Fix directive parsing in VerifyDiagnosticConsumer so that it ensures that "expected" is at the start of the word and will no longer accept typos such as "junkexpected-*" as a valid "expected-*" directive. A very few test-cases had to be amended to adhere to the new rule.

Patch reviewed by David Blaikie.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@166279 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Frontend/VerifyDiagnosticConsumer.cpp

@@ -226,10 +226,22 @@ public:
 
   // Return true if string literal is found.
   // When true, P marks begin-position of S in content.
-  bool Search(StringRef S) {
-    P = std::search(C, End, S.begin(), S.end());
-    PEnd = P + S.size();
-    return P != End;
+  bool Search(StringRef S, bool EnsureStartOfWord = false) {
+    do {
+      P = std::search(C, End, S.begin(), S.end());
+      PEnd = P + S.size();
+      if (P == End)
+        break;
+      if (!EnsureStartOfWord
+            // Check if string literal starts a new word.
+            || P == Begin || isspace(P[-1])
+            // Or it could be preceeded by the start of a comment.
+            || (P > (Begin + 1) && (P[-1] == '/' || P[-1] == '*')
+                                &&  P[-2] == '/'))
+        return true;
+      // Otherwise, skip and search again.
+    } while (Advance());
+    return false;
   }
 
   // Advance 1-past previous next/search.
@@ -271,7 +283,7 @@ static bool ParseDirective(StringRef S, ExpectedData *ED, SourceManager &SM,
   bool FoundDirective = false;
   for (ParseHelper PH(S); !PH.Done();) {
     // Search for token: expected
-    if (!PH.Search("expected"))
+    if (!PH.Search("expected", true))
       break;
     PH.Advance();
 

test/CXX/dcl.decl/dcl.meaning/dcl.fct.default/p3.cpp

@@ -1,9 +1,9 @@
 // RUN: %clang_cc1 -fsyntax-only -verify %s
 
-void nondecl(int (*f)(int x = 5)) // {expected-error {{default arguments can only be specified}}}
+void nondecl(int (*f)(int x = 5)) // expected-error {{default arguments can only be specified}}
 {
-  void (*f2)(int = 17)  // {expected-error {{default arguments can only be specified}}}
-  = (void (*)(int = 42))f; // {expected-error {{default arguments can only be specified}}}
+  void (*f2)(int = 17)  // expected-error {{default arguments can only be specified}}
+  = (void (*)(int = 42))f; // expected-error {{default arguments can only be specified}}
 }
 
 struct X0 {

test/CXX/expr/expr.prim/expr.prim.general/p3-0x.cpp

@@ -91,11 +91,11 @@ namespace Static {
 
 namespace PR12564 {
   struct Base {
-    void bar(Base&) {} // unexpected-note {{here}}
+    void bar(Base&) {} // FIXME: expected-note {{here}}
   };
 
   struct Derived : Base {
     // FIXME: This should be accepted.
-    void foo(Derived& d) noexcept(noexcept(d.bar(d))) {} // unexpected-error {{cannot bind to a value of unrelated type}}
+    void foo(Derived& d) noexcept(noexcept(d.bar(d))) {} // expected-error {{cannot bind to a value of unrelated type}}
   };
 }

test/Frontend/verify.c

@@ -22,7 +22,7 @@
 #if 0
 // expected-error {{should be ignored}}
 #endif
-
+// eexpected-error {{should also be ignored: unrecognised directive}}
 #error should not be ignored
 // expected-error@-1 1+ {{should not be ignored}}
 

test/Sema/compound-literal.c

@@ -6,15 +6,15 @@ struct foo { int a, b; };
 static struct foo t = (struct foo){0,0};
 static struct foo t1 = __builtin_choose_expr(0, (struct foo){0,0}, (struct foo){0,0});
 static struct foo t2 = {0,0};
-static struct foo t3 = t2; // -expected-error {{initializer element is not a compile-time constant}}
+static struct foo t3 = t2; // expected-error {{initializer element is not a compile-time constant}}
 static int *p = (int []){2,4};
 static int x = (int){1};
 
