public ExpressionTreeNode(DeltinScriptParser.ExprContext context, BuildAstVisitor visitor) : base(new Location(visitor.file, Range.GetRange(context)))
{
Tree = new Node[context.expr().Length];
for (int i = 0; i < Tree.Length; i++)
{
Tree[i] = visitor.VisitExpr(context.expr(i));
}
}
Element ParseExpression(DeltinScriptParser.ExprContext context)
{
// If the expression is a(n)...
#region Operation
// 0 1 2
// (expr operation expr)
// count == 3
if (context.ChildCount == 3 &&
(Constants.MathOperations.Contains(context.GetChild(1).GetText()) ||
Constants.CompareOperations.Contains(context.GetChild(1).GetText()) ||
Constants.BoolOperations.Contains(context.GetChild(1).GetText())))
{
Element left = ParseExpression(context.GetChild(0) as DeltinScriptParser.ExprContext);
string operation = context.GetChild(1).GetText();
Element right = ParseExpression(context.GetChild(2) as DeltinScriptParser.ExprContext);
if (Constants.BoolOperations.Contains(context.GetChild(1).GetText()))
{
if (left.ElementData.ValueType != Elements.ValueType.Any && left.ElementData.ValueType != Elements.ValueType.Boolean)
{
throw new SyntaxErrorException($"Expected boolean datatype, got {left .ElementData.ValueType.ToString()} instead.", context.start);
}
if (right.ElementData.ValueType != Elements.ValueType.Any && right.ElementData.ValueType != Elements.ValueType.Boolean)
{
throw new SyntaxErrorException($"Expected boolean datatype, got {right.ElementData.ValueType.ToString()} instead.", context.start);
}
}
switch (operation)
{
case "^":
return(Element.Part <V_RaiseToPower>(left, right));
case "*":
return(Element.Part <V_Multiply>(left, right));
case "/":
return(Element.Part <V_Divide>(left, right));
case "+":
return(Element.Part <V_Add>(left, right));
case "-":
return(Element.Part <V_Subtract>(left, right));
case "%":
return(Element.Part <V_Modulo>(left, right));
// COMPARE : '<' | '<=' | '==' | '>=' | '>' | '!=';
case "&":
return(Element.Part <V_And>(left, right));
case "|":
return(Element.Part <V_Or>(left, right));
case "<":
return(Element.Part <V_Compare>(left, Operators.LessThan, right));
case "<=":
return(Element.Part <V_Compare>(left, Operators.LessThanOrEqual, right));
case "==":
return(Element.Part <V_Compare>(left, Operators.Equal, right));
case ">=":
return(Element.Part <V_Compare>(left, Operators.GreaterThanOrEqual, right));
case ">":
return(Element.Part <V_Compare>(left, Operators.GreaterThan, right));
case "!=":
return(Element.Part <V_Compare>(left, Operators.NotEqual, right));
}
}
#endregion
#region Not
if (context.GetChild(0) is DeltinScriptParser.NotContext)
{
return(Element.Part <V_Not>(ParseExpression(context.GetChild(1) as DeltinScriptParser.ExprContext)));
}
#endregion
#region Number
if (context.GetChild(0) is DeltinScriptParser.NumberContext)
{
var number = context.GetChild(0);
double num = double.Parse(number.GetChild(0).GetText());
/*
* // num will have the format expr(number(X)) if positive, expr(number(neg(X))) if negative.
* if (number.GetChild(0) is DeltinScriptParser.NegContext)
* // Is negative, use '-' before int.parse to make it negative.
* num = -double.Parse(number.GetChild(0).GetText());
* else
* // Is positive
* num = double.Parse(number.GetChild(0).GetText());
*/
return(new V_Number(num));
}
#endregion
#region Boolean
// True
if (context.GetChild(0) is DeltinScriptParser.TrueContext)
{
return(new V_True());
}
// False
if (context.GetChild(0) is DeltinScriptParser.FalseContext)
{
return(new V_False());
}
#endregion
#region String
if (context.GetChild(0) is DeltinScriptParser.StringContext)
{
return(V_String.ParseString(
context.start,
// String will look like "hey this is the contents", trim the quotes.
