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openSUSE:12.2
gcc41
pr31499.patch
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File pr31499.patch of Package gcc41
2007-04-09 Mark Mitchell <mark@codesourcery.com> PR c++/31449 * class.c (build_base_path): Ensure that the converted pointer has the same cv-qualification as the input. * g++.dg/init/const5.C: New test. Index: gcc/testsuite/g++.dg/init/const5.C =================================================================== --- gcc/testsuite/g++.dg/init/const5.C (revision 0) +++ gcc/testsuite/g++.dg/init/const5.C (revision 123691) @@ -0,0 +1,11 @@ +// PR c++/31449 + +class Foo {}; +class Bar : public Foo {}; +static const Foo *foo = 0; + +static Bar *bar = static_cast<const Bar*>(foo); // { dg-error "conversion" } + +void func(const Foo *foo) { + Bar *bar = static_cast<const Bar*>(foo); // { dg-error "conversion" } +} Index: gcc/cp/class.c =================================================================== --- gcc/cp/class.c (revision 123690) +++ gcc/cp/class.c (revision 123691) @@ -303,7 +303,18 @@ build_base_path (enum tree_code code, field, because other parts of the compiler know that such expressions are always non-NULL. */ if (!virtual_access && integer_zerop (offset)) - return build_nop (build_pointer_type (target_type), expr); + { + tree class_type; + /* TARGET_TYPE has been extracted from BINFO, and, is + therefore always cv-unqualified. Extract the + cv-qualifiers from EXPR so that the expression returned + matches the input. */ + class_type = TREE_TYPE (TREE_TYPE (expr)); + target_type + = cp_build_qualified_type (target_type, + cp_type_quals (class_type)); + return build_nop (build_pointer_type (target_type), expr); + } null_test = error_mark_node; }
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