how to return the poition in the input string where the token is found

[Maansi Gupta]

Hi,

We are trying to develop a friendly IDE for our own
grammer. For this purpose we have created a Lexer
which is taking input from a string buffer.

The user enters the script in a rich edit control. The
lexer is called after each character. 

Once a token is recognized we need to call a function
in the action part of the lexer, that would return the
position of the character in the string.

For example if input string is "x+y". Where "+" is the
token to be identified, the function needs to pass the
position of "+" in the string i.e. 2.

I am unable to find any means to return this
position.Please help regarding this

Thanks 


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