private ASTNode GetTwoParamOperatorPrecedence(ASTNode left, ASTNode @operator, ASTNode right)
{
if (!ManualPrecedenceOperators.Contains(@operator.NodeType) || !(ManualPrecedenceOperators.Contains(right.NodeType)))
{
@operator.Children[0] = left;
@operator.Children[1] = right;
return(@operator);
}
// Lower numbers is higher precedence
int operatorPriority = OperatorPrecedences[@operator.NodeType],
rightPriority = OperatorPrecedences[right.NodeType];
// Right has stronger precedence
if (operatorPriority > rightPriority)
{
@operator.Children[0] = left;
@operator.Children[1] = right;
return(@operator);
}
// Left has stronger precedence
if (right.Children.Count == 0)
{
throw new InvalidOperationException("Manual precedence operator AST Node did not have at least one child during precedence resolution - how'd this happen?");
}
@operator.Children[0] = left;
@operator.Children[1] = right.Children[0];
right.Children[0] = @operator;
return(right);
}
private ASTNode GetUnaryOperatorPrecedence(ASTNode @operator, ASTNode operand)
{
if (!ManualPrecedenceOperators.Contains(operand.NodeType))
{
@operator.Children[0] = operand;
return(@operator);
}
// Lower numbers is higher precedence
int operatorPriority = OperatorPrecedences[@operator.NodeType],
rightPriority = OperatorPrecedences[operand.NodeType];
// Right has stronger precedence
if (operatorPriority >= rightPriority)
{
@operator.Children[0] = operand;
return(@operator);
}
// Left has stronger precedence
if (operand.Children.Count != 2)
{
throw new InvalidOperationException("Manual precedence operator AST Node did not have two children during precedence resolution - how'd this happen?");
}
@operator.Children[0] = operand.Children[0];
operand.Children[0] = @operator;
return(operand);
}
