public override int Compile(FunctionContext context)
{
context.Line(FileName, Line);
var start = context.MakeLabel("forStart");
var increment = context.MakeLabel("forContinue");
var end = context.MakeLabel("forEnd");
if (Initializer != null)
CompileCheck(context, Initializer, 0);
context.Bind(start);
if (Condition != null)
CompileCheck(context, Condition, 1);
context.JumpFalse(end);
context.PushLoop(increment, end);
CompileCheck(context, Block, 0);
context.PopLoop();
context.Bind(increment);
if (Increment != null)
CompileCheck(context, Increment, 0);
context.Jump(start);
context.Bind(end);
return 0;
}
public override int Compile(FunctionContext context)
{
context.Line(FileName, Line);
var stack = 0;
var start = context.MakeLabel("whileStart");
var end = context.MakeLabel("whileEnd");
var boolExpression = Condition as BoolExpression;
var isInfinite = boolExpression != null && boolExpression.Value;
stack += context.Bind(start);
if (!isInfinite)
{
stack += Condition.Compile(context);
stack += context.JumpFalse(end);
}
context.PushLoop(start, end);
stack += Block.Compile(context);
context.PopLoop();
stack += context.Jump(start);
stack += context.Bind(end);
CheckStack(stack, 0);
return(stack);
}
public override int Compile(FunctionContext context)
{
context.Position(Token);
var stack = 0;
var start = context.MakeLabel("doWhileStart");
var cont = context.MakeLabel("doWhileContinue");
var brk = context.MakeLabel("doWhileBreak");
var end = context.MakeLabel("doWhileEnd");
var containsFunction = new LoopContainsFunctionVisitor();
Block.Accept(containsFunction);
var loopContext = containsFunction.Value ? new LoopContext(context) : context;
// body
loopContext.PushScope();
loopContext.PushLoop(cont, containsFunction.Value ? brk : end);
stack += loopContext.Bind(start);
if (containsFunction.Value)
{
stack += loopContext.Enter();
}
stack += Block.Compile(loopContext);
loopContext.PopLoop();
// condition check
stack += context.Bind(cont); // continue
if (containsFunction.Value)
{
stack += context.Leave();
}
context.Statement(Condition);
stack += Condition.Compile(context);
stack += context.JumpTrue(start);
if (containsFunction.Value)
{
stack += context.Jump(end);
stack += context.Bind(brk); // break (with function)
stack += context.Leave();
}
stack += context.Bind(end); // break (without function)
loopContext.PopScope();
CheckStack(stack, 0);
return(stack);
}
public override int Compile(FunctionContext context)
{
context.Line(FileName, Line);
var enumerator = context.DefineInternal("enumerator", true);
var stack = 0;
var start = context.MakeLabel("foreachStart");
var end = context.MakeLabel("foreachEnd");
// set enumerator
stack += Expression.Compile(context);
stack += context.LoadField(context.String("getEnumerator"));
stack += context.Call(0);
stack += context.Store(enumerator);
// loop while moveNext returns true
stack += context.Bind(start);
stack += context.Load(enumerator);
stack += context.LoadField(context.String("moveNext"));
stack += context.Call(0);
stack += context.JumpFalse(end);
// loop body
context.PushScope();
context.PushLoop(start, end);
if (!context.DefineIdentifier(Identifier))
{
throw new MondCompilerException(FileName, Line, CompilerError.IdentifierAlreadyDefined, Identifier);
}
var identifier = context.Identifier(Identifier);
stack += context.Load(enumerator);
stack += context.LoadField(context.String("current"));
stack += context.Store(identifier);
stack += Block.Compile(context);
stack += context.Jump(start);
context.PopLoop();
context.PopScope();
// after loop
stack += context.Bind(end);
stack += context.Load(enumerator);
