2014-08-25 11:12 GMT+02:00 Usman Bhatti <usman.bhatti@gmail.com>:

I understand that context is important when parsing a program for certain parsing related information.

In my case, I am using PetitParser more as a syntax highlighter on the lines of PPTextHighlighter and in that case you dont need much of contextual information. All you need is token positions. Can we envisage, for such usage, a simplistic but more robust parser?

If you're more into that, then a lexer may be enough and a very efficient one can be built with SmaCC.

What you're doing doesn't seems to require a parser: it is just matching

Keyword [^\n] *

isn't it?

Thierry

[|string allStyles text|

string := (PharoFilesOpener default changesFileOrNil contents copyFrom: 1 to: 60000).

text := string asText.

allStyles := {

'Announcement' -> TextColor green.

'Collections' -> TextColor blue.

'File' -> TextColor blue.

'Metacello' -> TextColor red.

'Monticello' -> TextColor magenta.

'Morphic' -> TextColor orange.

'Mooose' -> TextColor green.

'FAMIX' -> TextColor green.

'Roassal' -> TextColor green.

allStyles do: [ :assoc | ((assoc key asParser, #newline asParser negate star) matchingRangesIn: string) do: [:aRange | text addAttribute: (assoc value) from: aRange first to: aRange last] ].

text] timeToRun ==> 15 sec