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llvm-project/clang/test/Sema/pr32985.c

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[SEMA] split ExtWarn dupl-decl-spec's into Extension and ExtWarn Summary: For types deduced from typedef's and typeof's, don't warn for duplicate declaration specifiers in C90 unless -pedantic. Create a third diagnostic type for duplicate declaration specifiers. Previously, we had an ExtWarn and a Warning. This change adds a third, Extension, which only warns when -pedantic is set, staying silent otherwise. Fixes PR32985. Reviewers: rsmith Reviewed By: rsmith Subscribers: srhines, cfe-commits Differential Revision: https://reviews.llvm.org/D52849 llvm-svn: 343740
2018-10-04 07:09:29 +08:00
/*
RUN: %clang_cc1 %s -std=gnu89 -fsyntax-only 2>&1 | FileCheck -check-prefix=CHECK-GNU89 %s -allow-empty
RUN: %clang_cc1 %s -std=gnu89 -pedantic -fsyntax-only 2>&1 | FileCheck -check-prefix=CHECK-GNU89-PEDANTIC %s
*/
typedef const int t;
const t c_i;
/*
CHECK-GNU89-NOT: 7:1: warning: duplicate 'const' declaration specifier
CHECK-GNU89-PEDANTIC: 7:1: warning: duplicate 'const' declaration specifier
*/
const int c_i2;
const typeof(c_i2) c_i3;
/*
CHECK-GNU89-NOT: 14:7: warning: extension used
CHECK-GNU89-NOT: 14:1: warning: duplicate 'const' declaration specifier
CHECK-GNU89-PEDANTIC: 14:7: warning: extension used
CHECK-GNU89-PEDANTIC: 14:1: warning: duplicate 'const' declaration specifier
*/