File: concepts-no-early-substitution.cpp

package info (click to toggle)
llvm-toolchain-17 1%3A17.0.6-22
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 1,799,624 kB
  • sloc: cpp: 6,428,607; ansic: 1,383,196; asm: 793,408; python: 223,504; objc: 75,364; f90: 60,502; lisp: 33,869; pascal: 15,282; sh: 9,684; perl: 7,453; ml: 4,937; awk: 3,523; makefile: 2,889; javascript: 2,149; xml: 888; fortran: 619; cs: 573
file content (33 lines) | stat: -rw-r--r-- 611 bytes parent folder | download | duplicates (10) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
 
// RUN: %clang_cc1 -std=c++20 -x c++ %s -verify -fsyntax-only
// expected-no-diagnostics

template <typename T0>
concept HasMemberBegin = requires(T0 t) { t.begin(); };

struct GetBegin {
  template <HasMemberBegin T1>
  void operator()(T1);
};

GetBegin begin;

template <typename T2>
concept Concept = requires(T2 t) { begin(t); };

struct Subrange;

template <typename T3>
struct View {
  Subrange &getSubrange();

  operator bool()
    requires true;

  operator bool()
    requires requires { begin(getSubrange()); };

  void begin();
};

struct Subrange : View<void> {};
static_assert(Concept<Subrange>);