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/// \brief Append the argument, render as an input, onto the given
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/// array as strings.
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///
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/// The distinction is that some options only render their values
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/// when rendered as a input (e.g., Xlinker).
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void renderAsInput(const ArgList &Args, ArgStringList &Output) const;
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static bool classof(const Arg *) { return true; }
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void dump() const;
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/// \brief Return a formatted version of the argument and
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/// its values, for debugging and diagnostics.
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std::string getAsString(const ArgList &Args) const;
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};
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} // end namespace driver
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} // end namespace clang
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#endif
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