1379 lines
28 KiB
C++
1379 lines
28 KiB
C++
// RUN: %clang_cc1 -std=c++1y -verify -fsyntax-only -fblocks -emit-llvm-only %s
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// DONTRUNYET: %clang_cc1 -std=c++1y -verify -fsyntax-only -fblocks -fdelayed-template-parsing %s -DDELAYED_TEMPLATE_PARSING
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// DONTRUNYET: %clang_cc1 -std=c++1y -verify -fsyntax-only -fblocks -fms-extensions %s -DMS_EXTENSIONS
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// DONTRUNYET: %clang_cc1 -std=c++1y -verify -fsyntax-only -fblocks -fdelayed-template-parsing -fms-extensions %s -DMS_EXTENSIONS -DDELAYED_TEMPLATE_PARSING
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constexpr int ODRUSE_SZ = sizeof(char);
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template<class T, int N>
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void f(T, const int (&)[N]) { }
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template<class T>
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void f(const T&, const int (&)[ODRUSE_SZ]) { }
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#define DEFINE_SELECTOR(x) \
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int selector_ ## x[sizeof(x) == ODRUSE_SZ ? ODRUSE_SZ : ODRUSE_SZ + 5]
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#define F_CALL(x, a) f(x, selector_ ## a)
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// This is a risky assumption, because if an empty class gets captured by value
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// the lambda's size will still be '1'
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#define ASSERT_NO_CAPTURES(L) static_assert(sizeof(L) == 1, "size of closure with no captures must be 1")
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#define ASSERT_CLOSURE_SIZE_EXACT(L, N) static_assert(sizeof(L) == (N), "size of closure must be " #N)
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#define ASSERT_CLOSURE_SIZE(L, N) static_assert(sizeof(L) >= (N), "size of closure must be >=" #N)
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namespace sample {
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struct X {
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int i;
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X(int i) : i(i) { }
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};
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}
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namespace test_transformations_in_templates {
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template<class T> void foo(T t) {
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auto L = [](auto a) { return a; };
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}
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template<class T> void foo2(T t) {
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auto L = [](auto a) -> void {
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auto M = [](char b) -> void {
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auto N = [](auto c) -> void {
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int selector[sizeof(c) == 1 ?
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(sizeof(b) == 1 ? 1 : 2)
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: 2
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]{};
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};
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N('a');
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};
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};
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L(3.14);
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}
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void doit() {
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foo(3);
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foo('a');
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foo2('A');
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}
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}
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namespace test_return_type_deduction {
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void doit() {
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auto L = [](auto a, auto b) {
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if ( a > b ) return a;
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return b;
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};
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L(2, 4);
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{
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auto L2 = [](auto a, int i) {
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return a + i;
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};
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L2(3.14, 2);
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}
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{
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int a; //expected-note{{declared here}}
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auto B = []() { return ^{ return a; }; }; //expected-error{{cannot be implicitly capture}}\
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//expected-note{{begins here}}
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//[](){ return ({int b = 5; return 'c'; 'x';}); };
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//auto X = ^{ return a; };
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//auto Y = []() -> auto { return 3; return 'c'; };
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}
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}
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}
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namespace test_no_capture{
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void doit() {
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const int x = 10; //expected-note{{declared here}}
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{
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// should not capture 'x' - variable undergoes lvalue-to-rvalue
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auto L = [=](auto a) {
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int y = x;
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return a + y;
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};
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ASSERT_NO_CAPTURES(L);
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}
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{
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// should not capture 'x' - even though certain instantiations require
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auto L = [](auto a) { //expected-note{{begins here}}
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DEFINE_SELECTOR(a);
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F_CALL(x, a); //expected-error{{'x' cannot be implicitly captured}}
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};
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ASSERT_NO_CAPTURES(L);
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L('s'); //expected-note{{in instantiation of}}
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}
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{
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// Does not capture because no default capture in inner most lambda 'b'
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auto L = [=](auto a) {
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return [=](int p) {
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return [](auto b) {
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DEFINE_SELECTOR(a);
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F_CALL(x, a);
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return 0;
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};
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};
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};
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ASSERT_NO_CAPTURES(L);
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}
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} // doit
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} // namespace
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namespace test_capture_of_potentially_evaluated_expression {
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void doit() {
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const int x = 5;
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{
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auto L = [=](auto a) {
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DEFINE_SELECTOR(a);
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F_CALL(x, a);
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};
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static_assert(sizeof(L) == 4, "Must be captured");
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}
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{
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int j = 0; //expected-note{{declared}}
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auto L = [](auto a) { //expected-note{{begins here}}
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return j + 1; //expected-error{{cannot be implicitly captured}}
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};
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}
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{
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const int x = 10;
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auto L = [](auto a) {
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//const int y = 20;
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return [](int p) {
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return [](auto b) {
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DEFINE_SELECTOR(a);
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F_CALL(x, a);
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return 0;
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};
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};
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};
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auto M = L(3);
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auto N = M(5);
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}
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{ // if the nested capture does not implicitly or explicitly allow any captures
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// nothing should capture - and instantiations will create errors if needed.
