In Sema::ClassifyName, try to avoid nonsensical corrections to

keywords when doing type correction.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@159464 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Sema/SemaDecl.cpp

@@ -634,6 +634,19 @@ Sema::NameClassification Sema::ClassifyName(Scope *S,
     if (!SecondTry) {
       SecondTry = true;
       CorrectionCandidateCallback DefaultValidator;
+      // Try to limit which sets of keywords should be included in typo
+      // correction based on what the next token is.
+      DefaultValidator.WantTypeSpecifiers =
+          NextToken.is(tok::l_paren) || NextToken.is(tok::less) ||
+          NextToken.is(tok::identifier) || NextToken.is(tok::star) ||
+          NextToken.is(tok::amp) || NextToken.is(tok::l_square);
+      DefaultValidator.WantExpressionKeywords =
+          NextToken.is(tok::l_paren) || NextToken.is(tok::identifier) ||
+          NextToken.is(tok::arrow) || NextToken.is(tok::period);
+      DefaultValidator.WantRemainingKeywords =
+          NextToken.is(tok::l_paren) || NextToken.is(tok::semi) ||
+          NextToken.is(tok::identifier) || NextToken.is(tok::l_brace);
+      DefaultValidator.WantCXXNamedCasts = false;
       if (TypoCorrection Corrected = CorrectTypo(Result.getLookupNameInfo(),
                                                  Result.getLookupKind(), S, 
                                                  &SS, DefaultValidator)) {

test/SemaCXX/typo-correction.cpp

@@ -227,3 +227,10 @@ class foo { }; // expected-note{{'foo' declared here}}
 // 'boo' to 'bool' is the same edit distance as correcting 'boo' to 'foo'.
 class bar : boo { }; // expected-error{{unknown class name 'boo'; did you mean 'foo'?}}
 }
+
+namespace bogus_keyword_suggestion {
+void test() {
+   status = "OK"; // expected-error-re{{use of undeclared identifier 'status'$}}
+   return status; // expected-error-re{{use of undeclared identifier 'status'$}}
+ }
+}