aee4925507
Based on post-commit review discussion on 2bd84938470bf2e337801faafb8a67710f46429d with Richard Smith. Other uses of forcing HasEmptyPlaceHolder to false seem OK to me - they're all around pointer/reference types where the pointer/reference token will appear at the rightmost side of the left side of the type name, so they make nested types (eg: the "int" in "int *") behave as though there is a non-empty placeholder (because the "*" is essentially the placeholder as far as the "int" is concerned). This was originally committed in 277623f4d5a672d707390e2c3eaf30a9eb4b075c Reverted in f9ad1d1c775a8e264bebc15d75e0c6e5c20eefc7 due to breakages outside of clang - lldb seems to have some strange/strong dependence on "char [N]" versus "char[N]" when printing strings (not due to that name appearing in DWARF, but probably due to using clang to stringify type names) that'll need to be addressed, plus a few other odds and ends in other subprojects (clang-tools-extra, compiler-rt, etc).
23 lines
993 B
C++
23 lines
993 B
C++
// RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s
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template<class ... Types> void f(Types ... args);
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void test() {
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f();
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f(1);
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f(2, 1.0);
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}
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// Test simple recursive variadic function template
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template<typename Head, typename ...Tail>
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void recurse_until_fail(const Head &, const Tail &...tail) { // expected-note{{candidate function template not viable: requires at least 1 argument, but 0 were provided}}
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recurse_until_fail(tail...); // expected-error{{no matching function for call to 'recurse_until_fail'}} \
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// expected-note{{in instantiation of function template specialization 'recurse_until_fail<char[7]>' requested here}} \
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// expected-note{{in instantiation of function template specialization 'recurse_until_fail<double, char[7]>' requested here}}
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}
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void test_recurse_until_fail() {
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recurse_until_fail(1, 3.14159, "string"); // expected-note{{in instantiation of function template specialization 'recurse_until_fail<int, double, char[7]>' requested here}}
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}
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