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const int x = 0;
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auto L = [=](auto a) { // <-- #A
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const int y = 0;
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return [](auto b) { // <-- #B
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int c[sizeof(b)];
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f(x, c);
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f(y, c);
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int i = x;
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};
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};
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ASSERT_NO_CAPTURES(L);
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auto M_int = L(2);
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ASSERT_NO_CAPTURES(M_int);
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}
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{ // Permutations of this example must be thoroughly tested!
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const int x = 0;
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sample::X cx{5};
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auto L = [=](auto a) {
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const int z = 3;
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return [&,a](auto b) {
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const int y = 5;
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return [=](auto c) {
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int d[sizeof(a) == sizeof(c) || sizeof(c) == sizeof(b) ? 2 : 1];
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f(x, d);
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f(y, d);
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f(z, d);
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decltype(a) A = a;
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decltype(b) B = b;
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const int &i = cx.i;
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};
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};
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};
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auto M = L(3)(3.5);
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M(3.14);
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}
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}
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namespace Test_no_capture_of_clearly_no_odr_use {
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auto foo() {
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const int x = 10;
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auto L = [=](auto a) {
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return [=](auto b) {
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return [=](auto c) {
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int A = x;
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return A;
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};
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};
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};
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auto M = L(1);
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auto N = M(2.14);
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ASSERT_NO_CAPTURES(L);
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ASSERT_NO_CAPTURES(N);
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return 0;
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}
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}
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namespace Test_capture_of_odr_use_var {
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auto foo() {
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const int x = 10;
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auto L = [=](auto a) {
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return [=](auto b) {
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return [=](auto c) {
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int A = x;
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const int &i = x;
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decltype(a) A2 = a;
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return A;
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};
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};
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};
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auto M_int = L(1);
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auto N_int_int = M_int(2);
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ASSERT_CLOSURE_SIZE_EXACT(L, sizeof(x));
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// M_int captures both a & x
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ASSERT_CLOSURE_SIZE_EXACT(M_int, sizeof(x) + sizeof(int));
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// N_int_int captures both a & x
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ASSERT_CLOSURE_SIZE_EXACT(N_int_int, sizeof(x) + sizeof(int));
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auto M_double = L(3.14);
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ASSERT_CLOSURE_SIZE(M_double, sizeof(x) + sizeof(double));
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return 0;
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}
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auto run = foo();
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}
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}
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namespace more_nested_captures_1 {
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template<class T> struct Y {
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static void f(int, double, ...) { }
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template<class R>
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static void f(const int&, R, ...) { }
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template<class R>
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void foo(R t) {
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const int x = 10; //expected-note{{declared here}}
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auto L = [](auto a) {
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return [=](auto b) {
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return [=](auto c) {
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f(x, c, b, a); //expected-error{{reference to local variable 'x'}}
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return 0;
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};
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};
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};
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auto M = L(t);
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auto N = M('b');
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N(3.14);
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N(5); //expected-note{{in instantiation of}}
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}
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};
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Y<int> yi;
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int run = (yi.foo(3.14), 0); //expected-note{{in instantiation of}}
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}
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namespace more_nested_captures_1_1 {
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template<class T> struct Y {
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static void f(int, double, ...) { }
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template<class R>
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static void f(const int&, R, ...) { }
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template<class R>
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void foo(R t) {
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const int x = 10; //expected-note{{declared here}}
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auto L = [](auto a) {
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return [=](char b) {
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return [=](auto c) {
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f(x, c, b, a); //expected-error{{reference to local variable 'x'}}
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return 0;
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};
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};
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};
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auto M = L(t);
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auto N = M('b');
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N(3.14);
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N(5); //expected-note{{in instantiation of}}
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}
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};
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Y<int> yi;
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int run = (yi.foo(3.14), 0); //expected-note{{in instantiation of}}
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}
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namespace more_nested_captures_1_2 {
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template<class T> struct Y {
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static void f(int, double, ...) { }
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template<class R>