stack += context.LoadField(context.String("dispose"));
stack += context.Call(0);
stack += context.Drop();
CheckStack(stack, 0);
return(stack);
}
public override int Compile(FunctionContext context)
{
context.Position(Token);
var stack = 0;
var branchLabels = new List <LabelOperand>(Branches.Count);
for (var i = 0; i < Branches.Count; i++)
{
branchLabels.Add(context.MakeLabel("ifBranch_" + i));
}
var branchElse = context.MakeLabel("ifElse");
var branchEnd = context.MakeLabel("ifEnd");
context.PushScope();
for (var i = 0; i < Branches.Count; i++)
{
var branch = Branches[i];
context.Statement(branch.Condition);
stack += branch.Condition.Compile(context);
stack += context.JumpTrue(branchLabels[i]);
}
stack += context.Jump(branchElse);
for (var i = 0; i < Branches.Count; i++)
{
var branch = Branches[i];
stack += context.Bind(branchLabels[i]);
stack += branch.Block.Compile(context);
stack += context.Jump(branchEnd);
}
stack += context.Bind(branchElse);
if (Else != null)
{
stack += Else.Block.Compile(context);
}
stack += context.Bind(branchEnd);
context.PopScope();
CheckStack(stack, 0);
return(0);
}
public override int Compile(FunctionContext context)
{
context.Line(FileName, Line);
var sequenceContext = context as SequenceBodyContext;
if (sequenceContext == null)
{
throw new MondCompilerException(FileName, Line, CompilerError.YieldInFun);
}
var state = sequenceContext.SequenceBody.State;
var enumerable = sequenceContext.SequenceBody.Enumerable;
var stack = 0;
var nextState = sequenceContext.SequenceBody.NextState;
var nextStateLabel = sequenceContext.SequenceBody.MakeStateLabel(context);
stack += context.Load(context.Number(nextState));
stack += context.Store(state);
stack += Value.Compile(context);
stack += context.Load(enumerable);
stack += context.StoreField(context.String("current"));
stack += context.LoadTrue();
stack += context.Return();
stack += context.Bind(nextStateLabel);
CheckStack(stack, 0);
return(stack);
}
public override int Compile(FunctionContext context)
{
context.Line(FileName, Line);
var falseLabel = context.MakeLabel("ternaryFalse");
var endLabel = context.MakeLabel("ternaryEnd");
CompileCheck(context, Condition, 1);
context.JumpFalse(falseLabel);
CompileCheck(context, IfTrue, 1);
context.Jump(endLabel);
context.Bind(falseLabel);
CompileCheck(context, IfFalse, 1);
context.Bind(endLabel);
return 1;
}
public override int Compile(FunctionContext context)
{
context.Line(FileName, Line);
var start = context.MakeLabel("doWhileStart");
var end = context.MakeLabel("doWhileEnd");
context.Bind(start);
context.PushLoop(start, end);
CompileCheck(context, Block, 0);
context.PopLoop();
CompileCheck(context, Condition, 1);
context.JumpTrue(start);
context.Bind(end);
return 0;
}
public override int Compile(FunctionContext context)
{
context.Line(FileName, Line);
var stack = 0;
var start = context.MakeLabel("forStart");
var increment = context.MakeLabel("forContinue");
var end = context.MakeLabel("forEnd");
context.PushScope();
if (Initializer != null)
{
stack += Initializer.Compile(context);
}
context.Bind(start);
if (Condition != null)
{
stack += Condition.Compile(context);
stack += context.JumpFalse(end);
}
context.PushLoop(increment, end);
stack += Block.Compile(context);
context.PopLoop();
stack += context.Bind(increment);
if (Increment != null)
{
stack += Increment.Compile(context);
}
stack += context.Jump(start);
stack += context.Bind(end);
context.PopScope();
CheckStack(stack, 0);
return(stack);
}
public override int Compile(FunctionContext context)
{
context.Line(FileName, Line);
var stack = 0;
var falseLabel = context.MakeLabel("ternaryFalse");
