Keywords do not support spaces/newlines

[dselman]

From some preliminary testing, it looks like keywords must be simple string literals. Is this by design? Is there another (better) way to achieve this?

Sample Nearley grammar using a Moo lexer:

@{%
const moo = require("moo");

const lexer = moo.compile({
  ws:     /[ \t]+/,
  number: /[0-9]+/,
  word: /[a-z]+/,
  times:  /\*|x/,
  SPACE: {match: /\s+/, lineBreaks: true},
  IDEN: {match: /[a-zA-Z]+/, keywords: {
        notice: ['NOTICE TO']
      }},
});
%}

# Pass your lexer object using the @lexer option:
@lexer lexer

# Use %token to match any token of that type instead of "token":
root -> %notice %ws %IDEN
{% (data) => {console.log(data);return data;} %}

Sample input:

NOTICE TO Foo

Output:

invalid syntax at line 1 col 1:

  NOTICE
  ^
Unexpected IDEN token: "NOTICE"
 {"offset":0,"token":{"type":"IDEN","value":"NOTICE","text":"NOTICE","offset":0,"lineBreaks":0,"line":1,"col":1}}

[nathan]

Duplicate of https://github.com/no-context/moo/issues/80