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864b810739
It's beneficial when compiling to treat // as the start of a line comment even in -std=c89 mode, since it's not valid C code (with a few rare exceptions) and is usually intended as such. We emit a pedantic warning and then continue on as if line comments were enabled. This has been our behavior for quite some time. However, people use the preprocessor for things besides C source files. In today's prompting example, the input contains (unquoted) URLs, which contain // but should still be preserved. This change instructs the lexer to treat // as a plain token if Clang is in C90 mode and generating preprocessed output rather than actually compiling. <rdar://problem/13338743> llvm-svn: 176526
16 lines
497 B
C
16 lines
497 B
C
/* RUN: %clang_cc1 %s -std=c89 -Eonly -verify -pedantic-errors
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* RUN: %clang_cc1 %s -std=c89 -E | FileCheck %s
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*/
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/* PR3919 */
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#define foo`bar /* expected-error {{whitespace required after macro name}} */
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#define foo2!bar /* expected-warning {{whitespace recommended after macro name}} */
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#define foo3$bar /* expected-error {{'$' in identifier}} */
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/* CHECK-NOT: this comment should be missing
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* CHECK: {{^}}// this comment should be present{{$}}
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*/
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// this comment should be present
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