I like that idea, but it's not really available AFAICT.
The function eachmatch(::Regex, ::String) gives you an iterator over the
match objects.
In any case, I had a little play with this for fun :) - so here's one way
to do it:
(n.b. the function arguments don't really need to be typed, I just do it to
make the code clearer to read):
replacerange(s::AbstractString, replacement::AbstractString,
range::UnitRange{Int64}) =
s[1:range.start-1]*replacement*s[range.stop+1:end]
replacematches(s::AbstractString, r::Regex, f::Function) =
foldl((_s,m) -> begin
offsetd = length(_s) - length(s) #needed because previous replaces
may change the length of _s
repl_range = (offsetd + m.offset):(offsetd + m.offset +
length(m.match)-1)
replacerange(_s, f(m), repl_range)
end, s, eachmatch(r,s))
y = "time format 02:45pm, 14:20, 03:45am"
replacematches(y, r"([01]\d)(:[0-6]\d)(am|pm)"i,
x->lowercase(x.captures[3])=="am"?x.match[1:end-2]:string(parse(Int,
x.captures[1])+12, x.captures[2]))
"time format 14:45, 14:20, 03:45"