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static void f(const int&, R, ...) { }
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template<class R>
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void foo(R t) {
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const int x = 10;
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auto L = [=](auto a) {
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return [=](char b) {
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return [=](auto c) {
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f(x, c, b, a);
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return 0;
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};
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};
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};
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auto M = L(t);
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auto N = M('b');
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N(3.14);
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N(5);
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}
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};
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Y<int> yi;
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int run = (yi.foo(3.14), 0);
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}
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namespace more_nested_captures_1_3 {
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template<class T> struct Y {
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static void f(int, double, ...) { }
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template<class R>
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static void f(const int&, R, ...) { }
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template<class R>
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void foo(R t) {
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const int x = 10; //expected-note{{declared here}}
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auto L = [=](auto a) {
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return [](auto b) {
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const int y = 0;
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return [=](auto c) {
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f(x, c, b); //expected-error{{reference to local variable 'x'}}
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f(y, b, c);
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return 0;
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};
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};
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};
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auto M = L(t);
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auto N = M('b');
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N(3.14);
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N(5); //expected-note{{in instantiation of}}
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}
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};
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Y<int> yi;
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int run = (yi.foo(3.14), 0); //expected-note{{in instantiation of}}
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}
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namespace more_nested_captures_1_4 {
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template<class T> struct Y {
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static void f(int, double, ...) { }
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template<class R>
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static void f(const int&, R, ...) { }
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template<class R>
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void foo(R t) {
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const int x = 10; //expected-note{{declared here}}
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auto L = [=](auto a) {
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T t2{t};
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return [](auto b) {
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const int y = 0; //expected-note{{declared here}}
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return [](auto c) { //expected-note 2{{lambda expression begins here}}
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f(x, c); //expected-error{{variable 'x'}}
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f(y, c); //expected-error{{variable 'y'}}
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return 0;
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};
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};
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};
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auto M = L(t);
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auto N_char = M('b');
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N_char(3.14);
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auto N_double = M(3.14);
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N_double(3.14);
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N_char(3); //expected-note{{in instantiation of}}
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}
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};
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Y<int> yi;
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int run = (yi.foo('a'), 0); //expected-note{{in instantiation of}}
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}
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namespace more_nested_captures_2 {
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template<class T> struct Y {
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static void f(int, double) { }
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template<class R>
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static void f(const int&, R) { }
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template<class R>
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void foo(R t) {
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const int x = 10;
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auto L = [=](auto a) {
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return [=](auto b) {
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return [=](auto c) {
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f(x, c);
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return 0;
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};
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};
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};
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auto M = L(t);
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auto N = M('b');
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N(3);
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N(3.14);
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}
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};
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Y<int> yi;
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int run = (yi.foo(3.14), 0);
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}
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namespace more_nested_captures_3 {
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template<class T> struct Y {
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static void f(int, double) { }
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template<class R>
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static void f(const int&, R) { }
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template<class R>
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void foo(R t) {
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const int x = 10; //expected-note{{declared here}}
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auto L = [](auto a) {
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return [=](auto b) {
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return [=](auto c) {
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f(x, c); //expected-error{{reference to local variable 'x'}}
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return 0;
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};
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};
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};
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auto M = L(t);
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auto N = M('b');
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N(3); //expected-note{{in instantiation of}}
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N(3.14);
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}
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};
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Y<int> yi;
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int run = (yi.foo(3.14), 0); //expected-note{{in instantiation of}}
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}
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namespace more_nested_captures_4 {
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template<class T> struct Y {
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static void f(int, double) { }
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template<class R>
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static void f(const int&, R) { }
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template<class R>
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void foo(R t) {
