File: variadic-ex14a.C

package info (click to toggle)
gcc-arm-none-eabi 15%3A8-2019-q3-1
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 571,828 kB
  • sloc: ansic: 2,937,651; cpp: 881,644; ada: 597,189; makefile: 65,528; asm: 56,499; xml: 46,621; exp: 24,747; sh: 19,684; python: 7,256; pascal: 4,370; awk: 3,497; perl: 2,695; yacc: 316; ml: 285; f90: 234; lex: 198; objc: 194; haskell: 119
file content (24 lines) | stat: -rw-r--r-- 683 bytes parent folder | download | duplicates (6) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
 
// CWG 150: Matching of template template-arguments excludes compatible
// templates
// { dg-options -fnew-ttp-matching }

template<class T> class A { /* ... */ };
template<class T, class U = T> class B { /* ... */ };
template<template<class> class P> class X { /* ... */ };
X<A> xa; // OK
X<B> xb; // OK since P0522R0

#if __cpp_variadic_templates
template <class ... Types> class C { /* ... */ };
template<template<class ...> class Q> class Y { /* ... */ };
X<C> xc; // OK since P0522R0
Y<A> ya; // OK
Y<B> yb; // OK
Y<C> yc; // OK
#endif

#if __cpp_template_auto
template<auto n> class D { /* ... */ };
template<template<int> class R> class Z { /* ... */ };
Z<D> zd; // OK
#endif