private Expression ParseExpr(int precedence)
{
Expression ret = ParseFactor();
while (true)
{
TokenInfo t = Tokenizer.PeekToken();
if (!Helpers.IsBinaryOperator(t)) return ret;
Operator op = GetBinaryOperator(t);
int prec = GetOperatorPrecedence(op);
if (prec >= precedence)
{
GetNextToken();
t = Tokenizer.PeekToken();
if (EatOptional(Token.EOL))
{
statementSymbols.Add(t);
}
Expression right = ParseExpr(prec + 1);
//SourceLocation start = ret.Location.Start;
var sourceData =
new SourceData(
new SourceSpan(ret.SourceData.SourceSpan.Start, right.SourceData.SourceSpan.End), SourceFile,
statementSymbols);
ret = new BinaryExpression(statement, op, ret, right, sourceData);
//ret.SetLoc(start, this.Tokenizer.GetSourceLocation());
}
else
{
return ret;
}
}
}
private Expression ParsePower()
{
Expression ret = ParsePrimary();
//ret = AddTrailers(ret);
if (EatOptional(Token.Caret))
{
Expression right = ParseFactor();
var sourceData =
new SourceData(new SourceSpan(ret.SourceData.SourceSpan.Start, right.SourceData.SourceSpan.End),
SourceFile, statementSymbols);
ret = new BinaryExpression(statement, Operator.Power, ret, right, sourceData);
}
return ret;
}
private Expression ParseCompExpr()
{
isComparisonExpression = true;
Expression ret = ParseExpression();
TokenInfo token;
while (true)
{
Operator op;
token = Tokenizer.PeekToken();
switch (token.Token)
{
case Token.Equality:
GetNextToken();
op = Operator.Equal;
break;
case Token.Inequality:
GetNextToken();
op = Operator.NotEquals;
break;
case Token.Is:
GetNextToken();
op = Operator.Is;
break;
case Token.IsNot:
GetNextToken();
op = Operator.IsNot;
break;
default:
isComparisonExpression = false;
return ret;
}
Expression rhs = ParseCompExpr();
var sourceData =
new SourceData(new SourceSpan(ret.SourceData.SourceSpan.Start, rhs.SourceData.SourceSpan.End),
SourceFile, statementSymbols);
var be = new BinaryExpression(statement, op, ret, rhs, sourceData);
//be.SetLoc(ret.Start, GetEnd());
ret = be;
}
}