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const int x = 10; //expected-note{{'x' declared here}}
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auto L = [](auto a) {
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return [=](char b) {
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return [=](auto c) {
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f(x, c); //expected-error{{reference to local variable 'x'}}
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return 0;
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};
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};
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};
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auto M = L(t);
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auto N = M('b');
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N(3); //expected-note{{in instantiation of}}
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N(3.14);
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}
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};
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Y<int> yi;
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int run = (yi.foo(3.14), 0); //expected-note{{in instantiation of}}
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}
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namespace more_nested_captures_5 {
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template<class T> struct Y {
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static void f(int, double) { }
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template<class R>
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static void f(const int&, R) { }
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template<class R>
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void foo(R t) {
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const int x = 10;
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auto L = [=](auto a) {
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return [=](char b) {
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return [=](auto c) {
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f(x, c);
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return 0;
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};
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};
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};
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auto M = L(t);
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auto N = M('b');
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N(3);
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N(3.14);
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}
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};
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Y<int> yi;
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int run = (yi.foo(3.14), 0);
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}
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namespace lambdas_in_NSDMIs {
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template<class T>
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struct L {
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T t{};
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T t2 = ([](auto a) { return [](auto b) { return b; };})(t)(t);
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T t3 = ([](auto a) { return a; })(t);
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};
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L<int> l;
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int run = l.t2;
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}
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namespace test_nested_decltypes_in_trailing_return_types {
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int foo() {
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auto L = [](auto a) {
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return [](auto b, decltype(a) b2) -> decltype(a) {
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return decltype(a){};
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};
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};
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auto M = L(3.14);
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M('a', 6.26);
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return 0;
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}
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}
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namespace more_this_capture_1 {
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struct X {
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void f(int) { }
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static void f(double) { }
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void foo() {
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{
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auto L = [=](auto a) {
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f(a);
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};
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L(3);
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L(3.13);
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}
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{
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auto L = [](auto a) {
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f(a); //expected-error{{this}}
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};
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L(3.13);
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L(2); //expected-note{{in instantiation}}
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}
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}
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|
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int g() {
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auto L = [=](auto a) {
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return [](int i) {
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return [=](auto b) {
|
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f(b);
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int x = i;
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};
|
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};
|
|
};
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|
auto M = L(0.0);
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auto N = M(3);
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|
N(5.32); // OK
|
|
return 0;
|
|
}
|
|
};
|
|
int run = X{}.g();
|
|
}
|
|
namespace more_this_capture_1_1 {
|
|
struct X {
|
|
void f(int) { }
|
|
static void f(double) { }
|
|
|
|
int g() {
|
|
auto L = [=](auto a) {
|
|
return [](int i) {
|
|
return [=](auto b) {
|
|
f(decltype(a){}); //expected-error{{this}}
|
|
int x = i;
|
|
};
|
|
};
|
|
};
|
|
auto M = L(0.0);
|
|
auto N = M(3);
|
|
N(5.32); // OK
|
|
L(3); // expected-note{{instantiation}}
|
|
return 0;
|
|
}
|
|
};
|
|
int run = X{}.g();
|
|
}
|
|
|
|
namespace more_this_capture_1_1_1 {
|
|
struct X {
|
|
void f(int) { }
|
|
static void f(double) { }
|
|
|
|
int g() {
|
|
auto L = [=](auto a) {
|
|
return [](auto b) {
|
|
return [=](int i) {
|
|
f(b);
|
|
f(decltype(a){}); //expected-error{{this}}
|
|
};
|
|
};
|
|
};
|
|
auto M = L(0.0); // OK
|
|
auto N = M(3.3); //OK
|
|
auto M_int = L(0); //expected-note{{instantiation}}
|
|
return 0;
|
|
}
|
|
};
|
|
int run = X{}.g();
|
|
}
|
|
|
|
|
|
namespace more_this_capture_1_1_1_1 {
|
|
struct X {
|
|
void f(int) { }
|
|
static void f(double) { }
|
|
|
|
int g() {
|
|
auto L = [=](auto a) {
|
|
return [](auto b) {
|
|
return [=](int i) {
|
|
f(b); //expected-error{{this}}
|
|
f(decltype(a){});
|
|
};
|
|
};
|
|
};
|
|
auto M_double = L(0.0); // OK
|
|
auto N = M_double(3); //expected-note{{instantiation}}
|
|
|
|
return 0;
|
|
}
|
|
};
|
|
int run = X{}.g();
|
|
}
|
|
|
|
namespace more_this_capture_2 {
|
|
struct X {
|
|
void f(int) { }
|
|
static void f(double) { }
|
|
|
|
int g() {
|
|
auto L = [=](auto a) {
|
|
return [](int i) {
|
|
return [=](auto b) {
|
|
f(b); //expected-error{{'this' cannot}}
|
|
int x = i;
|
|
};
|
|
};
|
|
};
|
|
auto M = L(0.0);
|
|
auto N = M(3);
|
|
N(5); // NOT OK expected-note{{in instantiation of}}
|
|
return 0;
|
|
}
|
|
};
|
|
int run = X{}.g();
|
|
}
|
|
namespace diagnose_errors_early_in_generic_lambdas {
|
|
|
|
int foo()
|
|
{
|
|
|
|
{ // This variable is used and must be caught early, do not need instantiation
|
|
const int x = 0; //expected-note{{declared}}
|
|
auto L = [](auto a) { //expected-note{{begins}}
|
|
const int &r = x; //expected-error{{variable}}
|
|
};
|
|
}
|
|
{ // This variable is not used
|
|
const int x = 0;
|
|
auto L = [](auto a) {
|
|
int i = x;
|
|
};
|
|
}
|
|
{
|
|
|
|
const int x = 0; //expected-note{{declared}}
|
|
auto L = [=](auto a) { // <-- #A
|
|
const int y = 0;
|
|
return [](auto b) { //expected-note{{begins}}
|
|
int c[sizeof(b)];
|
|
f(x, c);
|
|
f(y, c);
|
|
int i = x;
|
|
// This use will always be an error regardless of instantatiation
|
|
// so diagnose this early.
|
|
const int &r = x; //expected-error{{variable}}
|
|
};
|
|
};
|
|
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int run = foo();
|
|
}
|
|
|
|
namespace generic_nongenerics_interleaved_1 {
|
|
int foo() {
|
|
{
|
|
auto L = [](int a) {
|
|
int y = 10;
|
|
return [=](auto b) {
|
|
return a + y;
|
|
};
|
|
};
|
|
auto M = L(3);
|
|
M(5);
|
|
}
|
|
{
|
|
int x;
|
|
auto L = [](int a) {
|
|
int y = 10;
|
|
return [=](auto b) {
|
|
return a + y;
|
|
};
|
|
};
|
|
auto M = L(3);
|
|
M(5);
|
|
}
|
|
{
|
|
// FIXME: why are there 2 error messages here?
