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re PR c++/51421 ([c++0x] ICE with invalid use of auto) 

/cp
2012-08-25  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/51421
	* decl2.c (mark_used): Consistently return false after errors
	about uses before deduction of auto.
	* semantics.c (finish_id_expression): Check mark_used return
	value and return error_mark_node in case of failure.

/testsuite
2012-08-25  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/51421
	* g++.dg/cpp0x/auto34.C: New.

From-SVN: r190665
This commit is contained in:
Paolo Carlini 2012-08-25 09:53:30 +00:00 committed by Paolo Carlini
parent cd057e3af0
commit f27a59cf8a
5 changed files with 45 additions and 7 deletions
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8
gcc/cp/ChangeLog
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@ -1,3 +1,11 @@
2012-08-25 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/51421
* decl2.c (mark_used): Consistently return false after errors
about uses before deduction of auto.
* semantics.c (finish_id_expression): Check mark_used return
value and return error_mark_node in case of failure.
2012-08-24 Jason Merrill <jason@redhat.com>
PR c++/51213 (again)

10
gcc/cp/decl2.c
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@ -4238,7 +4238,10 @@ mark_used (tree decl)
|| DECL_THUNK_P (decl))
{
if (!processing_template_decl && type_uses_auto (TREE_TYPE (decl)))
error ("use of %qD before deduction of %<auto%>", decl);
{
error ("use of %qD before deduction of %<auto%>", decl);
return false;
}
return true;
}
@ -4284,7 +4287,10 @@ mark_used (tree decl)
}
if (type_uses_auto (TREE_TYPE (decl)))
error ("use of %qD before deduction of %<auto%>", decl);
{
error ("use of %qD before deduction of %<auto%>", decl);
return false;
}
/* If we don't need a value, then we don't need to synthesize DECL. */
if (cp_unevaluated_operand != 0)

11
gcc/cp/semantics.c
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@ -3221,11 +3221,12 @@ finish_id_expression (tree id_expression,
/* Mark variable-like entities as used. Functions are similarly
marked either below or after overload resolution. */
if (TREE_CODE (decl) == VAR_DECL
|| TREE_CODE (decl) == PARM_DECL
|| TREE_CODE (decl) == CONST_DECL
|| TREE_CODE (decl) == RESULT_DECL)
mark_used (decl);
if ((TREE_CODE (decl) == VAR_DECL
|| TREE_CODE (decl) == PARM_DECL
|| TREE_CODE (decl) == CONST_DECL
|| TREE_CODE (decl) == RESULT_DECL)
&& !mark_used (decl))
return error_mark_node;
/* Only certain kinds of names are allowed in constant
expression. Template parameters have already

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2012-08-25 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/51421
* g++.dg/cpp0x/auto34.C: New.
2012-08-24 Jakub Jelinek <jakub@redhat.com>
PR c/54363

18
gcc/testsuite/g++.dg/cpp0x/auto34.C Normal file
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@ -0,0 +1,18 @@
// PR c++/51421
// { dg-do compile { target c++11 } }
int foo1(int);
void bar1()
{
auto i = foo1(i); // { dg-error "before deduction" }
}
struct A {};
A foo2(A);
void bar2()
{
auto a = foo2(a); // { dg-error "before deduction" }
}