void ParseVarset(ScopeGroup getter, ScopeGroup scope, VarSetNode varSetNode)
{
var varSetData = new ParseExpressionTree(this, getter, scope, varSetNode.Variable);
if (!(varSetData.ResultingVariable is IndexedVar))
{
throw SyntaxErrorException.VariableIsReadonly(varSetData.ResultingVariable.Name, varSetNode.Location);
}
IndexedVar variable = (IndexedVar)varSetData.ResultingVariable;
Element[] index = varSetData.VariableIndex;
Element value = null;
if (varSetNode.Value != null)
{
value = ParseExpression(getter, scope, varSetNode.Value);
}
Element initialVar = variable.GetVariable(varSetData.Target);
Operation?operation = null;
switch (varSetNode.Operation)
{
case "+=":
operation = Operation.Add;
break;
case "-=":
operation = Operation.Subtract;
break;
case "*=":
operation = Operation.Multiply;
break;
case "/=":
operation = Operation.Divide;
break;
case "^=":
operation = Operation.RaiseToPower;
break;
case "%=":
operation = Operation.Modulo;
break;
case "++":
operation = Operation.Add;
value = 1;
break;
case "--":
operation = Operation.Subtract;
value = 1;
break;
}
if (operation == null)
{
Actions.AddRange(variable.SetVariable(value, varSetData.Target, index));
}
else
{
Actions.AddRange(variable.ModifyVariable((Operation)operation, value, varSetData.Target, index));
}
}
public Element ParseExpression(ScopeGroup getter, ScopeGroup scope, Node expression)
{
switch (expression)
{
// Math and boolean operations.
case OperationNode operationNode:
{
Element left = ParseExpression(getter, scope, operationNode.Left);
Element right = ParseExpression(getter, scope, operationNode.Right);
/*
* if (Constants.BoolOperations.Contains(operationNode.Operation))
* {
* if (left.ElementData.ValueType != Elements.ValueType.Any && left.ElementData.ValueType != Elements.ValueType.Boolean)
* throw new SyntaxErrorException($"Expected boolean, got {left .ElementData.ValueType.ToString()} instead.", ((Node)operationNode.Left).Range);
*
* if (right.ElementData.ValueType != Elements.ValueType.Any && right.ElementData.ValueType != Elements.ValueType.Boolean)
* throw new SyntaxErrorException($"Expected boolean, got {right.ElementData.ValueType.ToString()} instead.", ((Node)operationNode.Right).Range);
* }
*/
switch (operationNode.Operation)
{
// Math: ^, *, %, /, +, -
case "^":
return(Element.Part <V_RaiseToPower>(left, right));
case "*":
return(left * right);
case "%":
return(left % right);
case "/":
return(left / right);
case "+":
return(left + right);
case "-":
return(left - right);
// BoolCompare: &&, ||
case "&&":
return(Element.Part <V_And>(left, right));
case "||":
return(Element.Part <V_Or>(left, right));
// Compare: <, <=, ==, >=, >, !=
case "<":
return(left < right);
case "<=":
return(left <= right);
case "==":
return(Element.Part <V_Compare>(left, EnumData.GetEnumValue(Operators.Equal), right));
case ">=":
return(left >= right);
case ">":
return(left > right);
case "!=":
return(Element.Part <V_Compare>(left, EnumData.GetEnumValue(Operators.NotEqual), right));
}
throw new Exception($"Operation {operationNode.Operation} not implemented.");
}
// Number
case NumberNode numberNode:
return(numberNode.Value);
// Bool
case BooleanNode boolNode:
if (boolNode.Value)
{
return(new V_True());
}
else
{
return(new V_False());
}
// Not operation
case NotNode notNode:
return(!(ParseExpression(getter, scope, notNode.Value)));
case InvertNode invertNode:
return(-ParseExpression(getter, scope, invertNode.Value));
// Strings
case StringNode stringNode:
Element[] stringFormat = new Element[stringNode.Format?.Length ?? 0];
for (int i = 0; i < stringFormat.Length; i++)
{
stringFormat[i] = ParseExpression(getter, scope, stringNode.Format[i]);
}
if (stringNode.Localized)
{
return(V_String.ParseString(stringNode.Location, stringNode.Value, stringFormat));
}
else
{
return(V_CustomString.ParseString(stringNode.Location, stringNode.Value, stringFormat));
}
// Null
case NullNode nullNode:
return(new V_Null());
// TODO check if groups need to be implemented here
// Methods
case MethodNode methodNode:
return(ParseMethod(getter, scope, methodNode, true));
// Variable
case VariableNode variableNode:
Element[] index = new Element[variableNode.Index.Length];
for (int i = 0; i < index.Length; i++)
{
index[i] = ParseExpression(getter, scope, variableNode.Index[i]);
}
Var var = scope.GetVar(getter, variableNode.Name, variableNode.Location);
if (!var.Gettable())
{
throw SyntaxErrorException.VariableIsReadonly(var.Name, variableNode.Location);
}
Element result = var.GetVariable();
for (int i = 0; i < index.Length; i++)
{
result = Element.Part <V_ValueInArray>(result, index[i]);
}
return(result);
// Get value in array
case ValueInArrayNode viaNode:
return(Element.Part <V_ValueInArray>(ParseExpression(getter, scope, viaNode.Value), ParseExpression(getter, scope, viaNode.Index)));
// Create array
case CreateArrayNode createArrayNode:
{
Element prev = null;
Element current = null;
for (int i = 0; i < createArrayNode.Values.Length; i++)
{
current = new V_Append()
{
ParameterValues = new IWorkshopTree[2]
};
if (prev != null)
{
current.ParameterValues[0] = prev;
}
else
{
current.ParameterValues[0] = new V_EmptyArray();
}
current.ParameterValues[1] = ParseExpression(getter, scope, createArrayNode.Values[i]);
prev = current;
}
return(current ?? new V_EmptyArray());
}
// Ternary Conditional (a ? b : c)
case TernaryConditionalNode ternaryNode:
return(Element.TernaryConditional
(
ParseExpression(getter, scope, ternaryNode.Condition),
ParseExpression(getter, scope, ternaryNode.Consequent),
ParseExpression(getter, scope, ternaryNode.Alternative)
));
// Enums
case EnumNode enumNode:
return(EnumData.ToElement(enumNode.EnumMember)
?? throw SyntaxErrorException.EnumCantBeValue(enumNode.Type, enumNode.Location));
// New object
case CreateObjectNode createObjectNode:
DefinedType typeData = ParserData.GetDefinedType(createObjectNode.TypeName, createObjectNode.Location);
return(typeData.New(createObjectNode, getter, scope, this));
// Expression tree
case ExpressionTreeNode expressionTree:
return(new ParseExpressionTree(this, getter, scope, expressionTree).ResultingElement);
// This
case ThisNode thisNode:
return(getter.GetThis(thisNode.Location));
// Type convert
case TypeConvertNode typeConvertNode:
DefinedType type = ParserData.GetDefinedType(typeConvertNode.Type, typeConvertNode.Location);
Element element = ParseExpression(getter, scope, typeConvertNode.Expression);
type.GetSource(this, element, typeConvertNode.Location);
return(element);
case RootNode rootNode: throw new SyntaxErrorException("'root' cannot be used like an expression.", rootNode.Location);
}
throw new Exception();
}