var endLabel = context.MakeLabel("ternaryEnd");
stack += Condition.Compile(context);
stack += context.JumpFalse(falseLabel);
CheckStack(IfTrue.Compile(context), 1);
stack += context.Jump(endLabel);
stack += context.Bind(falseLabel);
CheckStack(IfFalse.Compile(context), 1);
stack += context.Bind(endLabel);
CheckStack(stack, 0);
return(1);
}
public override int Compile(FunctionContext context)
{
context.Line(FileName, Line);
var branchLabels = new List<LabelOperand>(Branches.Count);
for (var i = 0; i < Branches.Count; i++)
{
branchLabels.Add(context.MakeLabel("ifBranch_" + i));
}
var branchElse = context.MakeLabel("ifElse");
var branchEnd = context.MakeLabel("ifEnd");
for (var i = 0; i < Branches.Count; i++)
{
var branch = Branches[i];
CompileCheck(context, branch.Condition, 1);
context.JumpTrue(branchLabels[i]);
}
context.Jump(branchElse);
for (var i = 0; i < Branches.Count; i++)
{
var branch = Branches[i];
context.Bind(branchLabels[i]);
CompileCheck(context, branch.Block, 0);
context.Jump(branchEnd);
}
context.Bind(branchElse);
if (Else != null)
CompileCheck(context, Else.Block, 0);
context.Bind(branchEnd);
return 0;
}
public override int Compile(FunctionContext context)
{
context.Line(FileName, Line);
var stack = 0;
var start = context.MakeLabel("doWhileStart");
var cont = context.MakeLabel("doWhileContinue");
var end = context.MakeLabel("doWhileEnd");
stack += context.Bind(start);
context.PushLoop(cont, end);
stack += Block.Compile(context);
context.PopLoop();
stack += context.Bind(cont);
stack += Condition.Compile(context);
stack += context.JumpTrue(start);
stack += context.Bind(end);
CheckStack(stack, 0);
return(stack);
}
public override void CompileBody(FunctionContext context)
{
var stack = 0;
EndLabel = context.MakeLabel("state_end");
stack += context.Bind(context.Label);
stack += context.Enter();
// jump to state label
stack += context.Load(State);
stack += context.JumpTable(0, _stateLabels);
stack += context.Jump(EndLabel);
// first state
stack += context.Bind(MakeStateLabel(context));
// compile body
stack += Block.Compile(context);
// set enumerator.current to undefined
// do this before EndLabel so we dont overwrite return values
stack += context.LoadUndefined();
stack += context.Load(Enumerable);
stack += context.StoreField(context.String("current"));
stack += context.Bind(EndLabel);
// set state to end
stack += context.Load(context.Number(-1));
stack += context.Store(State);
stack += context.LoadFalse();
stack += context.Return();
CheckStack(stack, 0);
}
public virtual void CompileBody(FunctionContext context)
{
var stack = 0;
stack += context.Bind(context.Label);
stack += context.Enter();
if (OtherArguments != null)
{
stack += context.VarArgs(Arguments.Count);
}
stack += Block.Compile(context);
stack += context.LoadUndefined();
stack += context.Return();
CheckStack(stack, 0);
}
public override int Compile(FunctionContext context)
{
context.Position(Token);
var sequenceContext = context.Root as SequenceBodyContext;
if (sequenceContext == null)
{
throw new MondCompilerException(this, CompilerError.YieldInFun);
}
var state = sequenceContext.SequenceBody.State;
var enumerable = sequenceContext.SequenceBody.Enumerable;
var stack = 0;
var nextState = sequenceContext.SequenceBody.NextState;
var nextStateLabel = sequenceContext.SequenceBody.MakeStateLabel(context);
stack += Value.Compile(context);
stack += context.Load(enumerable);
stack += context.StoreField(context.String("current"));
stack += context.Load(context.Number(nextState)); // set resume point
stack += context.Store(state);
