c86c815fc5
C++23 mandates that temporaries used in range-based for loops are lifetime-extended to cover the full loop. This patch adds a check for loop variables and compiler- generated `__range` bindings to apply the correct extension. Includes test cases based on examples from CWG900/P2644R1. Fixes https://github.com/llvm/llvm-project/issues/109793
28 lines
507 B
C++
28 lines
507 B
C++
// RUN: %clang_cc1 -std=c++23 -fsyntax-only -verify %s
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using size_t = decltype(sizeof(void *));
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namespace std {
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template <typename T> struct vector {
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T &operator[](size_t I);
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};
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struct string {
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const char *begin();
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const char *end();
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};
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} // namespace std
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std::vector<std::string> getData();
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void foo() {
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// Verifies we don't trigger a diagnostic from -Wdangling-gsl
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// when iterating over a temporary in C++23.
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for (auto c : getData()[0]) {
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(void)c;
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}
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}
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// expected-no-diagnostics
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