132 lines
3.1 KiB
C++
132 lines
3.1 KiB
C++
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// RUN: %clang_cc1 -fsyntax-only -verify %s -std=c++1y -DCXX1Y
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namespace test_factorial {
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auto Fact = [](auto Self, unsigned n) -> unsigned {
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return !n ? 1 : Self(Self, n - 1) * n;
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};
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auto six = Fact(Fact, 3);
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}
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namespace overload_generic_lambda {
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template <class F1, class F2> struct overload : F1, F2 {
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using F1::operator();
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using F2::operator();
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overload(F1 f1, F2 f2) : F1(f1), F2(f2) { }
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};
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auto NumParams = [](auto Self, auto h, auto ... rest) -> unsigned {
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return 1 + Self(Self, rest...);
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};
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auto Base = [](auto Self, auto h) -> unsigned {
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return 1;
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};
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overload<decltype(Base), decltype(NumParams)> O(Base, NumParams);
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int num_params = O(O, 5, 3, "abc", 3.14, 'a');
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}
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namespace overload_generic_lambda_return_type_deduction {
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template <class F1, class F2> struct overload : F1, F2 {
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using F1::operator();
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using F2::operator();
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overload(F1 f1, F2 f2) : F1(f1), F2(f2) { }
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};
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auto NumParams = [](auto Self, auto h, auto ... rest) {
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return 1 + Self(Self, rest...);
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};
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auto Base = [](auto Self, auto h) {
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return 1;
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};
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overload<decltype(Base), decltype(NumParams)> O(Base, NumParams);
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int num_params = O(O, 5, 3, "abc", 3.14, 'a');
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}
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namespace test_standard_p5 {
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// FIXME: This test should eventually compile without an explicit trailing return type
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auto glambda = [](auto a, auto&& b) ->bool { return a < b; };
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bool b = glambda(3, 3.14); // OK
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}
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namespace test_deduction_failure {
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int test() {
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auto g = [](auto *a) { //expected-note{{candidate template ignored}}
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return a;
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};
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struct X { };
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X *x;
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g(x);
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g(3); //expected-error{{no matching function}}
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return 0;
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}
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}
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namespace test_instantiation_or_sfinae_failure {
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int test2() {
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{
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auto L = [](auto *a) {
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return (*a)(a); }; //expected-error{{called object type 'double' is not a function}}
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double d;
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L(&d); //expected-note{{in instantiation of}}
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auto M = [](auto b) { return b; };
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L(&M); // ok
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}
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{
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auto L = [](auto *a) ->decltype (a->foo()) { //expected-note2{{candidate template ignored:}}
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return (*a)(a); };
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double d;
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L(&d); //expected-error{{no matching function for call}}
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auto M = [](auto b) { return b; };
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L(&M); //expected-error{{no matching function for call}}
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}
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return 0;
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}
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}
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namespace test_misc {
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auto GL = [](auto a, decltype(a) b) //expected-note{{candidate function}}
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-> int { return a + b; };
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void test() {
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struct X { };
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GL(3, X{}); //expected-error{{no matching function}}
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}
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void test2() {
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auto l = [](auto *a) -> int {
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(*a)(a); return 0; }; //expected-error{{called object type 'double' is not a function}}
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l(&l);
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double d;
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l(&d); //expected-note{{in instantiation of}}
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}
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}
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namespace nested_lambdas {
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int test() {
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auto L = [](auto a) {
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return [=](auto b) {
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return a + b;
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};
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};
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}
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auto get_lambda() {
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return [](auto a) {
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return a;
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};
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};
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int test2() {
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auto L = get_lambda();
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L(3);
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}
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}
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