mirror of git://gcc.gnu.org/git/gcc.git
28 lines
1.0 KiB
C
28 lines
1.0 KiB
C
// PR c++/54020
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// { dg-do compile { target c++11 } }
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// Preliminaries.
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extern int nonconst_func(int);
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constexpr int identity(int x) { return x; }
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constexpr int zero() { return identity(0); }
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constexpr int one() { return identity(1); }
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// Correctly accepted.
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constexpr int three = one() ? 3 : nonconst_func(0);
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// Incorrectly accepted. See [dcl.constexpr] #5:
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// For a constexpr function, if no function argument values exist
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// such that the function invocation sub-stitution would produce a
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// constant expression (5.19), the program is ill-formed; no diagnostic
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// required.
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constexpr int bogus() { return zero () ? 3 : nonconst_func(0); } // { dg-error "nonconst_func" }
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// Correctly rejected (not sure why).
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constexpr int correct_error() { return nonconst_func(0); } // { dg-error "nonconst_func" }
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// Correctly rejected.
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constexpr int z = bogus(); // { dg-error "" }
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// This is also correctly rejected.
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constexpr int correct_failure() { return 0 ? 3 : nonconst_func(0); } // { dg-error "nonconst_func" }
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