void convertFreeVars(LambdaPtr x, EnvPtr env,
const string &closureDataName,
vector<string> &freeVars)
{
EnvPtr env2 = new Env(env);
for (unsigned i = 0; i < x->formalArgs.size(); ++i) {
FormalArgPtr arg = x->formalArgs[i];
addLocal(env2, arg->name, arg->name.ptr());
}
if (x->formalVarArg.ptr()) {
addLocal(env2, x->formalVarArg->name, x->formalVarArg->name.ptr());
}
LambdaContext ctx(x->captureByRef, env, closureDataName, freeVars);
convertFreeVars(x->body, env2, ctx);
}
void initializeLambda(LambdaPtr x, EnvPtr env)
{
assert(!x->initialized);
x->initialized = true;
string lname = lambdaName(x);
ostringstream ostr;
ostr << "%closureData:" << lname;
string closureDataName = ostr.str();
convertFreeVars(x, env, closureDataName, x->freeVars);
getProcedureMonoTypes(x->mono, env, x->formalArgs, x->formalVarArg);
if (x->freeVars.empty()) {
initializeLambdaWithoutFreeVars(x, env, closureDataName, lname);
}
else {
initializeLambdaWithFreeVars(x, env, closureDataName, lname);
}
}
void initializeLambda(LambdaPtr x, EnvPtr env)
{
assert(!x->initialized);
x->initialized = true;
int lambdaObjectIndex = nextLambdaObjectIndex();
ostringstream ostr;
ostr << "%closureData" << lambdaObjectIndex;
string closureDataName = ostr.str();
convertFreeVars(x, env, closureDataName, x->freeVars);
if (x->freeVars.empty()) {
initializeLambdaWithoutFreeVars(x, env);
}
else {
initializeLambdaWithFreeVars(
x, env, closureDataName, lambdaObjectIndex);
}
}
void convertFreeVars(ExprListPtr x, EnvPtr env, LambdaContext &ctx)
{
for (unsigned i = 0; i < x->size(); ++i)
convertFreeVars(x->exprs[i], env, ctx);
}
void convertFreeVars(ExprPtr &x, EnvPtr env, LambdaContext &ctx)
{
switch (x->exprKind) {
case BOOL_LITERAL :
case INT_LITERAL :
case FLOAT_LITERAL :
case CHAR_LITERAL :
case STRING_LITERAL :
case IDENTIFIER_LITERAL :
break;
case NAME_REF : {
NameRef *y = (NameRef *)x.ptr();
bool isNonLocal = false;
bool isGlobal = false;
ObjectPtr z = lookupEnvEx(env, y->name, ctx.nonLocalEnv,
isNonLocal, isGlobal);
if (isNonLocal && !isGlobal) {
if ((z->objKind == PVALUE) || (z->objKind == CVALUE)) {
TypePtr t = typeOfValue(z);
if (isStaticOrTupleOfStatics(t)) {
ExprListPtr args = new ExprList();
args->add(new ObjectExpr(t.ptr()));
CallPtr call = new Call(operator_expr_typeToRValue(), args);
call->location = y->location;
x = call.ptr();
}
else {
addFreeVar(ctx, y->name->str);
IdentifierPtr a = new Identifier(ctx.closureDataName);
a->location = y->location;
NameRefPtr b = new NameRef(a);
b->location = y->location;
FieldRefPtr c = new FieldRef(b.ptr(), y->name);
c->location = y->location;
if (ctx.captureByRef) {
vector<int> ops;
ops.push_back(DEREFERENCE);
ExprPtr d = new VariadicOp(ops, new ExprList(c.ptr()));
d->location = y->location;
x = d.ptr();
}
else {
x = c.ptr();
}
}
}
else if ((z->objKind == MULTI_PVALUE) || (z->objKind == MULTI_CVALUE)) {
vector<TypePtr> types = typesOfValues(z);
bool allStatic = true;
for (unsigned i = 0; i < types.size(); ++i) {
if (!isStaticOrTupleOfStatics(types[i])) {
allStatic = false;
break;
}
}
if (allStatic) {