-static int *p2 = (int []){2,x}; // -expected-error {{initializer element is not a compile-time constant}}
-static long *p3 = (long []){2,"x"}; // -expected-warning {{incompatible pointer to integer conversion initializing 'long' with an expression of type 'char [2]'}}
+static int *p2 = (int []){2,x}; // expected-error {{initializer element is not a compile-time constant}}
+static long *p3 = (long []){2,"x"}; // expected-warning {{incompatible pointer to integer conversion initializing 'long' with an expression of type 'char [2]'}}
 
-typedef struct { } cache_t; // -expected-warning{{empty struct is a GNU extension}}
-static cache_t clo_I1_cache = ((cache_t) { } ); // -expected-warning{{use of GNU empty initializer extension}}
+typedef struct { } cache_t; // expected-warning{{empty struct is a GNU extension}}
+static cache_t clo_I1_cache = ((cache_t) { } ); // expected-warning{{use of GNU empty initializer extension}}
 
 typedef struct Test {int a;int b;} Test;
 static Test* ll = &(Test) {0,0};
@@ -27,11 +27,11 @@ int main(int argc, char **argv) {
 }
 
 struct Incomplete; // expected-note{{forward declaration of 'struct Incomplete'}}
-struct Incomplete* I1 = &(struct Incomplete){1, 2, 3}; // -expected-error {{variable has incomplete type}}
+struct Incomplete* I1 = &(struct Incomplete){1, 2, 3}; // expected-error {{variable has incomplete type}}
 void IncompleteFunc(unsigned x) {
-  struct Incomplete* I2 = (struct foo[x]){1, 2, 3}; // -expected-error {{variable-sized object may not be initialized}}
-  (void){1,2,3}; // -expected-error {{variable has incomplete type}}
-  (void(void)) { 0 }; // -expected-error{{illegal initializer type 'void (void)'}}
+  struct Incomplete* I2 = (struct foo[x]){1, 2, 3}; // expected-error {{variable-sized object may not be initialized}}
+  (void){1,2,3}; // expected-error {{variable has incomplete type}}
+  (void(void)) { 0 }; // expected-error{{illegal initializer type 'void (void)'}}
 }
 
 // PR6080

test/Sema/vector-cast.c

@@ -10,22 +10,22 @@ void f()
   t2 v2;
   t3 v3;
   
-  v2 = (t2)v1; // -expected-error {{invalid conversion between vector type \
+  v2 = (t2)v1; // expected-error {{invalid conversion between vector type \
 't2' and 't1' of different size}}
-  v1 = (t1)v2; // -expected-error {{invalid conversion between vector type \
+  v1 = (t1)v2; // expected-error {{invalid conversion between vector type \
 't1' and 't2' of different size}}
   v3 = (t3)v2;
   
-  v1 = (t1)(char *)10; // -expected-error {{invalid conversion between vector \
+  v1 = (t1)(char *)10; // expected-error {{invalid conversion between vector \
 type 't1' and scalar type 'char *'}}
   v1 = (t1)(long long)10;
-  v1 = (t1)(short)10; // -expected-error {{invalid conversion between vector \
+  v1 = (t1)(short)10; // expected-error {{invalid conversion between vector \
 type 't1' and integer type 'short' of different size}}
   
   long long r1 = (long long)v1;
-  short r2 = (short)v1; // -expected-error {{invalid conversion between vector \
+  short r2 = (short)v1; // expected-error {{invalid conversion between vector \
 type 't1' and integer type 'short' of different size}}
-  char *r3 = (char *)v1; // -expected-error {{invalid conversion between vector\
+  char *r3 = (char *)v1; // expected-error {{invalid conversion between vector\
  type 't1' and scalar type 'char *'}}
 }