llvm-capstone/clang/test/SemaCXX/lambda-pack-expansion.cpp
Ilya Biryukov 629170fe45 [Sema] Lambdas are not part of immediate context for deduction
This commit implements [temp.deduct]p9.
Test updates include:
- New notes in `cxx1y-init-captures.cpp`, `lambda-expressions.cpp`
  and 'warn-unused-lambda-capture.cpp'.
  This seems to be caused by diagnosing errors earlier (during
  deduction) that were previously surfaced later (during
  instantiation).
- New error `lambda-unevaluated.cpp` is in line with [temp.deduct]p9.

Reviewed By: erichkeane, #clang-language-wg

Differential Revision: https://reviews.llvm.org/D148802
2023-05-09 12:06:33 +02:00

24 lines
649 B
C++

// RUN: %clang_cc1 -std=c++20 -Wno-unused-value -fsyntax-only -verify %s
namespace GH49266 {
struct X {
X() = default;
X(X const&) = delete; // expected-note {{'X' has been explicitly marked deleted here}}
};
void take_by_copy(auto &...args) {
[...args = args] {}(); // expected-error {{call to deleted constructor}}
// expected-note@-1 {{substituting into a lambda}}
}
void take_by_ref(auto &...args) {
[&...args = args] {}(); // args is passed by reference and not copied.
}
void foo() {
X x;
take_by_copy(x); // expected-note {{in instantiation of function template specialization}}
take_by_ref(x);
}
}