ExprListPtr args = new ExprList();
for (unsigned i = 0; i < types.size(); ++i)
args->add(new ObjectExpr(types[i].ptr()));
CallPtr call = new Call(operator_expr_typesToRValues(), args);
call->location = y->location;
x = call.ptr();
}
else {
addFreeVar(ctx, y->name->str);
IdentifierPtr a = new Identifier(ctx.closureDataName);
a->location = y->location;
NameRefPtr b = new NameRef(a);
b->location = y->location;
FieldRefPtr c = new FieldRef(b.ptr(), y->name);
c->location = y->location;
if (ctx.captureByRef) {
ExprPtr f =
operator_expr_unpackMultiValuedFreeVarAndDereference();
CallPtr d = new Call(f, new ExprList());
d->parenArgs->add(c.ptr());
x = d.ptr();
}
else {
ExprPtr f = operator_expr_unpackMultiValuedFreeVar();
CallPtr d = new Call(f, new ExprList());
d->parenArgs->add(c.ptr());
x = d.ptr();
}
}
}
}
break;
}
case TUPLE : {
Tuple *y = (Tuple *)x.ptr();
convertFreeVars(y->args, env, ctx);
break;
}
case PAREN : {
Paren *y = (Paren *)x.ptr();
convertFreeVars(y->args, env, ctx);
break;
}
case INDEXING : {
Indexing *y = (Indexing *)x.ptr();
convertFreeVars(y->expr, env, ctx);
convertFreeVars(y->args, env, ctx);
break;
}
case CALL : {
Call *y = (Call *)x.ptr();
convertFreeVars(y->expr, env, ctx);
convertFreeVars(y->parenArgs, env, ctx);
convertFreeVars(y->lambdaArgs, env, ctx);
break;
}
case FIELD_REF : {
FieldRef *y = (FieldRef *)x.ptr();
convertFreeVars(y->expr, env, ctx);
break;
}
case STATIC_INDEXING : {
StaticIndexing *y = (StaticIndexing *)x.ptr();
convertFreeVars(y->expr, env, ctx);
break;
}
case VARIADIC_OP : {
VariadicOp *y = (VariadicOp *)x.ptr();
convertFreeVars(y->exprs, env, ctx);
break;
}
case AND : {
And *y = (And *)x.ptr();
convertFreeVars(y->expr1, env, ctx);
convertFreeVars(y->expr2, env, ctx);
break;
}
case OR : {
Or *y = (Or *)x.ptr();
convertFreeVars(y->expr1, env, ctx);
convertFreeVars(y->expr2, env, ctx);
break;
}
case LAMBDA : {
Lambda *y = (Lambda *)x.ptr();
EnvPtr env2 = new Env(env);
for (unsigned i = 0; i < y->formalArgs.size(); ++i)
addLocal(env2, y->formalArgs[i]->name, y->formalArgs[i]->name.ptr());
if (y->formalVarArg.ptr())
addLocal(env2, y->formalVarArg->name, y->formalVarArg->name.ptr());
convertFreeVars(y->body, env2, ctx);
break;
}
case UNPACK : {
Unpack *y = (Unpack *)x.ptr();
convertFreeVars(y->expr, env, ctx);
break;
}
case STATIC_EXPR : {
StaticExpr *y = (StaticExpr *)x.ptr();
convertFreeVars(y->expr, env, ctx);
break;
}
case DISPATCH_EXPR : {
DispatchExpr *y = (DispatchExpr *)x.ptr();
convertFreeVars(y->expr, env, ctx);
break;
}
case EVAL_EXPR : {
EvalExpr *eval = (EvalExpr *)x.ptr();
convertFreeVars(eval->args, env, ctx);
break;
}
case FOREIGN_EXPR :
case OBJECT_EXPR :
case FILE_EXPR :
case LINE_EXPR :
case COLUMN_EXPR :
case ARG_EXPR :
break;
}
}
void convertFreeVars(StatementPtr x, EnvPtr env, LambdaContext &ctx)
{
switch (x->stmtKind) {
case BLOCK : {
Block *y = (Block *)x.ptr();
if (!y->desugared)
y->desugared = desugarBlock(y);
for (unsigned i = 0; i < y->desugared->statements.size(); ++i) {
StatementPtr z = y->desugared->statements[i];
if (z->stmtKind == BINDING) {