(context.GetChild(0) as DeltinScriptParser.StringContext).STRINGLITERAL().GetText().Trim('\"'),
null
));
}
#endregion
#region Formatted String
if (context.GetChild(1) is DeltinScriptParser.StringContext)
{
Element[] values = context.expr().Select(expr => ParseExpression(expr)).ToArray();
return(V_String.ParseString(
context.start,
(context.GetChild(1) as DeltinScriptParser.StringContext).STRINGLITERAL().GetText().Trim('\"'),
values
));
}
#endregion
#region null
if (context.GetChild(0) is DeltinScriptParser.NullContext)
{
return(new V_Null());
}
#endregion
#region Group ( expr )
if (context.ChildCount == 3 && context.GetChild(0).GetText() == "(" &&
context.GetChild(1) is DeltinScriptParser.ExprContext &&
context.GetChild(2).GetText() == ")")
{
Console.WriteLine("Group type:" + context.GetChild(0).GetType());
return(ParseExpression(context.GetChild(1) as DeltinScriptParser.ExprContext));
}
#endregion
#region Method
if (context.GetChild(0) is DeltinScriptParser.MethodContext)
{
return(ParseMethod(context.GetChild(0) as DeltinScriptParser.MethodContext, true));
}
#endregion
#region Variable
if (context.GetChild(0) is DeltinScriptParser.VariableContext)
{
return(DefinedVar.GetVar((context.GetChild(0) as DeltinScriptParser.VariableContext).PART().GetText(), context.start).GetVariable(new V_EventPlayer()));
}
#endregion
#region Array
if (context.ChildCount == 4 && context.GetChild(1).GetText() == "[" && context.GetChild(3).GetText() == "]")
{
return(Element.Part <V_ValueInArray>(
ParseExpression(context.expr(0) as DeltinScriptParser.ExprContext),
ParseExpression(context.expr(1) as DeltinScriptParser.ExprContext)));
}
#endregion
#region Create Array
if (context.ChildCount >= 4 && context.GetChild(0).GetText() == "[")
{
var expressions = context.expr();
V_Append prev = null;
V_Append current = null;
for (int i = 0; i < expressions.Length; i++)
{
current = new V_Append()
{
ParameterValues = new object[2]
};
if (prev != null)
{
current.ParameterValues[0] = prev;
}
else
{
current.ParameterValues[0] = new V_EmptyArray();
}
current.ParameterValues[1] = ParseExpression(expressions[i]);
prev = current;
}
return(current);
}
#endregion
#region Empty Array
if (context.ChildCount == 2 && context.GetText() == "[]")
{
return(Element.Part <V_EmptyArray>());
}
#endregion
#region Seperator/enum
if (context.ChildCount == 3 && context.GetChild(1).GetText() == ".")
{
Element left = ParseExpression(context.GetChild(0) as DeltinScriptParser.ExprContext);
string variableName = context.GetChild(2).GetChild(0).GetText();
DefinedVar var = DefinedVar.GetVar(variableName, context.start);
return(var.GetVariable(left));
}
#endregion
throw new Exception($"What's a {context.GetType().Name}?");
}
public override Node VisitExpr(DeltinScriptParser.ExprContext context)
{
Node node;
// Operations
if (context.ChildCount == 3 && Constants.AllOperations.Contains(context.GetChild(1).GetText()))
{
Node left = Visit(context.GetChild(0));
string operation = context.GetChild(1).GetText();
Node right = Visit(context.GetChild(2));
node = new OperationNode(left, operation, right, new Location(file, Range.GetRange(context)));
}
// Getting values in arrays
else if (context.ChildCount == 4 &&
context.GetChild(0) is DeltinScriptParser.ExprContext &&
context.GetChild(1).GetText() == "[" &&
context.GetChild(2) is DeltinScriptParser.ExprContext &&
context.GetChild(3).GetText() == "]")
{
Node value = Visit(context.GetChild(0));
Node index = Visit(context.GetChild(2));
node = new ValueInArrayNode(value, index, new Location(file, Range.GetRange(context)));
}
// Seperator
else if (context.SEPERATOR() != null && context.expr().Length >= 2)
{
node = new ExpressionTreeNode(context, this);
}
// Not
else if (context.ChildCount == 2 &&
context.GetChild(0).GetText() == "!" &&
context.GetChild(1) is DeltinScriptParser.ExprContext)
{
Node value = Visit(context.GetChild(1));
node = new NotNode(value, new Location(file, Range.GetRange(context)));
}
// Ternary Condition
else if (context.ChildCount == 5 &&
context.GetChild(0) is DeltinScriptParser.ExprContext &&
context.GetChild(1).GetText() == "?" &&
context.GetChild(2) is DeltinScriptParser.ExprContext &&
context.GetChild(3).GetText() == ":" &&
context.GetChild(4) is DeltinScriptParser.ExprContext)
{
Node condition = VisitExpr(context.expr(0));
Node consequent = VisitExpr(context.expr(1));
Node alternative = VisitExpr(context.expr(2));
node = new TernaryConditionalNode(condition, consequent, alternative, new Location(file, Range.GetRange(context)));
}
// This
else if (context.THIS() != null)
{
node = new ThisNode(new Location(file, Range.GetRange(context)));
}
else
{
return(Visit(context.GetChild(0)));
}
return(node);
}