fix parsing of boolean constants

[mklinik]

couldn't figure out how your tests work, so I used the spec sekeleton as
sol taught me.

[toothbrush]

"The lexeme parser reserved name parses symbol name, but it also checks that the name is not a prefix of a valid identifier. A reserved word is treated as a single token using try."

-- http://hackage.haskell.org/packages/archive/parsec/3.0.0/doc/html/Text-Parsec-Token.html

Translation: we want this.

[mklinik]

Yes, see the testcases. With your change, the first test runs fine, but "parses identifiers that start with 'true' and 'false' to identifiers" fails.

[mklinik]

The test setup from sol is very nice. You can either ghci test/Spec.hs and use main to run all tests, or ghci to an individual spec and run only that one with main

[toothbrush]

Yeah, I figured out the problem with using my way :) I think
I'll use sol's suite too. Thanks! I'll commit the merge sometime
soon (busy right now), just checking a few things.

On Mon, Apr 23, 2012 at 11:30:20 -0700, quoth Markus Klinik:

The test setup from sol is very nice. You can either ghci test/Spec.hs and use main to run all tests, or ghci to an individual spec and run only that one with main

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