File: test17590.d

package info (click to toggle)
gcc-arm-none-eabi 15%3A14.2.rel1-1
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 1,099,328 kB
  • sloc: cpp: 3,627,108; ansic: 2,571,498; ada: 834,230; f90: 235,082; makefile: 79,231; asm: 74,984; xml: 51,692; exp: 39,736; sh: 33,298; objc: 15,629; python: 15,069; fortran: 14,429; pascal: 7,003; awk: 5,070; perl: 3,106; ml: 285; lisp: 253; lex: 204; haskell: 135
file content (40 lines) | stat: -rw-r--r-- 901 bytes parent folder | download | duplicates (3) 
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
 
// REQUIRED_ARGS: -o- -preview=dip1000

void lazyfun(scope lazy int a) @nogc;

// Test that returning a local _static_ struct does not lead to allocation of a closure.
auto foo_static(int a, bool b) @nogc {
    static struct SInside {}

    SInside res;

    lazyfun(a);

    return res;
}

// Test that returning a local _non-static_ struct that does not reference any local variable does not lead to allocation of a closure.
auto foo_nonstatic(int a, bool b) @nogc {
    struct SInside {}

    SInside res;

    lazyfun(a);

    return res;
}

// Test that returning a local non-static struct that references a local variable does lead to allocation of a closure.
static assert(!__traits(compiles, () @nogc => goo(1)));
static assert(__traits(compiles, () => goo(1)));
auto goo(T)(T a) {
    struct SInside {
        T foo() { return a; }
    }

    SInside res;

    lazyfun(a);

    return res;
}