|
|
int x;
|
|
auto L = [](auto a) { //expected-note {{declared here}}
|
|
int y = 10; //expected-note {{declared here}}
|
|
return [](int b) { //expected-note 2{{expression begins here}}
|
|
return [=] (auto c) {
|
|
return a + y; //expected-error 2{{cannot be implicitly captured}}
|
|
};
|
|
};
|
|
};
|
|
}
|
|
{
|
|
int x;
|
|
auto L = [](auto a) {
|
|
int y = 10;
|
|
return [=](int b) {
|
|
return [=] (auto c) {
|
|
return a + y;
|
|
};
|
|
};
|
|
};
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
int run = foo();
|
|
}
|
|
namespace dont_capture_refs_if_initialized_with_constant_expressions {
|
|
|
|
auto foo(int i) {
|
|
// This is surprisingly not odr-used within the lambda!
|
|
static int j;
|
|
j = i;
|
|
int &ref_j = j;
|
|
return [](auto a) { return ref_j; }; // ok
|
|
}
|
|
|
|
template<class T>
|
|
auto foo2(T t) {
|
|
// This is surprisingly not odr-used within the lambda!
|
|
static T j;
|
|
j = t;
|
|
T &ref_j = j;
|
|
return [](auto a) { return ref_j; }; // ok
|
|
}
|
|
|
|
int do_test() {
|
|
auto L = foo(3);
|
|
auto L_int = L(3);
|
|
auto L_char = L('a');
|
|
auto L1 = foo2(3.14);
|
|
auto L1_int = L1(3);
|
|
auto L1_char = L1('a');
|
|
return 0;
|
|
}
|
|
|
|
} // dont_capture_refs_if_initialized_with_constant_expressions
|
|
|
|
namespace test_conversion_to_fptr {
|
|
|
|
template<class T> struct X {
|
|
|
|
T (*fp)(T) = [](auto a) { return a; };
|
|
|
|
};
|
|
|
|
X<int> xi;
|
|
|
|
template<class T>
|
|
void fooT(T t, T (*fp)(T) = [](auto a) { return a; }) {
|
|
fp(t);
|
|
}
|
|
|
|
int test() {
|
|
{
|
|
auto L = [](auto a) { return a; };
|
|
int (*fp)(int) = L;
|
|
fp(5);
|
|
L(3);
|
|
char (*fc)(char) = L;
|
|
fc('b');
|
|
L('c');
|
|
double (*fd)(double) = L;
|
|
fd(3.14);
|
|
fd(6.26);
|
|
L(4.25);
|
|
}
|
|
{
|
|
auto L = [](auto a) ->int { return a; }; //expected-note 2{{candidate template ignored}}
|
|
int (*fp)(int) = L;
|
|
char (*fc)(char) = L; //expected-error{{no viable conversion}}
|
|
double (*fd)(double) = L; //expected-error{{no viable conversion}}
|
|
}
|
|
{
|
|
int x = 5;
|
|
auto L = [=](auto b, char c = 'x') {
|
|
int i = x;
|
|
return [](auto a) ->decltype(a) { return a; };
|
|
};
|
|
int (*fp)(int) = L(8);
|
|
fp(5);
|
|
L(3);
|
|
char (*fc)(char) = L('a');
|
|
fc('b');
|
|
L('c');
|
|
double (*fd)(double) = L(3.14);
|
|
fd(3.14);
|
|
fd(6.26);
|
|
|
|
}
|
|
{
|
|
auto L = [=](auto b) {
|
|
return [](auto a) ->decltype(b)* { return (decltype(b)*)0; };
|
|
};
|
|
int* (*fp)(int) = L(8);
|
|
fp(5);
|
|
L(3);
|
|
char* (*fc)(char) = L('a');
|
|
fc('b');
|
|
L('c');
|
|
double* (*fd)(double) = L(3.14);
|
|
fd(3.14);
|
|
fd(6.26);
|
|
}
|
|
{
|
|
auto L = [=](auto b) {
|
|
return [](auto a) ->decltype(b)* { return (decltype(b)*)0; }; //expected-note{{candidate template ignored}}
|
|
};
|
|
char* (*fp)(int) = L('8');
|
|
fp(5);
|
|
char* (*fc)(char) = L('a');
|
|
fc('b');
|
|
double* (*fi)(int) = L(3.14);
|
|
fi(5);
|
|
int* (*fi2)(int) = L(3.14); //expected-error{{no viable conversion}}
|
|
}
|
|
|
|
{
|
|
auto L = [=](auto b) {
|
|
return [](auto a) {
|
|
return [=](auto c) {
|
|
return [](auto d) ->decltype(a + b + c + d) { return d; };
|
|
};
|
|
};
|
|
};
|
|
int (*fp)(int) = L('8')(3)(short{});
|
|
double (*fs)(char) = L(3.14)(short{})('4');
|
|
}
|
|
|
|
fooT(3);
|
|
fooT('a');
|
|
fooT(3.14);
|
|
fooT("abcdefg");
|
|
return 0;
|
|
}
|
|
int run2 = test();
|
|
|
|
}
|
|
|
|
|
|
namespace this_capture {
|
|
void f(char, int) { }
|
|
template<class T>
|
|
void f(T, const int&) { }
|
|
|
|
struct X {
|
|
int x = 0;
|
|
void foo() {
|
|
auto L = [=](auto a) {
|
|
return [=](auto b) {
|
|
//f(a, x++);
|
|
x++;
|
|
};
|
|
};
|
|
L('a')(5);
|
|
L('b')(4);
|
|
L(3.14)('3');
|
|
|
|
}
|
|
|
|
};
|
|
|
|
int run = (X{}.foo(), 0);
|
|
|
|
namespace this_capture_unresolvable {
|
|
struct X {
|
|
void f(int) { }
|
|
static void f(double) { }
|
|
|
|
int g() {
|
|
auto lam = [=](auto a) { f(a); }; // captures 'this'
|
|
lam(0); // ok.
