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Add support for forward declarations of structures.

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Now a declaration like 'struct Foo;' can be used to establish the
name of a struct type, without providing a definition.  One can
pass pointers to such types around the system, but can't do much
else with them (as in C/C++).

Issue #125.
This commit is contained in:
Matt Pharr
2012-04-16 06:27:21 -07:00
parent fefa86e0cf
commit 99a27fe241
13 changed files with 537 additions and 173 deletions
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8
parse.yy
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@@ -874,7 +874,6 @@ struct_or_union_specifier
std::vector<SourcePos> elementPositions;
GetStructTypesNamesPositions(*$3, &elementTypes, &elementNames,
&elementPositions);
// FIXME: should be unbound
$$ = new StructType("", elementTypes, elementNames, elementPositions,
false, Variability::Unbound, @1);
}
@@ -892,10 +891,9 @@ struct_or_union_specifier
| struct_or_union struct_or_union_name
{
const Type *st = m->symbolTable->LookupType($2);
if (!st) {
std::vector<std::string> alternates = m->symbolTable->ClosestTypeMatch($2);
std::string alts = lGetAlternates(alternates);
Error(@2, "Struct type \"%s\" unknown.%s", $2, alts.c_str());
if (st == NULL) {
st = new UndefinedStructType($2, Variability::Unbound, false, @2);
m->symbolTable->AddType($2, st, @2);
}
else if (dynamic_cast<const StructType *>(st) == NULL)
Error(@2, "Type \"%s\" is not a struct type! (%s)", $2,