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// Test lambda mangling
// { dg-do compile { target c++11 } }
// { dg-require-weak "" }
// { dg-options "-fno-inline" }
template<typename F> int algo(F fn) { return fn(); }
inline void g(int n) {
int bef(int i = []{ return 1; }());
// Default arguments of block-extern function declarations
// remain in the context of the encloding function body.
// The closure type is encoded as Z1giEUlvE_.
// The call operator of that type is _ZZ1giENKUlvE_clEv.
// { dg-final { scan-assembler "_ZZ1giENKUlvE_clEv" } }
// { dg-final { scan-assembler "weak\[^\n\r\]*_?_ZZ1giENKUlvE_clEv" { target { ! { *-*-darwin* *-*-mingw* *-*-cygwin } } } } }
algo([=]{return n+bef();});
// The captured entities do not participate in <lambda-sig>
// and so this closure type has the same <lambda-sig> as
// the previous one. It encoding is therefore Z1giEUlvE0_
// and the call operator is _ZZ1giENKUlvE0_clEv. The
// instance of "algo" being called is then
// _Z4algoIZ1giEUlvE0_EiT_.
// { dg-final { scan-assembler "_Z4algoIZ1giEUlvE0_EiT_" } }
// { dg-final { scan-assembler "_ZZ1giENKUlvE0_clEv" } }
int i = []{return 1;}();
}
struct S {
void f(int =
// Type: ZN1S1fEiiEd0_UlvE_
// Operator: _ZZN1S1fEiiEd0_NKUlvE_clEv
// { dg-final { scan-assembler "_ZZN1S1fEiiEd0_NKUlvE_clEv" } }
// { dg-final { scan-assembler "weak\[^\n\r\]*_?_ZZN1S1fEiiEd0_NKUlvE_clEv" { target { ! { *-*-darwin* *-*-mingw* *-*-cygwin } } } } }
[]{return 1;}()
// Type: ZN1S1fEiiEd0_UlvE0_
// Operator: _ZZN1S1fEiiEd0_NKUlvE0_clEv
// { dg-final { scan-assembler "_ZZN1S1fEiiEd0_NKUlvE0_clEv" } }
+ []{return 2;}(),
int =
// Type: ZN1S1fEiiEd_UlvE_
// Operator: _ZZN1S1fEiiEd_NKUlvE_clEv
// { dg-final { scan-assembler "_ZZN1S1fEiiEd_NKUlvE_clEv" } }
[]{return 3;}());
};
void bar()
{
// lambdas in non-vague linkage functions have internal linkage.
// { dg-final { scan-assembler-not "weak\[^\n\r\]*bar\[^\n\r\]*Ul" } }
[]{}();
}
// lambdas used in namespace-scope initializers have the linkage of
// the decl
// { dg-final { scan-assembler-not "weak\[^\n\r\]*_ZNKUlv" } }
// { dg-final { scan-assembler "weak\[^\n\r\]*variableMUlvE_clEv" { target c++14_down } } }
// in c++17 and up, this operator() become constexpr, no not emitted
// { dg-final { scan-assembler-not "weak\[^\n\r\]*variableMUlvE_clEv" { target c++17 } } }
int variable = []{return 1;}();
// And a template instantiated with such a lambda is also internal.
// { dg-final { scan-assembler-not "weak\[^\n\r\]*algoIUl" } }
int var2 = algo([]{return 1;});
// As are lambdas used in non-class-body default arguments.
// { dg-final { scan-assembler-not "weak\[^\n\r\]*function" } }
void function (int i = []{return 1;}()+[]{return 1;}());
struct Foo
{
static int Int;
void Bar(int);
};
int Foo::Int = []{return 1;}();
// Even default arguments for member functions that appear outside the
// class body are internal.
// { dg-final { scan-assembler-not "weak\[^\n\r\]*Foo" } }
void Foo::Bar(int i = []{return 1;}()) {}
// Even default arguments for function templates.
// { dg-final { scan-assembler-not "weak\[^\n\r\]*fn2\[^\n\r\]*Ulv" } }
template <class T>
void fn2 (T t = []{return 1;}()) {}
int main()
{
g(42);
S().f();
function();
Foo().Bar();
fn2<int>();
}
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