anachronauts / jeff65 / 249

93%

master: 88%

Pull #38

travis-ci

Teach parser generator how to handle simple alternations

A symbol can now be replaced with a tuple of symbols on the right-hand
side of a rule, indicating that either is acceptable in that position.
This has two effects:

 - makes the grammar less repetitive, especially for operators.

 - makes the generated parser slightly more efficient, as some states
   can now be merged.

This has been used to simplify the main grammar. Also, BITNOT should
have been unary; this has been corrected.

438 of 503 branches covered (87.08%)

Branch coverage included in aggregate %.

554 of 554 new or added lines in 6 files covered. (100.0%)

1438 of 1613 relevant lines covered (89.15%)

2.67 hits per line