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Allow the last member of a struct to be an unsized/zero-length array.

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This enables the C truck of allocating a dynamic amount of storage for
the struct in order to extend out the array to the desired length.
This commit is contained in:
Matt Pharr
2012-03-25 13:10:12 -07:00
parent ca3100874f
commit 1da2834b1e
3 changed files with 35 additions and 10 deletions
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19
decl.cpp
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@@ -739,15 +739,7 @@ GetStructTypesNamesPositions(const std::vector<StructDeclaration *> &sd,
if (Type::Equal(sym->type, AtomicType::Void))
Error(d->pos, "\"void\" type illegal for struct member.");
const ArrayType *arrayType =
dynamic_cast<const ArrayType *>(sym->type);
if (arrayType != NULL && arrayType->GetElementCount() == 0) {
Error(d->pos, "Unsized arrays aren't allowed in struct "
"definitions.");
elementTypes->push_back(NULL);
}
else
elementTypes->push_back(sym->type);
elementTypes->push_back(sym->type);
if (seenNames.find(sym->name) != seenNames.end())
Error(d->pos, "Struct member \"%s\" has same name as a "
@@ -759,4 +751,13 @@ GetStructTypesNamesPositions(const std::vector<StructDeclaration *> &sd,
elementPositions->push_back(sym->pos);
}
}
for (int i = 0; i < (int)elementTypes->size() - 1; ++i) {
const ArrayType *arrayType =
dynamic_cast<const ArrayType *>((*elementTypes)[i]);
if (arrayType != NULL && arrayType->GetElementCount() == 0)
Error((*elementPositions)[i], "Unsized arrays aren't allowed except "
"for the last member in a struct definition.");
}
}