stack += context.StoreState(sequenceContext.LocalIndex - 1); // save locals
stack += context.LoadTrue();
stack += context.Return();
stack += context.Bind(nextStateLabel);
stack += context.LoadState(sequenceContext.LocalIndex - 1); // load locals
if (!(Parent is IBlockExpression))
{
stack += context.Load(context.Identifier("#input"));
CheckStack(stack, 1);
return(stack);
}
CheckStack(stack, 0);
return(stack);
}
public override int Compile(FunctionContext context)
{
context.Position(Token);
var stack = 0;
var caseLabels = new List <LabelOperand>(Branches.Count);
var caseEnd = context.MakeLabel("caseEnd");
LabelOperand caseDefault = null;
BlockExpression defaultBlock = null;
for (var i = 0; i < Branches.Count; i++)
{
var label = context.MakeLabel("caseBranch_" + i);
caseLabels.Add(label);
var conditions = Branches[i].Conditions;
if (conditions.Any(c => c == null))
{
caseDefault = label;
if (conditions.Count == 1)
{
defaultBlock = Branches[i].Block;
}
}
}
var emptyDefault = caseDefault == null;
if (emptyDefault)
{
caseDefault = context.MakeLabel("caseDefault");
}
context.PushScope();
context.Statement(Expression);
stack += Expression.Compile(context);
var flattenedBranches = FlattenBranches(Branches, caseLabels, caseDefault);
BuildTables(flattenedBranches, caseDefault, out var tables, out var rest);
foreach (var table in tables)
{
var start = table.Entries[0].Value;
var labels = table.Entries.Select(e => e.Label).ToList();
stack += context.Dup();
stack += context.JumpTable(start, labels);
}
foreach (var entry in rest)
{
stack += context.Dup();
stack += entry.Condition.Compile(context);
stack += context.BinaryOperation(TokenType.EqualTo);
stack += context.JumpTrue(entry.Label);
}
stack += context.Jump(caseDefault);
context.PushLoop(null, caseEnd);
for (var i = 0; i < Branches.Count; i++)
{
var branchStack = stack;
var branch = Branches[i];
branchStack += context.Bind(caseLabels[i]);
branchStack += context.Drop();
branchStack += branch.Block.Compile(context);
branchStack += context.Jump(caseEnd);
CheckStack(branchStack, 0);
}
// only bind if we need a default block
if (emptyDefault || defaultBlock != null)
{
stack += context.Bind(caseDefault);
}
// always drop the switch value
stack += context.Drop();
if (defaultBlock != null)
{
stack += defaultBlock.Compile(context);
}
context.PopLoop();
stack += context.Bind(caseEnd);
context.PopScope();
CheckStack(stack, 0);
return(stack);
}
public override int Compile(FunctionContext context)
{
context.Line(FileName, Line);
TokenType assignOperation;
var hasAssignOperation = _assignMap.TryGetValue(Operation, out assignOperation);
var isAssign = Operation == TokenType.Assign || hasAssignOperation;
if (isAssign)
{
var storable = Left as IStorableExpression;
if (storable == null)
throw new MondCompilerException(FileName, Line, "The left-hand side of an assignment must be storable");
var needResult = !(Parent is BlockExpression);
var stack = 0;
CompileCheck(context, Right, 1);
if (hasAssignOperation)
{
CompileCheck(context, Left, 1);
context.BinaryOperation(assignOperation);
}
if (needResult)
{
context.Dup();
stack++;
}
storable.CompileStore(context);
return stack;
}
if (Operation == TokenType.LogicalOr)
{
var endOr = context.MakeLabel("endOr");
CompileCheck(context, Left, 1);
context.JumpTruePeek(endOr);
CompileCheck(context, Right, 1);
context.Bind(endOr);
return 1;
}
if (Operation == TokenType.LogicalAnd)
{
var endAnd = context.MakeLabel("endAnd");
CompileCheck(context, Left, 1);
context.JumpFalsePeek(endAnd);
CompileCheck(context, Right, 1);
context.Bind(endAnd);
return 1;
}
CompileCheck(context, Right, 1);
