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11 commits

Author SHA1 Message Date
Max Brunsfeld
59236d2ed1 Avoid redundant character comparisons in generated lex function 2017-07-10 14:09:31 -07:00
Max Brunsfeld
1586d70cbe Compute conflicting tokens more precisely 
While generating the parse table, keep track of which tokens can follow one another.
Then use this information to evaluate token conflicts more precisely. This will
result in a smaller parse table than the previous, overly-conservative approach.
 2017-07-07 17:54:24 -07:00
Max Brunsfeld
d8e9d04fe7 Add PREC_DYNAMIC rule for resolving runtime ambiguities 2017-07-06 15:24:45 -07:00
Max Brunsfeld
cb652239f6 Add missing semicolons in flatten_grammar test 2017-07-06 12:48:50 -07:00
Max Brunsfeld
2c043803f1 Be more conservative about avoiding lexing conflicts when merging states 
This fixes a bug in the C++ grammar where the `>>` token was merged into
a state where it was previously not valid, but the `>` token *was*
valid. This caused nested templates like -

std::vector<std::pair<int, int>>

to not parse correctly.
 2017-06-22 15:32:13 -07:00
Max Brunsfeld
ed8fbff175 Allow anonymous tokens to be used in grammars' external token lists 2017-03-17 16:31:29 -07:00
Max Brunsfeld
e2baf0930b Use simple CharacterSet constructor in LexItem test 2017-03-17 14:47:11 -07:00
Max Brunsfeld
b3edd8f749 Remove use of shared_ptr in choice, repeat, and seq factories 2017-03-17 14:28:13 -07:00
Max Brunsfeld
db4b9ebc7c Implement Rule as a union rather than an abstract base class 2017-03-17 13:29:31 -07:00
Max Brunsfeld
d222dbb9fd Allow lexer to accept tokens that ended at previous positions 
* Track lookahead in each tree
* Add 'mark_end' API that external scanners can use
 2017-03-13 17:06:52 -07:00
Max Brunsfeld
6dc0ff359d Rename spec -> test 
'Test' is a lot more straightforward of a name.
 2017-03-09 20:40:01 -08:00