Future/bison
1
0
Fork 0
mirror of https://git.savannah.gnu.org/git/bison.git synced 2026-03-09 04:13:03 +00:00
Code Issues Packages Projects Releases Wiki Activity

doc: reorder C++ sections

Browse Source 
* doc/bison.texi (C++ Parser Interface): Document before semantic_type
and location_type.
This commit is contained in:
Akim Demaille
2018-10-20 13:59:08 +02:00
parent bfbd73f3e0
commit 16d34d8036
1 changed files with 85 additions and 85 deletions
Download Patch File Download Diff File Expand all files Collapse all files

170
doc/bison.texi
View File

@@ -339,9 +339,9 @@ Parsers Written In Other Languages
C++ Parsers
* C++ Bison Interface:: Asking for C++ parser generation
* C++ Parser Interface:: Instantiating and running the parser
* C++ Semantic Values:: %union vs. C++
* C++ Location Values:: The position and location classes
* C++ Parser Interface:: Instantiating and running the parser
* C++ Scanner Interface:: Exchanges between yylex and parse
* A Complete C++ Example:: Demonstrating their use
@@ -10603,9 +10603,9 @@ int yyparse (void);
@menu
* C++ Bison Interface:: Asking for C++ parser generation
* C++ Parser Interface:: Instantiating and running the parser
* C++ Semantic Values:: %union vs. C++
* C++ Location Values:: The position and location classes
* C++ Parser Interface:: Instantiating and running the parser
* C++ Scanner Interface:: Exchanges between yylex and parse
* A Complete C++ Example:: Demonstrating their use
@end menu
@@ -10651,6 +10651,89 @@ newer.
All these files are documented using Doxygen; run @command{doxygen} for a
complete and accurate documentation.
@node C++ Parser Interface
@subsection C++ Parser Interface
@c - define parser_class_name
@c - Ctor
@c - parse, error, set_debug_level, debug_level, set_debug_stream,
@c debug_stream.
@c - Reporting errors
The output files @file{@var{output}.hh} and @file{@var{output}.cc} declare
and define the parser class in the namespace @code{yy}. The class name
defaults to @code{parser}, but may be changed using @samp{%define
parser_class_name @{@var{name}@}}. The interface of this class is detailed
below. It can be extended using the @code{%parse-param} feature: its
semantics is slightly changed since it describes an additional member of the
parser class, and an additional argument for its constructor.
@defcv {Type} {parser} {semantic_type}
@defcvx {Type} {parser} {location_type}
The types for semantic values and locations (if enabled).
@end defcv
@defcv {Type} {parser} {token}
A structure that contains (only) the @code{yytokentype} enumeration, which
defines the tokens. To refer to the token @code{FOO},
use @code{yy::parser::token::FOO}. The scanner can use
@samp{typedef yy::parser::token token;} to ``import'' the token enumeration
(@pxref{Calc++ Scanner}).
@end defcv
@defcv {Type} {parser} {syntax_error}
This class derives from @code{std::runtime_error}. Throw instances of it
from the scanner or from the actions to raise parse errors. This is
equivalent with first invoking @code{error} to report the location and
message of the syntax error, and then to invoke @code{YYERROR} to enter the
error-recovery mode. But contrary to @code{YYERROR} which can only be
invoked from user actions (i.e., written in the action itself), the
exception can be thrown from function invoked from the user action.
@end defcv
@deftypeop {Constructor} {parser} {} parser ()
@deftypeopx {Constructor} {parser} {} parser (@var{type1} @var{arg1}, ...)
Build a new parser object. There are no arguments, unless
@samp{%parse-param @{@var{type1} @var{arg1}@}} was used.
@end deftypeop
@deftypeop {Constructor} {syntax_error} {} syntax_error (const location_type& @var{l}, const std::string& @var{m})
@deftypeopx {Constructor} {syntax_error} {} syntax_error (const std::string& @var{m})
Instantiate a syntax-error exception.
@end deftypeop
@deftypemethod {parser} {int} parse ()
Run the syntactic analysis, and return 0 on success, 1 otherwise.
@cindex exceptions
The whole function is wrapped in a @code{try}/@code{catch} block, so that
