tokenize-postscript-pmb

Parse the subset of PostScript that I understand.

API

Token Objects

Tokens are reported as objects that have some of these properties.

• t: type symbol. This is the only property that's always present on every token object.
• v: value.
• x: true if the object is executable, '//' if the object is to be executed immediately, undefined or some other false-y value for literal objects.
• w: Whitespace that was found in front of the token.

Upgraded versions include:

• T: The type name as string, or a false-y value for unsupported types.

Usage

from test/usage.js:       (input → result)

var makeTokenizer = require('tokenize-postscript-pmb'),
  psCode = fixture('input/usage.ps'),
  parseOpt = { ignWsp: false },
  tokenize = makeTokenizer(psCode, parseOpt),
  tokens = tokenize(),
  expected = fixture.json('expect/usage.tokens'),
  equal = require('equal-pmb');
 
equal(tokenize.remainder(), '');
equal.lists(tokens, expected);

Known issues

• needs more/better tests and docs

Reference

• Syntax: PostScript Language Reference Manual (PLRM, "red book") version 3, ch. 3.2 "Syntax".

 

License

ISC