I'm looking for a module or sub that I can customzie to replace arbitrary escape strings with other values. Think replacement like shell PS1.

$string = '\u $';
#should become
#'username $'

#ideally it would be implimented w/ a loop/switch
while (#some magic) {
  switch ($1) {
    case "\u" { # $1 = $ENV{USER} }
    ...
  }
}

# or maybe a call to a sub

replace($str,
  "\u" => $ENV{USER}, # replace \u with USER env var
  "\f" => sub { 'foo' }, # replace \f with the result of sub
  "\r\{([^}]+)}" = > sub { reverse($_[1] }, # replace \r{...} with str
+ing in braces reversed
  "\(?:\d\d\d)" => sub { chr($_[1] } # replace 3 numbers with the corr
+esponding character number
};

[download]

It turns out searching google for perl+escape perl+replace+escape and similar produces a lot of results that are not what I'm looking for.

If you're google-fu is stronger or you know of a sub/code snippet/module that would do what I am looking for I would appreciate it.

-Alan

In reply to replace escape sequences in a string by alanwevans

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