CompileCheck(context, Left, 1);
context.BinaryOperation(Operation);
return 1;
}
public override int Compile(FunctionContext context)
{
context.Line(FileName, Line);
var stack = 0;
TokenType assignOperation;
var hasAssignOperation = _assignMap.TryGetValue(Operation, out assignOperation);
var isAssign = Operation == TokenType.Assign || hasAssignOperation;
if (isAssign)
{
var storable = Left as IStorableExpression;
if (storable == null)
{
throw new MondCompilerException(FileName, Line, CompilerError.LeftSideMustBeStorable);
}
var needResult = !(Parent is IBlockExpression);
stack += Right.Compile(context);
if (hasAssignOperation)
{
stack += Left.Compile(context);
stack += context.BinaryOperation(assignOperation);
}
if (needResult)
{
stack += context.Dup();
}
stack += storable.CompileStore(context);
CheckStack(stack, needResult ? 1 : 0);
return(stack);
}
if (Operation == TokenType.ConditionalOr)
{
var endOr = context.MakeLabel("endOr");
stack += Left.Compile(context);
stack += context.JumpTruePeek(endOr);
stack += context.Drop();
stack += Right.Compile(context);
stack += context.Bind(endOr);
CheckStack(stack, 1);
return(stack);
}
if (Operation == TokenType.ConditionalAnd)
{
var endAnd = context.MakeLabel("endAnd");
stack += Left.Compile(context);
stack += context.JumpFalsePeek(endAnd);
stack += context.Drop();
stack += Right.Compile(context);
stack += context.Bind(endAnd);
CheckStack(stack, 1);
return(stack);
}
stack += Right.Compile(context);
stack += Left.Compile(context);
stack += context.BinaryOperation(Operation);
CheckStack(stack, 1);
return(stack);
}
public override int Compile(FunctionContext context)
{
context.Position(Token);
var stack = 0;
var start = context.MakeLabel("forStart");
var increment = context.MakeLabel("forContinue");
var brk = context.MakeLabel("forBreak");
var end = context.MakeLabel("forEnd");
var containsFunction = new LoopContainsFunctionVisitor();
Block.Accept(containsFunction);
context.PushScope();
if (Initializer != null)
{
var hasCode = true;
if (Initializer.Statements.Count > 0)
{
if (Initializer.Statements[0] is VarExpression initializerVar &&
initializerVar.Declarations.All(d => d.Initializer == null))
{
hasCode = false;
}
}
if (hasCode)
{
context.Statement(Initializer);
}
stack += Initializer.Compile(context);
}
// loop body
context.Bind(start);
if (Condition != null)
{
context.Statement(Condition);
stack += Condition.Compile(context);
stack += context.JumpFalse(end);
}
var loopContext = containsFunction.Value ? new LoopContext(context) : context;
loopContext.PushLoop(increment, containsFunction.Value ? brk : end);
if (containsFunction.Value)
{
stack += loopContext.Enter();
}
stack += Block.Compile(loopContext);
stack += context.Bind(increment); // continue
if (containsFunction.Value)
{
stack += loopContext.Leave();
}
loopContext.PopLoop();
if (Increment != null)
{
context.Statement(Increment);
stack += Increment.Compile(context);
}
stack += context.Jump(start);
if (containsFunction.Value)
{
stack += context.Bind(brk); // break (with function)
stack += context.Leave();
}
stack += context.Bind(end); // break (without function)
context.PopScope();
CheckStack(stack, 0);
return(stack);
}
public override int Compile(FunctionContext context)
{
var stack = 0;
var isAssignOperation = _assignMap.TryGetValue(Operation, out var assignOperation);
if (IsAssign)
{
var storable = Left as IStorableExpression;
if (storable == null)
{
throw new MondCompilerException(this, CompilerError.LeftSideMustBeStorable);
}
var needResult = !(Parent is IBlockExpression);
if (isAssignOperation)
{
int preTotal;
var preTimes = needResult ? 3 : 2;
