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PR4353: Add support for \E as a character escape.

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llvm-svn: 73153
This commit is contained in:
Eli Friedman
2009-06-10 01:32:39 +00:00
parent 06039d1190
commit 28a00aa646
2 changed files with 25 additions and 1 deletions
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5
clang/lib/Lex/LiteralSupport.cpp
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@@ -56,6 +56,10 @@ static unsigned ProcessCharEscape(const char *&ThisTokBuf,
PP.Diag(Loc, diag::ext_nonstandard_escape) << "e";
ResultChar = 27;
break;
case 'E':
PP.Diag(Loc, diag::ext_nonstandard_escape) << "E";
ResultChar = 27;
break;
case 'f':
ResultChar = 12;
break;
@@ -135,7 +139,6 @@ static unsigned ProcessCharEscape(const char *&ThisTokBuf,
PP.Diag(Loc, diag::ext_nonstandard_escape)
<< std::string()+(char)ResultChar;
break;
// FALL THROUGH.
default:
if (isgraph(ThisTokBuf[0]))
PP.Diag(Loc, diag::ext_unknown_escape) << std::string()+(char)ResultChar;

21
clang/test/Lexer/char-escapes.c Normal file
View File

@@ -0,0 +1,21 @@
// RUN: clang-cc -fsyntax-only -pedantic -verify %s
int test['\\' == 92 ? 1 : -1];
int test['\"' == 34 ? 1 : -1];
int test['\'' == 39 ? 1 : -1];
int test['\?' == 63 ? 1 : -1];
int test['\a' == 7 ? 1 : -1];
int test['\b' == 8 ? 1 : -1];
int test['\e' == 27 ? 1 : -1]; // expected-warning {{non-standard escape}}
int test['\E' == 27 ? 1 : -1]; // expected-warning {{non-standard escape}}
int test['\f' == 12 ? 1 : -1];
int test['\n' == 10 ? 1 : -1];
int test['\r' == 13 ? 1 : -1];
int test['\t' == 9 ? 1 : -1];
int test['\v' == 11 ? 1 : -1];
int test['\xa' == 10 ? 1 : -1];
int test['\1' == 1 ? 1 : -1];
int test['\(' == 40 ? 1 : -1]; // expected-warning {{non-standard escape}}
int test['\{' == 123 ? 1 : -1]; // expected-warning {{non-standard escape}}
int test['\[' == 91 ? 1 : -1]; // expected-warning {{non-standard escape}}
int test['\%' == 37 ? 1 : -1]; // expected-warning {{non-standard escape}}