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re PR c++/52026 (Constexpr Variable Appears Uninitialized in Lambda)

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PR c++/52026
	* semantics.c (finish_id_expression): In a template, return
	the identifier for a constant variable.

From-SVN: r196081
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Jason Merrill 2013-02-15 11:17:25 -05:00 committed by Jason Merrill
parent 90680f3b80
commit 30fa2a51fa
3 changed files with 29 additions and 1 deletions
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6
gcc/cp/ChangeLog
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@ -1,3 +1,9 @@
2013-02-15 Jason Merrill <jason@redhat.com>
PR c++/52026
* semantics.c (finish_id_expression): In a template, return
the identifier for a constant variable.
2013-02-14 Jason Merrill <jason@redhat.com>
PR c++/54922

9
gcc/cp/semantics.c
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@ -3015,7 +3015,14 @@ finish_id_expression (tree id_expression,
FIXME update for final resolution of core issue 696. */
if (decl_constant_var_p (decl))
return integral_constant_value (decl);
{
if (processing_template_decl)
/* In a template, the constant value may not be in a usable
form, so look it up again at instantiation time. */
return id_expression;
else
return integral_constant_value (decl);
}
/* If we are in a lambda function, we can move out until we hit
1. the context,

15
gcc/testsuite/g++.dg/cpp0x/lambda/lambda-const2.C Normal file
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@ -0,0 +1,15 @@
// PR c++/52026
// { dg-options "-std=c++11 -O" }
// { dg-do run }
template<bool B>
int func() {
const int constVal1 = B ? 100 : -100;
const int constVal = constVal1;
return [] { return constVal; }();
}
int main() {
if (func<true>() != 100)
__builtin_abort ();
}