stack += preTotal = storable.CompilePreLoadStore(context, preTimes);
stack += storable.CompileLoad(context);
stack += Right.Compile(context);
stack += context.BinaryOperation(assignOperation);
switch (preTotal / preTimes)
{
case 0:
break;
case 1:
stack += context.Swap();
break;
case 2:
stack += context.Swap1For2();
break;
default:
throw new NotSupportedException();
}
stack += storable.CompileStore(context);
if (needResult)
{
stack += storable.CompileLoad(context);
}
}
else
{
stack += Right.Compile(context);
if (needResult)
{
stack += context.Dup();
}
stack += storable.CompilePreLoadStore(context, 1);
stack += storable.CompileStore(context);
}
CheckStack(stack, needResult ? 1 : 0);
return(stack);
}
if (Operation == TokenType.ConditionalOr)
{
var endOr = context.MakeLabel("endOr");
stack += Left.Compile(context);
stack += context.JumpTruePeek(endOr);
stack += context.Drop();
stack += Right.Compile(context);
stack += context.Bind(endOr);
CheckStack(stack, 1);
return(stack);
}
if (Operation == TokenType.ConditionalAnd)
{
var endAnd = context.MakeLabel("endAnd");
stack += Left.Compile(context);
stack += context.JumpFalsePeek(endAnd);
stack += context.Drop();
stack += Right.Compile(context);
stack += context.Bind(endAnd);
CheckStack(stack, 1);
return(stack);
}
stack += Left.Compile(context);
stack += Right.Compile(context);
context.Position(Token); // debug info
stack += context.BinaryOperation(Operation);
CheckStack(stack, 1);
return(stack);
}
public override int Compile(FunctionContext context)
{
context.Line(FileName, Line);
var stack = 0;
var caseLabels = new List <LabelOperand>(Branches.Count);
for (var i = 0; i < Branches.Count; i++)
{
caseLabels.Add(context.MakeLabel("caseBranch_" + i));
}
var caseDefault = context.MakeLabel("caseDefault");
var caseEnd = context.MakeLabel("caseEnd");
stack += Expression.Compile(context);
List <JumpTable> tables;
List <JumpEntry> rest;
var flattenedBranches = FlattenBranches(Branches, caseLabels);
BuildTables(flattenedBranches, caseDefault, out tables, out rest);
foreach (var table in tables)
{
var start = table.Entries[0].Value;
var labels = table.Entries.Select(e => e.Label).ToList();
stack += context.Dup();
stack += context.JumpTable(start, labels);
}
foreach (var entry in rest)
{
stack += context.Dup();
stack += entry.Condition.Compile(context);
stack += context.BinaryOperation(TokenType.EqualTo);
stack += context.JumpTrue(entry.Label);
}
stack += context.Jump(caseDefault);
context.PushLoop(null, caseEnd);
for (var i = 0; i < Branches.Count; i++)
{
var branchStack = stack;
var branch = Branches[i];
branchStack += context.Bind(caseLabels[i]);
branchStack += context.Drop();
branchStack += branch.Block.Compile(context);
branchStack += context.Jump(caseEnd);
CheckStack(branchStack, 0);
}
stack += context.Bind(caseDefault);
stack += context.Drop();
if (DefaultBlock != null)
{
stack += DefaultBlock.Compile(context);
}
context.PopLoop();
stack += context.Bind(caseEnd);
CheckStack(stack, 0);
return(stack);
}
public override int Compile(FunctionContext context)
{
context.Position(Token);
var stack = 0;
var start = context.MakeLabel("whileStart");
var cont = context.MakeLabel("whileContinue");
var brk = context.MakeLabel("whileBreak");
var end = context.MakeLabel("whileEnd");
var boolExpression = Condition as BoolExpression;
var isInfinite = boolExpression != null && boolExpression.Value;
var containsFunction = new LoopContainsFunctionVisitor();
Block.Accept(containsFunction);
var loopContext = containsFunction.Value ? new LoopContext(context) : context;
context.PushScope();
stack += context.Bind(start); // continue (without function)
