796ed03b84
Summary: this revision adds Lexing, Parsing and Basic Semantic for the consteval specifier as specified by http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p1073r3.html with this patch, the consteval specifier is treated as constexpr but can only be applied to function declaration. Changes: - add the consteval keyword. - add parsing of consteval specifier for normal declarations and lambdas expressions. - add the whether a declaration is constexpr is now represented by and enum everywhere except for variable because they can't be consteval. - adapt diagnostic about constexpr to print constexpr or consteval depending on the case. - add tests for basic semantic. Reviewers: rsmith, martong, shafik Reviewed By: rsmith Subscribers: eraman, efriedma, rnkovacs, cfe-commits Tags: #clang Differential Revision: https://reviews.llvm.org/D61790 llvm-svn: 363362
59 lines
1.4 KiB
C++
59 lines
1.4 KiB
C++
// RUN: %clang_cc1 -std=c++2a -fsyntax-only %s -verify
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namespace basic_sema {
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consteval int f1(int i) {
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return i;
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}
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consteval constexpr int f2(int i) {
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//expected-error@-1 {{cannot combine}}
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return i;
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}
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constexpr auto l_eval = [](int i) consteval {
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return i;
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};
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constexpr consteval int f3(int i) {
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//expected-error@-1 {{cannot combine}}
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return i;
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}
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struct A {
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consteval int f1(int i) const {
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return i;
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}
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consteval A(int i);
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consteval A() = default;
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consteval ~A() = default; // expected-error {{destructor cannot be marked consteval}}
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};
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consteval struct B {}; // expected-error {{struct cannot be marked consteval}}
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consteval typedef B b; // expected-error {{typedef cannot be consteval}}
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consteval int redecl() {return 0;} // expected-note {{previous declaration is here}}
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constexpr int redecl() {return 0;} // expected-error {{constexpr declaration of 'redecl' follows consteval declaration}}
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consteval int i = 0; // expected-error {{consteval can only be used in function declarations}}
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consteval int; // expected-error {{consteval can only be used in function declarations}}
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consteval int f1() {} // expected-error {{no return statement in consteval function}}
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struct C {
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C() {}
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};
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struct D {
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C c;
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consteval D() = default; // expected-error {{cannot be consteval}}
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};
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}
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consteval int main() { // expected-error {{'main' is not allowed to be declared consteval}}
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return 0;
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}
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