Replace if G is not before it on the same line

[sarathi]

I am trying to replace a symbol if 'G' is not found before the character on the same line. I am trying to use this:

~(?<!G)({|}|,|\(|\))~

But this only works if 'G' is right before the character. How could I allow for space after the 'G'.

[.josh]

Would help if you actually showed example content...

 

Any reason why you can't use a negated character class?

 

[^G]+

[sarathi]

Well, say I have the string "hello name my Gname is name"

I already have all instances of name turn blue with

~name~ >> <font color='blue'>name</font>

but I want name to only be replaced if there are no G's before it on the same line.