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| author | Kaz Kylheku <kaz@kylheku.com> | 2014-01-27 22:52:08 -0800 |
|---|---|---|
| committer | Kaz Kylheku <kaz@kylheku.com> | 2014-01-27 22:52:08 -0800 |
| commit | 681c02622c94ea17ebe417333e3dd078ee49ba5c (patch) | |
| tree | eacb631e69cc7b821b7d544319c86cd306a19d18 /ChangeLog | |
| parent | 05c9d8a60d75f58655b75f2fda3f2696a56637e6 (diff) | |
| download | txr-681c02622c94ea17ebe417333e3dd078ee49ba5c.tar.gz txr-681c02622c94ea17ebe417333e3dd078ee49ba5c.tar.bz2 txr-681c02622c94ea17ebe417333e3dd078ee49ba5c.zip | |
Lexing and parsing improvements, leaving things less hacky than before,
albeit hacky.
* parser.l (BSYM, NSYM): Regex definitions gone.
(BT0, BT1, BT2, NT0, NT1, NT2): New regex definitions.
(BTREG, BTKEY, NTREG, NTKEY): Rewritten, so that they cannot
match a lone @ character as a symbol name.
(grammar): Rules for returning METAPAR, METABKT and METAQUO
are gone. Instead, we just recognize a @ in the NESTED
and BRACED states and return it as a token.
* parser.y (METAPAR, METABKT, METAQUO): Token types removed.
(meta_expr): Nonterminal symbol removed.
('@'): New token type.
(list): Quotes and splices handling removed from this rule.
The new token '@' is handled here, on the other hand, because
there are places that reference the list rule that need to support
@ expressions.
(n_expr): Reference to meta_expr removed. Quote, unquote and splice
added here.
(yybadtoken): Removed references to METAPAR, METABKT and METAQUO.
Diffstat (limited to 'ChangeLog')
| -rw-r--r-- | ChangeLog | 24 |
1 files changed, 24 insertions, 0 deletions
@@ -1,5 +1,29 @@ 2014-01-27 Kaz Kylheku <kaz@kylheku.com> + Lexing and parsing improvements, leaving things less hacky than before, + albeit hacky. + + * parser.l (BSYM, NSYM): Regex definitions gone. + (BT0, BT1, BT2, NT0, NT1, NT2): New regex definitions. + (BTREG, BTKEY, NTREG, NTKEY): Rewritten, so that they cannot + match a lone @ character as a symbol name. + (grammar): Rules for returning METAPAR, METABKT and METAQUO + are gone. Instead, we just recognize a @ in the NESTED + and BRACED states and return it as a token. + + * parser.y (METAPAR, METABKT, METAQUO): Token types removed. + (meta_expr): Nonterminal symbol removed. + ('@'): New token type. + (list): Quotes and splices handling removed from this rule. + The new token '@' is handled here, on the other hand, because + there are places that reference the list rule that need to support + @ expressions. + (n_expr): Reference to meta_expr removed. Quote, unquote and splice + added here. + (yybadtoken): Removed references to METAPAR, METABKT and METAQUO. + +2014-01-27 Kaz Kylheku <kaz@kylheku.com> + * parser.y (yybadtoken): Handle METAQUO in switch. 2014-01-27 Kaz Kylheku <kaz@kylheku.com> |