static Expression ParseRelational(Token[] toks, ref int p)
{
var end = toks.Length;
var e = ParseAdditive (toks, ref p);
if (p < end && (toks[p].Type == TokenType.LessThan || toks[p].Type == TokenType.LessThanOrEqual ||
toks[p].Type == TokenType.GreaterThan || toks[p].Type == TokenType.GreaterThanOrEqual)) {
var op = toks[p].Type;
p++;
var o = ParseAdditive (toks, ref p);
e = new BinOpExpression (op, e, o);
}
return e;
}
static Expression ParseMultiplicative(Token[] toks, ref int p)
{
var end = toks.Length;
var e = ParseUnary (toks, ref p);
while (p < end && (toks[p].Type == TokenType.Multiply || toks[p].Type == TokenType.Divide)) {
var op = toks[p].Type;
p++;
var o = ParseUnary (toks, ref p);
e = new BinOpExpression (op, e, o);
}
return e;
}
static Expression ParseConditionalOr(Token[] toks, ref int p)
{
var end = toks.Length;
var e = ParseConditionalAnd (toks, ref p);
while (p < end && toks[p].Type == TokenType.LogicalOr) {
p++;
var o = ParseConditionalAnd (toks, ref p);
e = new BinOpExpression (TokenType.LogicalOr, e, o);
}
return e;
}
static Expression ParseEquality(Token[] toks, ref int p)
{
var end = toks.Length;
var e = ParseRelational (toks, ref p);
if (p < end && (toks[p].Type == TokenType.Equal || toks[p].Type == TokenType.NotEqual)) {
var op = toks[p].Type;
p++;
var o = ParseRelational (toks, ref p);
e = new BinOpExpression (op, e, o);
}
return e;
}
static Expression ParseAdditive(Token[] toks, ref int p)
{
var end = toks.Length;
var e = ParseMultiplicative (toks, ref p);
while (p < end && (toks[p].Type == TokenType.Add || toks[p].Type == TokenType.Subtract)) {
var op = toks[p].Type;
p++;
var o = ParseMultiplicative (toks, ref p);
e = new BinOpExpression (op, e, o);
}
return e;
}
