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[serialization] Add support for niladic function decls.

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Like everything else, there are several caveats: no generic params, no
attributes, and (for now) no arguments. Pattern support is coming next.

Swift SVN r5701
This commit is contained in:
Jordan Rose
2013-06-19 23:34:33 +00:00
parent a3cd729262
commit 93be189ca4
5 changed files with 204 additions and 1 deletions
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61
lib/Serialization/ModuleFile.cpp
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@@ -293,6 +293,67 @@ Decl *ModuleFile::getDecl(DeclID DID) {
break;
}
case decls_block::FUNC_DECL: {
IdentifierID nameID;
DeclID contextID;
bool isImplicit, isNeverLValue;
TypeID signatureID;
bool isClassMethod;
DeclID associatedDeclID;
DeclID overriddenID;
decls_block::FuncLayout::readRecord(scratch, nameID, contextID, isImplicit,
isNeverLValue, signatureID,
isClassMethod, associatedDeclID,
overriddenID);
auto DC = getDeclContext(contextID);
auto signature = cast<FunctionType>(getType(signatureID).getPointer());
auto emptyArgs = TuplePattern::create(ctx, SourceLoc(), {}, SourceLoc());
auto body = FuncExpr::create(ctx, SourceLoc(), emptyArgs, emptyArgs,
TypeLoc::withoutLoc(signature->getResult()),
/*body=*/nullptr, DC);
auto fn = new (ctx) FuncDecl(SourceLoc(), SourceLoc(),
getIdentifier(nameID), SourceLoc(),
/*generic params=*/nullptr, signature,
body, DC);
declOrOffset = fn;
fn->setOverriddenDecl(cast_or_null<FuncDecl>(getDecl(overriddenID)));
fn->setNeverUsedAsLValue(isNeverLValue);
fn->setStatic(isClassMethod);
if (isImplicit)
fn->setImplicit();
if (Decl *associated = getDecl(associatedDeclID)) {
if (auto op = dyn_cast<OperatorDecl>(associated)) {
fn->setOperatorDecl(op);
} else {
bool isGetter = false;
if (auto subscript = dyn_cast<SubscriptDecl>(associated)) {
isGetter = (subscript->getGetter() == fn);
assert(isGetter || subscript->getSetter() == fn);
} else if (auto var = dyn_cast<VarDecl>(associated)) {
isGetter = (var->getGetter() == fn);
assert(isGetter || var->getSetter() == fn);
} else {
llvm_unreachable("unknown associated decl kind");
}
if (isGetter)
fn->makeGetter(associated);
else
fn->makeSetter(associated);
}
}
break;
}
default:
// We don't know how to deserialize this kind of decl.
error();