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
41 lines
1.0 KiB
C++
41 lines
1.0 KiB
C++
// RUN: %clang_cc1 -std=c++11 %s -Wunused -Wno-unused-lambda-capture -verify
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struct X {
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X(const X&) = delete; // expected-note 2{{explicitly marked deleted}}
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X(X&);
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};
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void test_capture(X x) {
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[x] { }(); // okay: non-const copy ctor
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[x] {
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[x] { // expected-error{{call to deleted constructor of 'X'}}
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}();
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}();
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[x] {
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[&x] {
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[x] { // expected-error{{call to deleted constructor of 'const X'}}
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}();
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}();
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}();
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int a;
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[=]{
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[&] {
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int &x = a; // expected-error{{binding value of type 'const int' to reference to type 'int' drops 'const' qualifier}}
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int &x2 = a; // expected-error{{binding value of type 'const int' to reference to type 'int' drops 'const' qualifier}}
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}();
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}();
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[=]{
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[&a] {
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[&] {
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int &x = a; // expected-error{{binding value of type 'const int' to reference to type 'int' drops 'const' qualifier}}
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int &x2 = a; // expected-error{{binding value of type 'const int' to reference to type 'int' drops 'const' qualifier}}
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}();
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}();
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}();
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}
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