llvm-project/clang/test/SemaCXX/cxx0x-constexpr-const.cpp

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C++

// RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s
constexpr int x = 1; // expected-note {{variable 'x' declared const here}}
constexpr int id(int x) { return x; }
void foo(void) {
x = 2; // expected-error {{cannot assign to variable 'x' with const-qualified type 'const int'}}
int (*idp)(int) = id;
}