1c50909f6f
This reverts commit f6dff93641b2259623e686eb13a1884b8b9f4a00. This diagnostic is also in the -Wcomment group, which is in the -Wall group, so the diagnostic is enabled in a wider context than GCC does. That turns out to be disruptive for the Linux kernel builds still using -std=gnu89 because the kernel requires C source files to start with // comments: https://kernel.org/doc/html/v5.18-rc5/process/license-rules.html#license-identifier-syntax
47 lines
2.2 KiB
C
47 lines
2.2 KiB
C
/* RUN: %clang_cc1 -std=c90 -fsyntax-only %s -verify -pedantic-errors
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*/
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enum { cast_hex = (long) (
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0x0p-1 /* expected-error {{hexadecimal floating constants are a C99 feature}} */
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) };
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/* PR2477 */
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int test1(int a,int b) {return a//* This is a divide followed by block comment in c89 mode */
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b;}
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// comment accepted as extension /* expected-error {{// comments are not allowed in this language}}
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void test2(void) {
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const char * str =
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"sdjflksdjf lksdjf skldfjsdkljflksdjf kldsjflkdsj fldks jflsdkjfds" // expected-error{{string literal of length 845 exceeds maximum length 509 that C90 compilers are required to support}}
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"sdjflksdjf lksdjf skldfjsdkljflksdjf kldsjflkdsj fldks jflsdkjfds"
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"sdjflksdjf lksdjf skldfjsdkljflksdjf kldsjflkdsj fldks jflsdkjfds"
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"sdjflksdjf lksdjf skldfjsdkljflksdjf kldsjflkdsj fldks jflsdkjfds"
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"sdjflksdjf lksdjf skldfjsdkljflksdjf kldsjflkdsj fldks jflsdkjfds"
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"sdjflksdjf lksdjf skldfjsdkljflksdjf kldsjflkdsj fldks jflsdkjfds"
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"sdjflksdjf lksdjf skldfjsdkljflksdjf kldsjflkdsj fldks jflsdkjfds"
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"sdjflksdjf lksdjf skldfjsdkljflksdjf kldsjflkdsj fldks jflsdkjfds"
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"sdjflksdjf lksdjf skldfjsdkljflksdjf kldsjflkdsj fldks jflsdkjfds"
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"sdjflksdjf lksdjf skldfjsdkljflksdjf kldsjflkdsj fldks jflsdkjfds"
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"sdjflksdjf lksdjf skldfjsdkljflksdjf kldsjflkdsj fldks jflsdkjfds"
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"sdjflksdjf lksdjf skldfjsdkljflksdjf kldsjflkdsj fldks jflsdkjfds"
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"sdjflksdjf lksdjf skldfjsdkljflksdjf kldsjflkdsj fldks jflsdkjfds";
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}
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void test3(void) {
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(void)L"\u1234"; // expected-error {{universal character names are only valid in C99 or C++}}
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(void)L'\u1234'; // expected-error {{universal character names are only valid in C99 or C++}}
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}
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#define PREFIX(x) foo ## x
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int test4(void) {
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int PREFIX(0p) = 0;
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int *p = &PREFIX(0p+1);
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return p[-1];
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}
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#define MY_UCN \u00FC // expected-warning {{universal character names are only valid in C99 or C++; treating as '\' followed by identifier}}
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#define NOT_A_UCN \h // no-warning
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extern int idWithUCN\u00FC; // expected-warning {{universal character names are only valid in C99 or C++; treating as '\' followed by identifier}} expected-error {{expected ';'}}
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