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977026c5f5
When x is empty, x ## is suppressed, and when y gets expanded, the fact that it follows ## is not available in the macro expansion result. The macro definition can be checked instead, the ## will be available there regardless of what x expands to. Fixes http://llvm.org/PR12767 Patch by Harald van Dijk! llvm-svn: 182699
18 lines
281 B
C
18 lines
281 B
C
// RUN: %clang_cc1 -E %s | FileCheck --strict-whitespace %s
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#define FOO(X) X ## Y
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a:FOO()
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// CHECK: a:Y
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#define FOO2(X) Y ## X
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b:FOO2()
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// CHECK: b:Y
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#define FOO3(X) X ## Y ## X ## Y ## X ## X
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c:FOO3()
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// CHECK: c:YY
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#define FOO4(X, Y) X ## Y
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d:FOO4(,FOO4(,))
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// CHECK: d:FOO4
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