if (!isInfinite)
{
context.Statement(Condition);
stack += Condition.Compile(context);
stack += context.JumpFalse(end);
}
loopContext.PushLoop(containsFunction.Value ? cont : start, containsFunction.Value ? brk : end);
if (containsFunction.Value)
{
stack += loopContext.Enter();
}
stack += Block.Compile(loopContext);
if (containsFunction.Value)
{
stack += loopContext.Bind(cont); // continue (with function)
stack += loopContext.Leave();
}
loopContext.PopLoop();
stack += context.Jump(start);
if (containsFunction.Value)
{
stack += context.Bind(brk); // break (with function)
stack += context.Leave();
}
stack += context.Bind(end); // break (without function)
context.PopScope();
CheckStack(stack, 0);
return(stack);
}
public override void CompileBody(FunctionContext context)
{
var state = context.DefineInternal("state");
var enumerable = context.DefineInternal("enumerable");
var stack = 0;
var bodyToken = new Token(Token, TokenType.Fun, null);
var body = new SequenceBodyExpression(bodyToken, null, Block, "moveNext", state, enumerable);
var seqContext = new SequenceContext(context.Compiler, "moveNext", body, context);
var getEnumerator = context.MakeFunction("getEnumerator");
getEnumerator.Function(getEnumerator.FullName);
getEnumerator.Bind(getEnumerator.Label);
getEnumerator.Enter();
getEnumerator.Load(enumerable);
getEnumerator.Return();
var dispose = context.MakeFunction("dispose");
dispose.Function(dispose.FullName);
dispose.Bind(dispose.Label);
dispose.Enter();
dispose.LoadUndefined();
dispose.Return();
stack += context.Bind(context.Label);
stack += context.Enter();
if (OtherArguments != null)
{
stack += context.VarArgs(Arguments.Count);
}
stack += context.Load(context.Number(0));
stack += context.Store(state);
stack += context.NewObject();
stack += context.Dup();
stack += context.LoadUndefined();
stack += context.Swap();
stack += context.StoreField(context.String("current"));
stack += context.Dup();
stack += body.Compile(seqContext);
stack += context.Swap();
stack += context.StoreField(context.String("moveNext"));
stack += context.Dup();
stack += context.Closure(getEnumerator.Label);
stack += context.Swap();
stack += context.StoreField(context.String("getEnumerator"));
stack += context.Dup();
stack += context.Closure(dispose.Label);
stack += context.Swap();
stack += context.StoreField(context.String("dispose"));
stack += context.Store(enumerable);
stack += context.Load(enumerable);
stack += context.Return();
CheckStack(stack, 0);
}
public override int Compile(FunctionContext context)
{
context.Position(Token);
var stack = 0;
var start = context.MakeLabel("foreachStart");
var cont = context.MakeLabel("foreachContinue");
var brk = context.MakeLabel("foreachBreak");
var end = context.MakeLabel("foreachEnd");
var containsFunction = new LoopContainsFunctionVisitor();
Block.Accept(containsFunction);
var enumerator = context.DefineInternal("enumerator", true);
// set enumerator
context.Statement(Expression);
stack += Expression.Compile(context);
stack += context.LoadField(context.String("getEnumerator"));
stack += context.Call(0, new List <ImmediateOperand>());
stack += context.Store(enumerator);
var loopContext = containsFunction.Value ? new LoopContext(context) : context;
// loop body
loopContext.PushScope();
loopContext.PushLoop(containsFunction.Value ? cont : start, containsFunction.Value ? brk : end);
IdentifierOperand identifier;
if (DestructureExpression != null)
{
identifier = context.DefineInternal(Identifier, true);
}
else
{
// create the loop variable outside of the loop context (but inside of its scope!)