|
|
lam(0.0); // ok.
|
|
return 0;
|
|
}
|
|
int g2() {
|
|
auto lam = [](auto a) { f(a); }; // expected-error{{'this'}}
|
|
lam(0); // expected-note{{in instantiation of}}
|
|
lam(0.0); // ok.
|
|
return 0;
|
|
}
|
|
double (*fd)(double) = [](auto a) { f(a); return a; };
|
|
|
|
};
|
|
|
|
int run = X{}.g();
|
|
|
|
}
|
|
|
|
namespace check_nsdmi_and_this_capture_of_member_functions {
|
|
|
|
struct FunctorDouble {
|
|
template<class T> FunctorDouble(T t) { t(2.14); };
|
|
};
|
|
struct FunctorInt {
|
|
template<class T> FunctorInt(T t) { t(2); }; //expected-note{{in instantiation of}}
|
|
};
|
|
|
|
template<class T> struct YUnresolvable {
|
|
void f(int) { }
|
|
static void f(double) { }
|
|
|
|
T t = [](auto a) { f(a); return a; };
|
|
T t2 = [=](auto b) { f(b); return b; };
|
|
};
|
|
|
|
template<class T> struct YUnresolvable2 {
|
|
void f(int) { }
|
|
static void f(double) { }
|
|
|
|
T t = [](auto a) { f(a); return a; }; //expected-error{{'this'}} \
|
|
//expected-note{{in instantiation of}}
|
|
T t2 = [=](auto b) { f(b); return b; };
|
|
};
|
|
|
|
|
|
YUnresolvable<FunctorDouble> yud;
|
|
// This will cause an error since it call's with an int and calls a member function.
|
|
YUnresolvable2<FunctorInt> yui;
|
|
|
|
|
|
template<class T> struct YOnlyStatic {
|
|
static void f(double) { }
|
|
|
|
T t = [](auto a) { f(a); return a; };
|
|
};
|
|
YOnlyStatic<FunctorDouble> yos;
|
|
template<class T> struct YOnlyNonStatic {
|
|
void f(int) { }
|
|
|
|
T t = [](auto a) { f(a); return a; }; //expected-error{{'this'}}
|
|
};
|
|
|
|
|
|
}
|
|
|
|
|
|
namespace check_nsdmi_and_this_capture_of_data_members {
|
|
|
|
struct FunctorDouble {
|
|
template<class T> FunctorDouble(T t) { t(2.14); };
|
|
};
|
|
struct FunctorInt {
|
|
template<class T> FunctorInt(T t) { t(2); };
|
|
};
|
|
|
|
template<class T> struct YThisCapture {
|
|
const int x = 10;
|
|
static double d;
|
|
T t = [](auto a) { return x; }; //expected-error{{'this'}}
|
|
T t2 = [](auto b) { return d; };
|
|
T t3 = [this](auto a) {
|
|
return [=](auto b) {
|
|
return x;
|
|
};
|
|
};
|
|
T t4 = [=](auto a) {
|
|
return [=](auto b) {
|
|
return x;
|
|
};
|
|
};
|
|
T t5 = [](auto a) {
|
|
return [=](auto b) {
|
|
return x; //expected-error{{'this'}}
|
|
};
|
|
};
|
|
};
|
|
|
|
template<class T> double YThisCapture<T>::d = 3.14;
|
|
|
|
|
|
}
|
|
|
|
|
|
#ifdef DELAYED_TEMPLATE_PARSING
|
|
template<class T> void foo_no_error(T t) {
|
|
auto L = []()
|
|
{ return t; };
|
|
}
|
|
template<class T> void foo(T t) { //expected-note 2{{declared here}}
|
|
auto L = []() //expected-note 2{{begins here}}
|
|
{ return t; }; //expected-error 2{{cannot be implicitly captured}}
|
|
}
|
|
template void foo(int); //expected-note{{in instantiation of}}
|
|
|
|
#else
|
|
|
|
template<class T> void foo(T t) { //expected-note{{declared here}}
|
|
auto L = []() //expected-note{{begins here}}
|
|
{ return t; }; //expected-error{{cannot be implicitly captured}}
|
|
}
|
|
|
|
#endif
|
|
}
|
|
|
|
namespace no_this_capture_for_static {
|
|
|
|
struct X {
|
|
static void f(double) { }
|
|
|
|
int g() {
|
|
auto lam = [=](auto a) { f(a); };
|
|
lam(0); // ok.
