Expression AndExpression()
{
Expression ret = EqualityExpression();
while (Current.TokenKind == TokenKind.OpAnd)
{
Consume(); // Or
Expression rhs = EqualityExpression();
ret = new BinaryExpression(ret.Line, ret.Col, ret, TokenKind.OpAnd, rhs);
}
return ret;
}
private Expression EqualityExpression()
{
Expression ret = RelationalExpression();
while (Current.TokenKind == TokenKind.OpIs
|| Current.TokenKind == TokenKind.OpIsNot)
{
Token tok = Consume(); // consume operator
Expression rhs = RelationalExpression();
ret = new BinaryExpression(ret.Line, ret.Col, ret, tok.TokenKind, rhs);
}
return ret;
}
private Expression RelationalExpression()
{
Expression ret = PrimaryExpression();
while (Current.TokenKind == TokenKind.OpLt
|| Current.TokenKind == TokenKind.OpLte
|| Current.TokenKind == TokenKind.OpGt
|| Current.TokenKind == TokenKind.OpGte)
{
Token tok = Consume(); // consume operator
Expression rhs = PrimaryExpression();
ret = new BinaryExpression(ret.Line, ret.Col, ret, tok.TokenKind, rhs);
}
return ret;
}
Expression OrExpression()
{
Expression ret = AndExpression();
while (Current.TokenKind == TokenKind.OpOr)
{
Consume(); // Or
Expression rhs = AndExpression();
ret = new BinaryExpression(ret.Line, ret.Col, ret, TokenKind.OpOr, rhs);
}
return ret;
}