Future/bison
1
0
Fork 0
mirror of https://git.savannah.gnu.org/git/bison.git synced 2026-03-17 16:23:04 +00:00
Code Issues Packages Projects Releases Wiki Activity

Don't document %no-default-prec for now.

Browse Source
This commit is contained in:
Paul Eggert
2003-10-05 07:34:36 +00:00
parent 0cc3da3a4e
commit 91d2c560a8
3 changed files with 21 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
ChangeLog
View File

@@ -1,3 +1,10 @@
2003-10-05 Paul Eggert <eggert@twinsun.com>
* NEWS: Don't document %no-default-prec, as it's still
too experimental.
* doc/bison.texinfo: Document %no-default-prec only if
the defaultprec flag is set. Normally it's not.
2003-10-04 Paul Eggert <eggert@twinsun.com> 2003-10-04 Paul Eggert <eggert@twinsun.com>
* data/glr.c (b4_rhs_value, b4_rhs_location): Yield a * data/glr.c (b4_rhs_value, b4_rhs_location): Yield a

3
NEWS
View File

@@ -3,9 +3,6 @@ Bison News
Changes in version 1.875c: Changes in version 1.875c:
* New %no-default-prec declaration, to disable default rule precedences.
New %default-prec declaration, to reestablish the default.
Changes in version 1.875b, 2003-06-17: Changes in version 1.875b, 2003-06-17:
* GLR grammars now support locations. * GLR grammars now support locations.

14
doc/bison.texinfo
View File

@@ -16,6 +16,10 @@
@c @clear shorttitlepage-enabled @c @clear shorttitlepage-enabled
@c @set shorttitlepage-enabled @c @set shorttitlepage-enabled
@c Set following if you want to document %default-prec and %no-default-prec.
@c This feature is experimental and may change in future Bison versions.
@c @set defaultprec
@c ISPELL CHECK: done, 14 Jan 1993 --bob @c ISPELL CHECK: done, 14 Jan 1993 --bob
@c Check COPYRIGHT dates. should be updated in the titlepage, ifinfo @c Check COPYRIGHT dates. should be updated in the titlepage, ifinfo
@@ -3684,10 +3688,12 @@ Declare a terminal symbol (token type name) that is nonassociative
Using it in a way that would be associative is a syntax error. Using it in a way that would be associative is a syntax error.
@end deffn @end deffn
@ifset defaultprec
@deffn {Directive} %default-prec @deffn {Directive} %default-prec
Assign a precedence to rules lacking an explicit @code{%prec} modifier Assign a precedence to rules lacking an explicit @code{%prec} modifier
(@pxref{Contextual Precedence, ,Context-Dependent Precedence}). (@pxref{Contextual Precedence, ,Context-Dependent Precedence}).
@end deffn @end deffn
@end ifset
@deffn {Directive} %type @deffn {Directive} %type
Declare the type of semantic values for a nonterminal symbol Declare the type of semantic values for a nonterminal symbol
@@ -3759,11 +3765,13 @@ and so on. @xref{Multiple Parsers, ,Multiple Parsers in the Same
Program}. Program}.
@end deffn @end deffn
@ifset defaultprec
@deffn {Directive} %no-default-prec @deffn {Directive} %no-default-prec
Do not assign a precedence to rules lacking an explicit @code{%prec} Do not assign a precedence to rules lacking an explicit @code{%prec}
modifier (@pxref{Contextual Precedence, ,Context-Dependent modifier (@pxref{Contextual Precedence, ,Context-Dependent
Precedence}). Precedence}).
@end deffn @end deffn
@end ifset
@deffn {Directive} %no-parser @deffn {Directive} %no-parser
Do not include any C code in the parser file; generate tables only. The Do not include any C code in the parser file; generate tables only. The
@@ -4863,6 +4871,7 @@ exp: @dots{}
@end group @end group
@end example @end example
@ifset defaultprec
If you forget to append @code{%prec UMINUS} to the rule for unary If you forget to append @code{%prec UMINUS} to the rule for unary
minus, Bison silently assumes that minus has its usual precedence. minus, Bison silently assumes that minus has its usual precedence.
This kind of problem can be tricky to debug, since one typically This kind of problem can be tricky to debug, since one typically
@@ -4882,6 +4891,7 @@ grammar, but it helps to protect against incorrect rule precedences.
The effect of @code{%no-default-prec;} can be reversed by giving The effect of @code{%no-default-prec;} can be reversed by giving
@code{%default-prec;}, which is the default. @code{%default-prec;}, which is the default.
@end ifset
@node Parser States @node Parser States
@section Parser States @section Parser States
@@ -6814,11 +6824,13 @@ parsing. @xref{Parser Function, ,The Parser Function @code{yyparse}}.
Equip the parser for debugging. @xref{Decl Summary}. Equip the parser for debugging. @xref{Decl Summary}.
@end deffn @end deffn
@ifset defaultprec
@deffn {Directive} %default-prec @deffn {Directive} %default-prec
Assign a precedence to rules that lack an explicit @samp{%prec} Assign a precedence to rules that lack an explicit @samp{%prec}
modifier. @xref{Contextual Precedence, ,Context-Dependent modifier. @xref{Contextual Precedence, ,Context-Dependent
Precedence}. Precedence}.
@end deffn @end deffn
@end ifset
@deffn {Directive} %defines @deffn {Directive} %defines
Bison declaration to create a header file meant for the scanner. Bison declaration to create a header file meant for the scanner.
@@ -6873,11 +6885,13 @@ function is applied to the two semantic values to get a single result.
Bison declaration to rename the external symbols. @xref{Decl Summary}. Bison declaration to rename the external symbols. @xref{Decl Summary}.
@end deffn @end deffn
@ifset defaultprec
@deffn {Directive} %no-default-prec @deffn {Directive} %no-default-prec
Do not assign a precedence to rules that lack an explicit @samp{%prec} Do not assign a precedence to rules that lack an explicit @samp{%prec}
modifier. @xref{Contextual Precedence, ,Context-Dependent modifier. @xref{Contextual Precedence, ,Context-Dependent
Precedence}. Precedence}.
@end deffn @end deffn
@end ifset
@deffn {Directive} %no-lines @deffn {Directive} %no-lines
Bison declaration to avoid generating @code{#line} directives in the Bison declaration to avoid generating @code{#line} directives in the