|
|
ASSERT_NO_CAPTURES(lam);
|
|
return 0;
|
|
}
|
|
};
|
|
|
|
int run = X{}.g();
|
|
}
|
|
|
|
namespace this_capture_for_non_static {
|
|
|
|
struct X {
|
|
void f(double) { }
|
|
|
|
int g() {
|
|
auto L = [=](auto a) { f(a); };
|
|
L(0);
|
|
auto L2 = [](auto a) { f(a); }; //expected-error {{cannot be implicitly captured}}
|
|
return 0;
|
|
}
|
|
};
|
|
|
|
int run = X{}.g();
|
|
}
|
|
|
|
namespace this_captures_with_num_args_disambiguation {
|
|
|
|
struct X {
|
|
void f(int) { }
|
|
static void f(double, int i) { }
|
|
int g() {
|
|
auto lam = [](auto a) { f(a, a); };
|
|
lam(0);
|
|
return 0;
|
|
}
|
|
};
|
|
|
|
int run = X{}.g();
|
|
}
|
|
namespace enclosing_function_is_template_this_capture {
|
|
// Only error if the instantiation tries to use the member function.
|
|
struct X {
|
|
void f(int) { }
|
|
static void f(double) { }
|
|
template<class T>
|
|
int g(T t) {
|
|
auto L = [](auto a) { f(a); }; //expected-error{{'this'}}
|
|
L(t); // expected-note{{in instantiation of}}
|
|
return 0;
|
|
}
|
|
};
|
|
|
|
int run = X{}.g(0.0); // OK.
|
|
int run2 = X{}.g(0); // expected-note{{in instantiation of}}
|
|
|
|
|
|
}
|
|
|
|
namespace enclosing_function_is_template_this_capture_2 {
|
|
// This should error, even if not instantiated, since
|
|
// this would need to be captured.
|
|
struct X {
|
|
void f(int) { }
|
|
template<class T>
|
|
int g(T t) {
|
|
auto L = [](auto a) { f(a); }; //expected-error{{'this'}}
|
|
L(t);
|
|
return 0;
|
|
}
|
|
};
|
|
|
|
}
|
|
|
|
|
|
namespace enclosing_function_is_template_this_capture_3 {
|
|
// This should not error, this does not need to be captured.
|
|
struct X {
|
|
static void f(int) { }
|
|
template<class T>
|
|
int g(T t) {
|
|
auto L = [](auto a) { f(a); };
|
|
L(t);
|
|
return 0;
|
|
}
|
|
};
|
|
|
|
int run = X{}.g(0.0); // OK.
|
|
int run2 = X{}.g(0); // OK.
|
|
|
|
}
|
|
|
|
namespace nested_this_capture_1 {
|
|
struct X {
|
|
void f(int) { }
|
|
static void f(double) { }
|
|
|
|
int g() {
|
|
auto L = [=](auto a) {
|
|
return [this]() {
|
|
return [=](auto b) {
|
|
f(b);
|
|
};
|
|
};
|
|
};
|
|
auto M = L(0);
|
|
auto N = M();
|
|
N(5);
|
|
return 0;
|
|
}
|
|
};
|
|
|
|
int run = X{}.g();
|
|
|
|
}
|
|
|
|
|
|
namespace nested_this_capture_2 {
|
|
struct X {
|
|
void f(int) { }
|
|
static void f(double) { }
|
|
|
|
int g() {
|
|
auto L = [=](auto a) {
|
|
return [&]() {
|
|
return [=](auto b) {
|
|
f(b);
|
|
};
|
|
};
|
|
};
|
|
auto M = L(0);
|
|
auto N = M();
|
|
N(5);
|
|
N(3.14);
|
|
return 0;
|
|
}
|
|
};
|
|
|
|
int run = X{}.g();
|
|
|
|
}
|
|
|
|
namespace nested_this_capture_3_1 {
|
|
struct X {
|
|
template<class T>
|
|
void f(int, T t) { }
|
|
template<class T>
|
|
static void f(double, T t) { }
|
|
|
|
int g() {
|
|
auto L = [=](auto a) {
|
|
return [&](auto c) {
|
|
return [=](auto b) {
|
|
f(b, c);
|
|
};
|
|
};
|
|
};
|
|
auto M = L(0);
|
|
auto N = M('a');
|
|
N(5);
|
|
N(3.14);
|
|
return 0;
|
|
}
|
|
};
|
|
|
|
int run = X{}.g();
|
|
|
|
}
|
|
|
|
|
|
namespace nested_this_capture_3_2 {
|
|
struct X {
|
|
void f(int) { }
|
|
static void f(double) { }
|
|
|
|
int g() {
|
|
auto L = [=](auto a) {
|
|
return [](int i) {
|
|
return [=](auto b) {
|
|
f(b); //expected-error {{'this' cannot}}
|
|
int x = i;
|
|
};
|
|
};
|
|
};
|
|
auto M = L(0.0);
|
|
auto N = M(3);
|
|
N(5); //expected-note {{in instantiation of}}
|
|
N(3.14); // OK.
