remix

remix

regular expression alternation for tokenizers

Mixing

/* unnammed prositional only matches */
var re = new Re([/foo/, /bar/]);

/* does not combine */
var re = new Re([/foo/, /bar/i]);

Named matches

• example 1

var Re = require('remix').ReMix;

/* named match */
var re = new Re('foo', /foo/, /bar/);
re.on('foo', function (name, match) {
  /* 1st time ['foo', 3] */
  /* 2nd time ['bar', 6] */
  console.log(match);
});
var str = 'foobar';
/* [['foo', 3], [undefined]] */
console.log(re.exec(str));
/* [[undefined], ['bar', 6]] */
console.log(re.exec(str));

• example 2

/* embedded matches are namespaced with parent name */
var re = new Re('foo', {foo: /foo/, bar: /bar/});
re.on('foo.bar', function (name, match) {
  /* ['bar', 6] */
  console.log(match);
});
re.on('foo.foo', function (name, match) {
  /* ['foo', 3] */
  console.log(match);
});
re.on('foo.*', function (name, match) {
  /* 1st time ['foo', 3] */
  /* 2nd time ['bar', 6] */
  console.log(match);
});

var str = 'foobar';
/* [['foo', 3], [undefined]] */
console.log(re.exec(str));
/* [[undefined], ['bar', 6]] */
console.log(re.exec(str));


/* alternative syntax */
var re = new Re('foo', [/foo/, /bar/]);

/* embedded named matches */
var re = new Re({foo: /foo/, bar: /bar/});

• template examples

Re.register('matchFoo', /foo/);
var re = new Re('foo', 'matchFoo');

var re = new Re('bar', '`matchFoo*`|bar');

Re.register('matchFooOrBar', '`matchFoo`|bar');
var re = new Re('bax', '\\s*`matchFooOrBar+`\\s*');