private static ExpressionBase ParseClauseExtension(ExpressionBase clause, PositionalTokenizer tokenizer, OperationPriority priority)
{
do
{
var clauseEndLine = tokenizer.Line;
var clauseEndColumn = tokenizer.Column;
SkipWhitespace(tokenizer);
var joinerLine = tokenizer.Line;
var joinerColumn = tokenizer.Column;
switch (tokenizer.NextChar)
{
case '+':
if (priority == OperationPriority.AddSubtract && clause.Type == ExpressionType.StringConstant)
{
priority = OperationPriority.AppendString;
}
if (priority >= OperationPriority.AddSubtract)
{
return(clause);
}
tokenizer.Advance();
clause = ParseMathematic(tokenizer, clause, MathematicOperation.Add, joinerLine, joinerColumn);
break;
case '-':
if (priority >= OperationPriority.AddSubtract)
{
return(clause);
}
tokenizer.Advance();
clause = ParseMathematic(tokenizer, clause, MathematicOperation.Subtract, joinerLine, joinerColumn);
break;
case '*':
if (priority >= OperationPriority.MulDivMod)
{
return(clause);
}
tokenizer.Advance();
clause = ParseMathematic(tokenizer, clause, MathematicOperation.Multiply, joinerLine, joinerColumn);
break;
case '/':
if (priority >= OperationPriority.MulDivMod)
{
return(clause);
}
tokenizer.Advance();
clause = ParseMathematic(tokenizer, clause, MathematicOperation.Divide, joinerLine, joinerColumn);
break;
case '%':
if (priority >= OperationPriority.MulDivMod)
{
return(clause);
}
tokenizer.Advance();
clause = ParseMathematic(tokenizer, clause, MathematicOperation.Modulus, joinerLine, joinerColumn);
break;
case '=':
if (tokenizer.MatchSubstring("==") == 2)
{
if (priority >= OperationPriority.Compare)
{
return(clause);
}
tokenizer.Advance(2);
clause = ParseComparison(tokenizer, clause, ComparisonOperation.Equal, joinerLine, joinerColumn);
}
else
{
if (priority > OperationPriority.Assign)
{
return(clause);
}
tokenizer.Advance();
if (tokenizer.NextChar == '>')
{
tokenizer.Advance();
clause = AnonymousUserFunctionDefinitionExpression.ParseAnonymous(tokenizer, clause);
}
else
{
clause = ParseAssignment(tokenizer, clause, joinerLine, joinerColumn);
}
}
break;
case '!':
if (priority >= OperationPriority.Compare)
{
return(clause);
}
tokenizer.Advance();
if (tokenizer.NextChar != '=')
{
ParseError(tokenizer, "= expected following !", joinerLine, joinerColumn);
}
else
{
tokenizer.Advance();
clause = ParseComparison(tokenizer, clause, ComparisonOperation.NotEqual, joinerLine, joinerColumn);
}
break;
case '<':
if (priority >= OperationPriority.Compare)
{
return(clause);
}
tokenizer.Advance();
if (tokenizer.NextChar == '=')
{
tokenizer.Advance();
clause = ParseComparison(tokenizer, clause, ComparisonOperation.LessThanOrEqual, joinerLine, joinerColumn);
}
else
{
clause = ParseComparison(tokenizer, clause, ComparisonOperation.LessThan, joinerLine, joinerColumn);
}
break;
case '>':
if (priority >= OperationPriority.Compare)
{
return(clause);
}
tokenizer.Advance();
if (tokenizer.NextChar == '=')
{
tokenizer.Advance();
clause = ParseComparison(tokenizer, clause, ComparisonOperation.GreaterThanOrEqual, joinerLine, joinerColumn);
}
else
{
clause = ParseComparison(tokenizer, clause, ComparisonOperation.GreaterThan, joinerLine, joinerColumn);
}
break;
case '&':
if (tokenizer.MatchSubstring("&&") == 2)
{
if (priority >= OperationPriority.And)
{
return(clause);
}
tokenizer.Advance(2);
clause = ParseConditional(tokenizer, clause, ConditionalOperation.And, joinerLine, joinerColumn);
}
else
{
if (priority >= OperationPriority.BitwiseAnd)
{
return(clause);
}
tokenizer.Advance();
clause = ParseMathematic(tokenizer, clause, MathematicOperation.BitwiseAnd, joinerLine, joinerColumn);
}
break;
case '|':
if (priority >= OperationPriority.Or)
{
return(clause);
}
tokenizer.Advance();
if (tokenizer.NextChar != '|')
{
ParseError(tokenizer, "| expected following |", joinerLine, joinerColumn);
}
else
{
tokenizer.Advance();
clause = ParseConditional(tokenizer, clause, ConditionalOperation.Or, joinerLine, joinerColumn);
}
break;
default:
if (clause.Location.End.Column == 0)
{
clause.Location = new TextRange(clause.Location.Start, new TextLocation(clauseEndLine, clauseEndColumn));
}
return(clause);
}
if (clause.Type == ExpressionType.ParseError)
{
return(clause);
}
} while (true);
}
