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89296ee2c3
Recovery from malformed lambda introducers would find us consuming the synthetic default argument token, which is bad. Instead, stop right before that token. llvm-svn: 225613
106 lines
4.1 KiB
C++
106 lines
4.1 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -Wno-unused-value -verify -std=c++11 %s
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enum E { e };
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constexpr int id(int n) { return n; }
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class C {
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int f() {
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int foo, bar;
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[]; // expected-error {{expected body of lambda expression}}
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[+] {}; // expected-error {{expected variable name or 'this' in lambda capture list}}
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[foo+] {}; // expected-error {{expected ',' or ']' in lambda capture list}}
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[foo,&this] {}; // expected-error {{'this' cannot be captured by reference}}
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[&this] {}; // expected-error {{'this' cannot be captured by reference}}
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[&,] {}; // expected-error {{expected variable name or 'this' in lambda capture list}}
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[=,] {}; // expected-error {{expected variable name or 'this' in lambda capture list}}
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[] {};
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[=] (int i) {};
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[&] (int) mutable -> void {};
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[foo,bar] () { return 3; };
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[=,&foo] () {};
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[&,foo] () {};
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[this] () {};
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[] () -> class C { return C(); };
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[] () -> enum E { return e; };
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[] -> int { return 0; }; // expected-error{{lambda requires '()' before return type}}
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[] mutable -> int { return 0; }; // expected-error{{lambda requires '()' before 'mutable'}}
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[](int) -> {}; // PR13652 expected-error {{expected a type}}
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return 1;
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}
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void designator_or_lambda() {
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typedef int T;
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const int b = 0;
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const int c = 1;
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int d;
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int a1[1] = {[b] (T()) {}}; // expected-error{{no viable conversion from '(lambda}}
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int a2[1] = {[b] = 1 };
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int a3[1] = {[b,c] = 1 }; // expected-error{{expected ']'}} expected-note {{to match}}
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int a4[1] = {[&b] = 1 }; // expected-error{{integral constant expression must have integral or unscoped enumeration type, not 'const int *'}}
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int a5[3] = { []{return 0;}() };
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int a6[1] = {[this] = 1 }; // expected-error{{integral constant expression must have integral or unscoped enumeration type, not 'C *'}}
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int a7[1] = {[d(0)] { return d; } ()}; // expected-warning{{extension}}
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int a8[1] = {[d = 0] { return d; } ()}; // expected-warning{{extension}}
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int a9[1] = {[d = 0] = 1}; // expected-error{{is not an integral constant expression}}
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int a10[1] = {[id(0)] { return id; } ()}; // expected-warning{{extension}}
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int a11[1] = {[id(0)] = 1};
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}
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void delete_lambda(int *p) {
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delete [] p;
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delete [] (int*) { new int }; // ok, compound-literal, not lambda
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delete [] { return new int; } (); // expected-error{{expected expression}}
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delete [&] { return new int; } (); // ok, lambda
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}
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// We support init-captures in C++11 as an extension.
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int z;
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void init_capture() {
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[n(0)] () mutable -> int { return ++n; }; // expected-warning{{extension}}
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[n{0}] { return; }; // expected-error {{<initializer_list>}} expected-warning{{extension}}
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[n = 0] { return ++n; }; // expected-error {{captured by copy in a non-mutable}} expected-warning{{extension}}
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[n = {0}] { return; }; // expected-error {{<initializer_list>}} expected-warning{{extension}}
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[a([&b = z]{})](){}; // expected-warning 2{{extension}}
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int x = 4;
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auto y = [&r = x, x = x + 1]() -> int { // expected-warning 2{{extension}}
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r += 2;
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return x + 2;
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} ();
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}
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void attributes() {
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[] [[]] {}; // expected-error {{lambda requires '()' before attribute specifier}}
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[] __attribute__((noreturn)) {}; // expected-error {{lambda requires '()' before attribute specifier}}
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[]() [[]]
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mutable {}; // expected-error {{expected body of lambda expression}}
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[]() [[]] {};
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[]() [[]] -> void {};
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[]() mutable [[]] -> void {};
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[]() mutable noexcept [[]] -> void {};
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// Testing GNU-style attributes on lambdas -- the attribute is specified
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// before the mutable specifier instead of after (unlike C++11).
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[]() __attribute__((noreturn)) mutable { while(1); };
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[]() mutable
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__attribute__((noreturn)) { while(1); }; // expected-error {{expected body of lambda expression}}
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}
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};
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template <typename>
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void PR22122() {
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[](int) -> {}; // expected-error {{expected a type}}
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}
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template void PR22122<int>();
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struct S {
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template <typename T>
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void m (T x =[0); // expected-error{{expected variable name or 'this' in lambda capture list}}
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} s;
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