87a036259b
Summary: Warn when a lambda explicitly captures something that is not used in its body. The warning is part of -Wunused and can be enabled with -Wunused-lambda-capture. Reviewers: rsmith, arphaman, jbcoe, aaron.ballman Subscribers: Quuxplusone, arphaman, cfe-commits Differential Revision: https://reviews.llvm.org/D28467 llvm-svn: 291905
17 lines
748 B
C++
17 lines
748 B
C++
// RUN: %clang_cc1 -std=c++11 %s -Wunused -Wno-unused-lambda-capture -verify
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void f2() {
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int i = 1;
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void g1(int = ([i]{ return i; })()); // expected-error{{lambda expression in default argument cannot capture any entity}}
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void g2(int = ([i]{ return 0; })()); // expected-error{{lambda expression in default argument cannot capture any entity}}
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void g3(int = ([=]{ return i; })()); // expected-error{{lambda expression in default argument cannot capture any entity}}
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void g4(int = ([=]{ return 0; })());
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void g5(int = ([]{ return sizeof i; })());
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}
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namespace lambda_in_default_args {
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int f(int = [] () -> int { int n; return ++n; } ());
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template<typename T> T g(T = [] () -> T { T n; return ++n; } ());
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int k = f() + g<int>();
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}
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