public override Expression Compile()
{
var left = LeftNode.Accept(Compiler);
var right = RightNode.Accept(Compiler);
if (left.NodeType == ExpressionType.Constant)
{
var value = (iObject)((ConstantExpression)left).Value;
return(SelectBody(Object.ToBool(value), left, right));
}
if (left.NodeType == ExpressionType.Parameter)
{
return(MakeCondition(CompilerUtils.ToBool(left), left, right));
}
var leftVar = Variable(typeof(iObject));
return(Block(
typeof(iObject),
new[] { leftVar },
Assign(leftVar, left),
MakeCondition(CompilerUtils.ToBool(leftVar), leftVar, right)
));
}
private Expression ToBool(Expression condition)
{
condition = CompilerUtils.ToBool(condition);
if (Node.Token.Type == kUNTIL || Node.Token.Type == kUNTIL_MOD)
{
condition = CompilerUtils.Negate(condition);
}
return(condition);
}
private SwitchCase CompileWhen(SyntaxNode node)
{
var condition = node[0].Accept(Compiler);
condition = CompilerUtils.ToBool(condition);
var body = node[1].Accept(Compiler);
return(SwitchCase(body, condition));
}
private Expression MakeCondition(Expression condition, Expression trueBody, Expression elseBody)
{
condition = CompilerUtils.ToBool(condition);
if (Node.Token.Type == kUNLESS || Node.Token.Type == kUNLESS_MOD)
{
condition = CompilerUtils.Negate(condition);
}
return(Condition(condition, trueBody, elseBody, typeof(iObject)));
}
private SwitchCase CompileWhen(SyntaxNode node, Expression caseValue, CallSite callSite)
{
var instance = node[0].Accept(Compiler);
var arguments = NewArrayInit(typeof(iObject), caseValue);
Expression condition = CallSite.Expressions.Call(Constant(callSite), instance, arguments);
condition = CompilerUtils.ToBool(condition);
var body = node[1].Accept(Compiler);
return(SwitchCase(body, condition));
}
public Expression Compile(AssignCompiler component)
{
var getter = Variable(typeof(iObject), "getter");
var setter = component.Setter(component.Right);
var condition = CompilerUtils.ToBool(getter);
return(Block(
typeof(iObject),
new[] { getter },
Assign(getter, component.Getter),
MakeCondition(condition, getter, setter)
));
}
public override Expression Compile()
{
var condition = Operand.Accept(Compiler);
if (condition.NodeType == ExpressionType.Constant)
{
var conditionValue = (iObject)((ConstantExpression)condition).Value;
return(Object.ToBool(conditionValue)
? FalseClass.Expressions.Instance
: TrueClass.Expressions.Instance);
}
condition = CompilerUtils.ToBool(condition);
return(Condition(
condition,
FalseClass.Expressions.Instance,
TrueClass.Expressions.Instance,
typeof(iObject)
));
}
