File: constexpr-late-instantiation.cpp

package info (click to toggle)
llvm-toolchain-18 1%3A18.1.8-20
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid
  • size: 1,909,296 kB
  • sloc: cpp: 6,667,975; ansic: 1,440,452; asm: 883,619; python: 230,549; objc: 76,880; f90: 74,238; lisp: 35,989; pascal: 16,571; sh: 10,229; perl: 7,459; ml: 5,047; awk: 3,523; makefile: 2,992; javascript: 2,149; xml: 892; fortran: 649; cs: 573
file content (16 lines) | stat: -rw-r--r-- 545 bytes parent folder | download | duplicates (11) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
 
// RUN: %clang_cc1 %s -fsyntax-only -verify
// RUN: %clang_cc1 %s -fexperimental-new-constant-interpreter -fsyntax-only -verify

template <typename T>
constexpr T foo(T a);   // expected-note {{declared here}}

int main() {
  int k = foo<int>(5);  // Ok
  constexpr int j =     // expected-error {{constexpr variable 'j' must be initialized by a constant expression}}
          foo<int>(5);  // expected-note {{undefined function 'foo<int>' cannot be used in a constant expression}}
}

template <typename T>
constexpr T foo(T a) {
  return a;
}