538a530848
In this PR, instantiating the static thunk returned from the generic lambda conversion function template was using normal overload resolution, which meant calling an extra constructor when forwarding its argument. Fixed by special-casing thunk calls significantly more. * lambda.c (maybe_add_lambda_conv_op): Use a template-id in the call. Only forward parms for decltype. * pt.c (tsubst_copy_and_build) [CALL_EXPR]: Handle CALL_FROM_THUNK_P specially. * typeck.c (check_return_expr): Don't mess with a thunk call. From-SVN: r268377
34 lines
594 B
C
34 lines
594 B
C
// PR c++/86943
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// { dg-do run { target c++14 } }
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int c[3];
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struct S
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{
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S () : s (1234) { c[0]++; }
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S (const S &) { __builtin_abort (); }
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S (S &&x) noexcept { if (x.s != 1234) __builtin_abort (); s = 1234; x.s = 2345; c[1]++; }
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~S () { if (s != 1234 && s != 2345) __builtin_abort (); c[2]++; }
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int s;
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};
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using F = S (*) (S);
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F
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foo ()
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{
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return [] (auto val)->S { if (val.s != 1234) __builtin_abort (); return {}; };
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}
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int
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main ()
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{
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{
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volatile F f = foo ();
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S s = f ({});
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if (s.s != 1234) __builtin_abort ();
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}
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if (c[0] + c[1] != c[2])
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__builtin_abort ();
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}
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