private AST ValueFactor()
{
AST valueAST = ValueEntity();
while (currentToken.Type == TokenType.MUL || currentToken.Type == TokenType.DIV || currentToken.Type == TokenType.BCMUL || currentToken.Type == TokenType.BCDIV)
{
OperatorToken binOpToken = Eat(currentToken.Type) as OperatorToken;
valueAST = new ValBinOpAST(valueAST, binOpToken, ValueEntity());
}
return(valueAST);
}
private AST ValueEntity()
{
AST valueAST = Value();
while (currentToken.Type == TokenType.CARET || currentToken.Type == TokenType.BCPOW)
{
OperatorToken binOpToken = Eat(currentToken.Type) as OperatorToken;
valueAST = new ValBinOpAST(valueAST, binOpToken, Value());
}
return(valueAST);
}
private AST ValueExpr()
{
AST valueFactorAST = ValueFactor();
while (currentToken.Type == TokenType.PLUS || currentToken.Type == TokenType.MINUS)
{
OperatorToken binOpToken = Eat(currentToken.Type) as OperatorToken;
valueFactorAST = new ValBinOpAST(valueFactorAST, binOpToken, ValueFactor());
}
return(valueFactorAST);
}
private object Visit(ValBinOpAST valBinOpAST)
{
Signal left = new Signal(Visit(valBinOpAST.Left));
Signal right = new Signal(Visit(valBinOpAST.Right));
try
{
switch (valBinOpAST.Operator.Value)
{
case "+":
return((left + right).Unpack());
case "-":
return((left - right).Unpack());
case "*":
return((left * right).Unpack());
case "/":
if (right.Unpack() is double v && v == 0)
{
throw logger.Error(new SemanticException(valBinOpAST.Right.FindToken(), "0 Division"));
}
return((left / right).Unpack());
case "^":
return((left.RaiseToPower(right)).Unpack());
case ".*":
return((left.BroadcastMultiply(right)).Unpack());
case "./":
return((left.BroadcastDivide(right)).Unpack());
case ".^":
return((left.BroadcastPower(right)).Unpack());
default:
throw logger.Error(new SemanticException(valBinOpAST.FindToken(), "Invalid operator"));
}
}
catch (LigralException)
{
throw logger.Error(new SemanticException(valBinOpAST.FindToken(), "Calculation fault"));
}
catch (System.Exception e)
{
throw logger.Error(new SemanticException(valBinOpAST.FindToken(), e.Message));
}
}
