Matching 'Capitalized' words in Vim

Question

I'm trying to use the following regex to match 'Capitalized' words:

"\l\@<!\<\u\w\+"

Which matches 'Main' and 'Canvas' in:

public class Main extends Canvas

Or another example, matches all occurrences of 'Bitmap':

public Bitmap b = new Bitmap(); And InputHandler in:

addKeyListener(new InputHandler())

This works fairly nice when used in search mode but not completely when using syntax match in a syntax file, where the command would be:

syntax match Capitalized "\l\@<!\<\u\w\+" This does not match anything that is inside parenthesis. Take one example from above:

addKeyListener(new InputHandler()) InputHandler is matched in search mode, but not from a syntax match command.

Am I missing something?

Answer 1

Thank you so very much @KarlYngveLervåg for pointing out :h :syn-containedin, it leaded me towards the solution:

syntax match Capitalized "\l\@<!\<\u\w\+" containedin=parenGroup

Where parenGroup in my case is a 'syntax region' that also contains the top cluster. More specifically the exact solution was (for java.vim):

syntax match Capitalized "\l\@<!\<\u\w\+" containedin=javaParenT

No need to define a new region or crazy parenthesis matching.

Note: If your parent region definition doesn't include the top cluster this might not work outside parenthesis!

Summarizing, vim syntax definitions has some gotchas!

Again , thanks!

---

Update! My previous solution would not match KeyEvent in:

if (input.keys[KeyEvent.VK_A])

Now changing the syntax specification to (java only!):

syntax match capitalInParen transparent matchgroup=javaParen start="(" end="\]\w\+)" contains=@javaTop
syntax match Capitalized "\l\@<!\<\u\w\+" containedin=capitalInParent

This is not perfect but still much better than the last one.