diff options
| author | Akim Demaille <akim.demaille@gmail.com> | 2018-07-09 13:10:40 +0200 |
|---|---|---|
| committer | Akim Demaille <akim.demaille@gmail.com> | 2018-08-11 18:09:29 +0200 |
| commit | 9c80fa286e14271598ded12c9f5c3f53f969981b (patch) | |
| tree | 6f573d534950f6896a206b8f6f153fa94cae33af | |
| parent | da8f4a2f5f69f094949c8bf0c7f9eca4493735ff (diff) | |
| download | bison-9c80fa286e14271598ded12c9f5c3f53f969981b.tar.gz | |
NEWS: update
| -rw-r--r-- | NEWS | 32 |
1 files changed, 30 insertions, 2 deletions
@@ -2,7 +2,23 @@ GNU Bison NEWS * Noteworthy changes in release ?.? (????-??-??) [?] -** Reports include the type of the symbols +** New features + +*** Typed midrule actions + + Because their type is unknown to Bison, the values of midrule actions are + not treated like the others: they don't have %printer and %destructor + support. It also prevents C++ (Bison) variants to handle them properly. + + Typed midrule actions address these issues. Instead of: + + exp: { $<ival>$ = 1; } { $<ival>$ = 2; } { $$ = $<ival>1 + $<ival>2; } + + write: + + exp: <ival>{ $$ = 1; } <ival>{ $$ = 2; } { $$ = $1 + $2; } + +*** Reports include the type of the symbols The sections about terminal and nonterminal symbols of the '*.output' file now specify their declared type. For instance, for: @@ -15,7 +31,7 @@ GNU Bison NEWS NUM <ival> (258) 5 -** Diagnostics about useless rules +*** Diagnostics about useless rules In the following grammar, the 'exp' nonterminal is trivially useless. So, of course, its rules are useless too. @@ -58,6 +74,18 @@ GNU Bison NEWS input: '0' | exp ^^^ +** Bug fixes + +*** GLR: Predicates support broken by #line directives + + Predicates (%?) in GLR such as + + widget: + %? {new_syntax} 'w' id new_args + | %?{!new_syntax} 'w' id old_args + + were issued with #lines in the middle of C code. + * Noteworthy changes in release 3.0.5 (2018-05-27) [stable] ** Bug fixes |