Binding *a = (Binding *)z.ptr();
convertFreeVars(a->values, env, ctx);
EnvPtr env2 = new Env(env);
for (unsigned j = 0; j < a->names.size(); ++j)
addLocal(env2, a->names[j], a->names[j].ptr());
env = env2;
}
else {
convertFreeVars(z, env, ctx);
}
}
break;
}
case LABEL :
case BINDING : {
break;
}
case ASSIGNMENT : {
Assignment *y = (Assignment *)x.ptr();
convertFreeVars(y->left, env, ctx);
convertFreeVars(y->right, env, ctx);
break;
}
case INIT_ASSIGNMENT : {
InitAssignment *y = (InitAssignment *)x.ptr();
convertFreeVars(y->left, env, ctx);
convertFreeVars(y->right, env, ctx);
break;
}
case UPDATE_ASSIGNMENT : {
UpdateAssignment *y = (UpdateAssignment *)x.ptr();
convertFreeVars(y->left, env, ctx);
convertFreeVars(y->right, env, ctx);
break;
}
case GOTO : {
break;
}
case RETURN : {
Return *y = (Return *)x.ptr();
convertFreeVars(y->values, env, ctx);
break;
}
case IF : {
If *y = (If *)x.ptr();
convertFreeVars(y->condition, env, ctx);
convertFreeVars(y->thenPart, env, ctx);
if (y->elsePart.ptr())
convertFreeVars(y->elsePart, env, ctx);
break;
}
case SWITCH : {
Switch *y = (Switch *)x.ptr();
convertFreeVars(y->expr, env, ctx);
for (unsigned i = 0; i < y->caseBlocks.size(); ++i) {
CaseBlockPtr z = y->caseBlocks[i];
convertFreeVars(z->caseLabels, env, ctx);
convertFreeVars(z->body, env, ctx);
}
if (y->defaultCase.ptr())
convertFreeVars(y->defaultCase, env, ctx);
break;
}
case EVAL_STATEMENT : {
EvalStatement *eval = (EvalStatement *)x.ptr();
convertFreeVars(eval->args, env, ctx);
break;
}
case EXPR_STATEMENT : {
ExprStatement *y = (ExprStatement *)x.ptr();
convertFreeVars(y->expr, env, ctx);
break;
}
case WHILE : {
While *y = (While *)x.ptr();
convertFreeVars(y->condition, env, ctx);
convertFreeVars(y->body, env, ctx);
break;
}
case BREAK :
case CONTINUE : {
break;
}
case FOR : {
For *y = (For *)x.ptr();
convertFreeVars(y->expr, env, ctx);
EnvPtr env2 = new Env(env);
for (unsigned j = 0; j < y->variables.size(); ++j)
addLocal(env2, y->variables[j], y->variables[j].ptr());
convertFreeVars(y->body, env2, ctx);
break;
}
case FOREIGN_STATEMENT : {
break;
}
case TRY : {
Try *y = (Try *)x.ptr();
convertFreeVars(y->tryBlock, env, ctx);
for (unsigned i = 0; i < y->catchBlocks.size(); ++i) {
EnvPtr env2 = new Env(env);
addLocal(env2,
y->catchBlocks[i]->exceptionVar,
y->catchBlocks[i]->exceptionVar.ptr()
);
if (y->catchBlocks[i]->exceptionType.ptr())
convertFreeVars(y->catchBlocks[i]->exceptionType, env, ctx);
convertFreeVars(y->catchBlocks[i]->body, env2, ctx);
}
break;
}
case THROW : {
Throw *y = (Throw *)x.ptr();
convertFreeVars(y->expr, env, ctx);
break;
}
case STATIC_FOR : {
StaticFor *y = (StaticFor *)x.ptr();
convertFreeVars(y->values, env, ctx);
EnvPtr env2 = new Env(env);
addLocal(env2, y->variable, y->variable.ptr());
convertFreeVars(y->body, env2, ctx);
break;
}
case FINALLY : {
Finally *y = (Finally *)x.ptr();
convertFreeVars(y->body, env, ctx);
break;
}
case ONERROR : {
OnError *y = (OnError *)x.ptr();
convertFreeVars(y->body, env, ctx);
break;
}
case UNREACHABLE :
break;
default :
assert(false);
}
}