|
|
return 0;
|
|
}
|
|
};
|
|
|
|
int run = X{}.g();
|
|
|
|
}
|
|
|
|
namespace nested_this_capture_4 {
|
|
struct X {
|
|
void f(int) { }
|
|
static void f(double) { }
|
|
|
|
int g() {
|
|
auto L = [](auto a) {
|
|
return [=](auto i) {
|
|
return [=](auto b) {
|
|
f(b); //expected-error {{'this' cannot}}
|
|
int x = i;
|
|
};
|
|
};
|
|
};
|
|
auto M = L(0.0);
|
|
auto N = M(3);
|
|
N(5); //expected-note {{in instantiation of}}
|
|
N(3.14); // OK.
|
|
return 0;
|
|
}
|
|
};
|
|
|
|
int run = X{}.g();
|
|
|
|
}
|
|
namespace capture_enclosing_function_parameters {
|
|
|
|
|
|
inline auto foo(int x) {
|
|
int i = 10;
|
|
auto lambda = [=](auto z) { return x + z; };
|
|
return lambda;
|
|
}
|
|
|
|
int foo2() {
|
|
auto L = foo(3);
|
|
L(4);
|
|
L('a');
|
|
L(3.14);
|
|
return 0;
|
|
}
|
|
|
|
inline auto foo3(int x) {
|
|
int local = 1;
|
|
auto L = [=](auto a) {
|
|
int i = a[local];
|
|
return [=](auto b) mutable {
|
|
auto n = b;
|
|
return [&, n](auto c) mutable {
|
|
++local;
|
|
return ++x;
|
|
};
|
|
};
|
|
};
|
|
auto M = L("foo-abc");
|
|
auto N = M("foo-def");
|
|
auto O = N("foo-ghi");
|
|
|
|
return L;
|
|
}
|
|
|
|
int main() {
|
|
auto L3 = foo3(3);
|
|
auto M3 = L3("L3-1");
|
|
auto N3 = M3("M3-1");
|
|
auto O3 = N3("N3-1");
|
|
N3("N3-2");
|
|
M3("M3-2");
|
|
M3("M3-3");
|
|
L3("L3-2");
|
|
}
|
|
} // end ns
|
|
|
|
namespace capture_arrays {
|
|
|
|
inline int sum_array(int n) {
|
|
int array2[5] = { 1, 2, 3, 4, 5};
|
|
|
|
auto L = [=](auto N) -> int {
|
|
int sum = 0;
|
|
int array[5] = { 1, 2, 3, 4, 5 };
|
|
sum += array2[sum];
|
|
sum += array2[N];
|
|
return 0;
|
|
};
|
|
L(2);
|
|
return L(n);
|
|
}
|
|
}
|
|
|
|
namespace capture_non_odr_used_variable_because_named_in_instantiation_dependent_expressions {
|
|
|
|
// even though 'x' is not odr-used, it should be captured.
|
|
|
|
int test() {
|
|
const int x = 10;
|
|
auto L = [=](auto a) {
|
|
(void) +x + a;
|
|
};
|
|
ASSERT_CLOSURE_SIZE_EXACT(L, sizeof(x));
|
|
}
|
|
|
|
} //end ns
|
|
#ifdef MS_EXTENSIONS
|
|
namespace explicit_spec {
|
|
template<class R> struct X {
|
|
template<class T> int foo(T t) {
|
|
auto L = [](auto a) { return a; };
|
|
L(&t);
|
|
return 0;
|
|
}
|
|
|
|
template<> int foo<char>(char c) { //expected-warning{{explicit specialization}}
|
|
const int x = 10;
|
|
auto LC = [](auto a) { return a; };
|
|
R r;
|
|
LC(&r);
|
|
auto L = [=](auto a) {
|
|
return [=](auto b) {
|
|
int d[sizeof(a)];
|
|
f(x, d);
|
|
};
|
|
};
|
|
auto M = L(1);
|
|
|
|
ASSERT_NO_CAPTURES(M);
|
|
return 0;
|
|
}
|
|
|
|
};
|
|
|
|
int run_char = X<int>{}.foo('a');
|
|
int run_int = X<double>{}.foo(4);
|
|
}
|
|
#endif // MS_EXTENSIONS
|
|
|
|
namespace nsdmi_capturing_this {
|
|
struct X {
|
|
int m = 10;
|
|
int n = [this](auto) { return m; }(20);
|
|
};
|
|
|
|
template<class T>
|
|
struct XT {
|
|
T m = 10;
|
|
T n = [this](auto) { return m; }(20);
|
|
};
|
|
|
|
XT<int> xt{};
|
|
|
|
|
|
}
|