IExpression Addition(ImmutableList <string> symbols)
{
var left = Multiplication(symbols);
while (Match(TokenTag.Add, TokenTag.Subtract) is Token token)
{
var op = tokenOp[token.Tag];
var right = Multiplication(symbols);
left = new OperatorBinary(token.Position, op, left, right);
}
return(left);
}
IExpression Multiplication(ImmutableList <string> symbols)
{
var left = Unary(symbols);
while (Match(TokenTag.Multiply, TokenTag.Divide, TokenTag.Mod) is Token token)
{
var op = tokenOp[token.Tag];
var right = Unary(symbols);
left = new OperatorBinary(token.Position, op, left, right);
}
return(left);
}
IExpression Relation(ImmutableList <string> symbols)
{
var left = Addition(symbols);
while (Match(TokenTag.GreaterThan, TokenTag.GreaterThanOrEqualTo, TokenTag.LessThan, TokenTag.LessThanOrEqualTo) is Token token)
{
var op = tokenOp[token.Tag];
var right = Addition(symbols);
left = new OperatorBinary(token.Position, op, left, right);
}
return(left);
}
