Getting pickaxe to perform looser matches, or regex matching

I am a regular user of gitk's nice pickaxe search field. But it will often fail to find what I am looking for because the part of the string I can provide is not the part that changes.

For example, I am looking for patches that change any calls to function foo(). I want to match on

- foo(1, 0, 1024)
+ foo(0, 1024, 1)

but I don't know the parameters. As the "pickaxe" sections in gitdiffcore and git log manpages indicate, it won't match on -S'foo' because foo itself was not added or removed.

A regex like "foo(.*" would work, but pickaxe doesn't seem to take regexes, and while I could roll my own wrapper around git-log --patch, this sounds like an important and useful variant to pickaxe that is missing.

Or that has a hidden switch I haven't found ;-)

m
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 martin@laptop.org -- Software Architect - OLPC
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