if (!context.DefineIdentifier(Identifier))
{
throw new MondCompilerException(this, CompilerError.IdentifierAlreadyDefined, Identifier);
}
identifier = context.Identifier(Identifier);
}
stack += loopContext.Bind(start); // continue (without function)
if (containsFunction.Value)
{
stack += loopContext.Enter();
}
// loop while moveNext returns true
context.Statement(InToken, InToken);
stack += loopContext.Load(enumerator);
stack += loopContext.LoadField(context.String("moveNext"));
stack += loopContext.Call(0, new List <ImmediateOperand>());
stack += loopContext.JumpFalse(containsFunction.Value ? brk : end);
stack += loopContext.Load(enumerator);
stack += loopContext.LoadField(context.String("current"));
stack += loopContext.Store(identifier);
if (DestructureExpression != null)
{
stack += loopContext.Load(identifier);
stack += DestructureExpression.Compile(loopContext);
}
stack += Block.Compile(loopContext);
if (containsFunction.Value)
{
stack += loopContext.Bind(cont); // continue (with function)
stack += loopContext.Leave();
}
stack += loopContext.Jump(start);
if (containsFunction.Value)
{
stack += loopContext.Bind(brk); // break (with function)
stack += loopContext.Leave();
}
loopContext.PopLoop();
loopContext.PopScope();
// after loop
stack += context.Bind(end); // break (without function)
stack += context.Load(enumerator);
stack += context.LoadField(context.String("dispose"));
stack += context.Call(0, new List <ImmediateOperand>());
stack += context.Drop();
CheckStack(stack, 0);
return(stack);
}
public override int Compile(FunctionContext context)
{
context.Position(Token);
var stack = Initializer?.Compile(context) ?? 1;
var global = context.ArgIndex == 0 && context.Compiler.Options.MakeRootDeclarationsGlobal;
var hasSlice = false;
var headSize = 0;
var tailSize = 0;
foreach (var index in Indices)
{
if (index.IsSlice)
{
if (hasSlice)
{
throw new InvalidOperationException($"Multiple slices in {nameof(DestructuredArrayExpression)}");
}
hasSlice = true;
}
else if (hasSlice)
{
tailSize++;
}
else
{
headSize++;
}
}
var fixedSize = headSize + tailSize;
stack += context.Dup();
stack += context.LoadField(context.String("length"));
stack += context.Call(0, new List <ImmediateOperand>());
var inTail = false;
var fixedI = 0;
for (var i = 0; i < Indices.Count; i++)
{
var index = Indices[i];
var assign = context.MakeLabel("arrayDestructureAssign");
var destruct = context.MakeLabel("arrayDestructureIndex");
if (index.IsSlice)
{
inTail = true;
}
if (i < Indices.Count - 1)
{
stack += context.Dup2(); // -> init.length(), init
}
stack += context.Load(context.Number(index.IsSlice ? fixedSize : fixedI));
stack += context.BinaryOperation(TokenType.GreaterThan);
stack += context.JumpTrue(destruct);
stack += context.Drop(); // drops initializer
stack += index.IsSlice ? context.NewArray(0) : context.LoadUndefined();
stack += context.Jump(assign);
stack += context.Bind(destruct);
if (index.IsSlice)
{
stack += context.Load(context.Number(fixedI));
stack += context.Load(context.Number(-tailSize - 1));
stack += context.LoadUndefined();
stack += context.Slice();
}
else
{
stack += context.Load(context.Number(inTail ? fixedI - fixedSize : fixedI));
stack += context.LoadArray();
}
stack += context.Bind(assign);
if (global)
{
stack += context.LoadGlobal();
stack += context.StoreField(context.String(index.Name));
}
else
{
if (!context.DefineIdentifier(index.Name, IsReadOnly))
{
throw new MondCompilerException(this, CompilerError.IdentifierAlreadyDefined, index.Name);
}
stack += context.Store(context.Identifier(index.Name));
}
if (!index.IsSlice)
{
fixedI++;
}
}
CheckStack(stack, 0);
return(-1);
}