A simple set of regular expressions that make migrating from 2.2 to 3.0 easy
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README.md

README.md

Swift-2.2-to-3.0-RegEx

A simple set of regular expressions that make migrating from 2.2 to 3.0 easy by running a project wide find and replace with regular expressions (see this blog post for details if you aren't sure how to do that). Essentially this will save you from having to use XCode's fix-it's one at a time.

These have been listed in order you should apply (for example, the more complex c-style for loop replacements first, before you get to simpler uses of ++ and --.

If you have any fixes, improvements or additions, please fork and create a pull request. I would love to receive other contributions. If you are not a RegEx guru, then please raise issues using the GitHub system.

Replacing standard 'less-than' C-style for loops

Regular Expression: for[ \t]+var[ \t]+(i)[ \t]*=[ \t]*([\d]+|[:alnum:]+)[ \t]*;[ \t]*\1[ \t]*<[ \t]*([\d]+|[:alnum:]+)[ \t]*;[ \t]*\1\+\+

Replace with for var $1 in $2..<$3

For example

  for var i=0;i<10;i++{

Would become

  for i in 0..<10{

Replacing standard 'less-than-or-equal-to' C-style for loops

Regular Expression: for[ \t]+var[ \t]+(i)[ \t]*=[ \t]*([\d]+|[:alnum:]+)[ \t]*;[ \t]*\1[ \t]*<=[ \t]*([\d]+|[:alnum:]+)[ \t]*;[ \t]*\1\+\+

Replace with for var $1 in $2...$3

For example

  for var i=0;i<=10;i++{

Would become

  for i in 0...10{

Replacing ++/--<var> in parameters

Regular Expression: (^[ \t]*[:alnum:]+)(\(|,)[ \t]*([\+-]){2}([:alnum:]+)

Replace with $4$3=1\n$1$2$4

For example

  someFunction(++i,other)

Would become

  i+=1
  someFunction(i,other)

Replacing <var>++/-- in inline code

Regular Expression: ([:alnum:]+)([\+-]){2}

Replace with $1$2=1

For example

  i++

Would become

  i+=1

Replace ++/--<var> in free space

Regular Expression: ^[ \t]*([\+-]){2}([:alnum:]+)

Replace with $2$1=1

For example

  ++i

Would become

  i+=1