File: cxx2b-deducing-this-constexpr.cpp

package info (click to toggle)
llvm-toolchain-19 1%3A19.1.7-3
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 1,998,520 kB
  • sloc: cpp: 6,951,680; ansic: 1,486,157; asm: 913,598; python: 232,024; f90: 80,126; objc: 75,281; lisp: 37,276; pascal: 16,990; sh: 10,009; ml: 5,058; perl: 4,724; awk: 3,523; makefile: 3,167; javascript: 2,504; xml: 892; fortran: 664; cs: 573
file content (75 lines) | stat: -rw-r--r-- 1,739 bytes parent folder | download | duplicates (5)
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
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
// RUN: %clang_cc1 -fsyntax-only -std=c++2b %s -verify
// RUN: %clang_cc1 -fsyntax-only -std=c++2b %s -verify -fexperimental-new-constant-interpreter
// expected-no-diagnostics

template <typename Base>
struct Wrap : Base {

};

struct S {
    constexpr int f(this const S&) {
        return 42;
    }
    constexpr int f(this const S&, auto&&... args) {
        return (args + ... + 0);
    }
    constexpr int operator[](this const S&) {
        return 42;
    }
    constexpr int operator[](this const S& self, int i) {
        return i + self.base;
    }
    constexpr int operator()(this const S&) {
        return 42;
    }
    constexpr int operator()(this const S& self, int i) {
        return self.base + i;
    }
    constexpr bool operator==(this const S& self, auto && test) {
        return self.base == test;
    };
    constexpr int operator*(this const S& self) {
        return self.base + 22;
    };
    constexpr operator Wrap<S> (this const S& self) {
        return Wrap<S>{self};
    };
    constexpr int operator <<(this Wrap<S> self, int i) {
        return self.base+i;
    }

    int base = 20;
};

consteval void test() {
    constexpr S s;
    static_assert(s.f() == 42);
    static_assert(s[] == 42);
    static_assert(s[22] == 42);
    static_assert(s.f() == 42);
    static_assert(s() == 42);
    static_assert(s(22) == 42);
    static_assert(s == 20);
    static_assert(s != 0);
    static_assert(*s == 42);
    static_assert((s << 11) == 31);
}

namespace GH68070 {

constexpr auto f = [x = 3]<typename Self>(this Self&& self) {
    return x;
};

auto g = [x = 3]<typename Self>(this Self&& self) {
    return x;
};

int test() {
  constexpr int a = f();
  static_assert(a == 3);
  return f() + g();
}

}