private CompilerContext IfStatement(CompilerContext context)
{
var ifFalse = Enumerable.Empty <Instruction>();
var expression = context.Node.GetNamedChild("if_condition").GetNamedChild("relational_expression");
context.Compile(expression);
var jumpCode = context.JumpExpression;
var block = context.Node.GetNamedChild("block");
var child = context.Push(block);
CodeStream ifTrue = child.Compiler(child);
var elseBlock = context.Node.GetNamedChild("else_block");
if (elseBlock != null)
{
block = elseBlock.GetNamedChild("block");
child = context.Push(block);
ifFalse = child.Compiler(child);
ifTrue.AsFluent()
.Jmp.I(ifFalse.Count() + 1);
}
context.Code.AsFluent()
.UnaryOp(jumpCode).I(ifTrue.Count() + 1);
context.Code += ifTrue;
context.Code += ifFalse;
return(context);
}
