Have an option to trace only a range of lines

[mingodad]

When testing with non trivial source code the output of trace -tr can be long and sometimes we are only interested in a range of lines, would be nice to have a way to specify it, maybe something like:

ccparse -tr printAST,35119-35127 sqlite3.pp2.c

[mingodad]

For example executing ccparse -tr printAST sqlite3.pp2.c > sqlite3.pp2.c.ast result in a file of 203MB.

[smcpeak]

Seems like a reasonable idea and not too hard to implement. The interface should probably not use -tr, which is a general-purpose tracing facility that doesn't know about line numbers, etc. Instead, I think I'd do something like:

ccparse --range-trace printAST,35119-35127

However, when I have a need along these lines, what I typically do is first try to obtain an input file that is as small as possible while still demonstrating some behavior of interest. The "delta" tool at https://github.com/dsw/delta can do this automatically in many cases. Consequently, I'm normally working with input files that are small enough that further restriction based on line number is unnecessary.

Just to set expectations, I probably won't work on this, but you (or anyone else) are welcome to submit a pull request.