protected TypeValidationResult CheckType(PrimitiveType leftType, PrimitiveType rightType, PrimitiveType returnType, string operatorName)
{
var leftResult = Left.CheckType();
if (leftResult.HasError)
{
return(leftResult);
}
if (leftResult.Type.Equals(leftType) == false)
{
return(TypeValidationResult.Invalid(Position, $"{operatorName} left expression is not {leftType}"));
}
var rightResult = Right.CheckType();
if (rightResult.HasError)
{
return(rightResult);
}
if (rightResult.Type.Equals(rightType) == false)
{
return(TypeValidationResult.Invalid(Position, $"{operatorName} right expression is not {rightType}"));
}
Type = returnType;
return(TypeValidationResult.Valid(Type));
}
public override TypeValidationResult CheckType()
{
if (SymbolTable.FormalExists(Value) == false)
{
return(TypeValidationResult.Invalid(Position, $"Use of undeclared identifier {Value} in function {SymbolTable.CurrentFunction}"));
}
Type = SymbolTable.FormalType(Value);
return(TypeValidationResult.Valid(Type));
}
public override TypeValidationResult CheckType()
{
var result = Expr.CheckType();
if (result.HasError)
{
return(result);
}
Type = result.Type;
return(TypeValidationResult.Valid(Type));
}
public override TypeValidationResult CheckType()
{
Type = new IntegerType();
var result = Right.CheckType();
if (result.HasError)
{
return(result);
}
if (Type.Equals(result.Type) == false)
{
return(TypeValidationResult.Invalid(Position, $"Negate operator called with expression which is not integer"));
}
return(TypeValidationResult.Valid(Type));
}
public override TypeValidationResult CheckType()
{
Type = new BooleanType();
return(TypeValidationResult.Valid(Type));
}
public override TypeValidationResult CheckType()
{
Type = new IntegerType();
return(TypeValidationResult.Valid(Type));
}