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The attributes changes were left out of Clang 17. Attributes that used to take a string literal now accept an unevaluated string literal instead, which means they reject numeric escape sequences and strings literal with an encoding prefix - but the later was already ill-formed in most cases. We need to know that we are going to parse an unevaluated string literal before we do - so we can reject numeric escape sequence, so we derive from Attrs.td which attributes parameters are expected to be string literals. Reviewed By: aaron.ballman Differential Revision: https://reviews.llvm.org/D156237
41 lines
1.6 KiB
C
41 lines
1.6 KiB
C
// RUN: %clang_cc1 -fsyntax-only -verify %s
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#if !__has_attribute(error)
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#error "error attribute missing"
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#endif
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__attribute__((error("don't call me!"))) int good0(void);
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__attribute__((error)) // expected-error {{'error' attribute takes one argument}}
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int
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bad0(void);
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int bad1(__attribute__((error("bad1"))) int param); // expected-error {{'error' attribute only applies to functions}}
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int bad2(void) {
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__attribute__((error("bad2"))); // expected-error {{'error' attribute cannot be applied to a statement}}
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}
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__attribute__((error(3))) // expected-error {{expected string literal as argument of 'error' attribute}}
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int
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bad3(void);
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__attribute__((error("foo"), error("foo"))) int good1(void);
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__attribute__((error("foo"))) int good1(void);
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__attribute__((error("foo"))) int good1(void) {}
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__attribute__((error("foo"), warning("foo"))) // expected-error {{'warning' and 'error' attributes are not compatible}}
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int
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bad4(void);
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// expected-note@-3 {{conflicting attribute is here}}
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__attribute__((error("foo"))) int bad5(void); // expected-note {{conflicting attribute is here}}
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__attribute__((warning("foo"))) int bad5(void); // expected-error {{'error' and 'warning' attributes are not compatible}}
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/*
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* Note: we differ from GCC here; rather than support redeclarations that add
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* or remove this fn attr, we diagnose such differences.
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*/
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void foo(void); // expected-note {{previous declaration is here}}
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__attribute__((error("oh no foo"))) void foo(void); // expected-error {{'error' attribute does not appear on the first declaration}}
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