when an exception is thrown, the @code{%destructor}s are called to release
the lookahead symbol, and the symbols pushed on the stack.
Exception related code in the generated parser is protected by CPP guards
(@code{#if}) and disabled when exceptions are not supported (i.e., passing
@code{-fno-exceptions} to the C++ compiler).
@end deftypemethod
@deftypemethod {parser} {std::ostream&} debug_stream ()
@deftypemethodx {parser} {void} set_debug_stream (std::ostream& @var{o})
Get or set the stream used for tracing the parsing. It defaults to
@code{std::cerr}.
@end deftypemethod
@deftypemethod {parser} {debug_level_type} debug_level ()
@deftypemethodx {parser} {void} set_debug_level (debug_level @var{l})
Get or set the tracing level. Currently its value is either 0, no trace,
or nonzero, full tracing.
@end deftypemethod
@deftypemethod {parser} {void} error (const location_type& @var{l}, const std::string& @var{m})
@deftypemethodx {parser} {void} error (const std::string& @var{m})
The definition for this member function must be supplied by the user: the
parser uses it to report a parser error occurring at @var{l}, described by
@var{m}. If location tracking is not enabled, the second signature is used.
@end deftypemethod
@node C++ Semantic Values
@subsection C++ Semantic Values
@c - No objects in unions
@@ -11021,89 +11104,6 @@ files, reused by other parsers as follows:
@end example
@node C++ Parser Interface
@subsection C++ Parser Interface
@c - define parser_class_name
@c - Ctor
@c - parse, error, set_debug_level, debug_level, set_debug_stream,
@c debug_stream.
@c - Reporting errors
The output files @file{@var{output}.hh} and @file{@var{output}.cc} declare
and define the parser class in the namespace @code{yy}. The class name
defaults to @code{parser}, but may be changed using @samp{%define
parser_class_name @{@var{name}@}}. The interface of this class is detailed
below. It can be extended using the @code{%parse-param} feature: its
semantics is slightly changed since it describes an additional member of the
parser class, and an additional argument for its constructor.
@defcv {Type} {parser} {semantic_type}
@defcvx {Type} {parser} {location_type}
The types for semantic values and locations (if enabled).
@end defcv
@defcv {Type} {parser} {token}
A structure that contains (only) the @code{yytokentype} enumeration, which
defines the tokens. To refer to the token @code{FOO},
use @code{yy::parser::token::FOO}. The scanner can use
@samp{typedef yy::parser::token token;} to ``import'' the token enumeration
(@pxref{Calc++ Scanner}).
@end defcv
@defcv {Type} {parser} {syntax_error}
This class derives from @code{std::runtime_error}. Throw instances of it
from the scanner or from the actions to raise parse errors. This is
equivalent with first invoking @code{error} to report the location and
message of the syntax error, and then to invoke @code{YYERROR} to enter the
error-recovery mode. But contrary to @code{YYERROR} which can only be
invoked from user actions (i.e., written in the action itself), the
exception can be thrown from function invoked from the user action.
@end defcv
@deftypeop {Constructor} {parser} {} parser ()
@deftypeopx {Constructor} {parser} {} parser (@var{type1} @var{arg1}, ...)
Build a new parser object. There are no arguments, unless
@samp{%parse-param @{@var{type1} @var{arg1}@}} was used.
@end deftypeop
@deftypeop {Constructor} {syntax_error} {} syntax_error (const location_type& @var{l}, const std::string& @var{m})
@deftypeopx {Constructor} {syntax_error} {} syntax_error (const std::string& @var{m})
Instantiate a syntax-error exception.
@end deftypeop
@deftypemethod {parser} {int} parse ()
Run the syntactic analysis, and return 0 on success, 1 otherwise.
@cindex exceptions
The whole function is wrapped in a @code{try}/@code{catch} block, so that
when an exception is thrown, the @code{%destructor}s are called to release
the lookahead symbol, and the symbols pushed on the stack.
Exception related code in the generated parser is protected by CPP guards
(@code{#if}) and disabled when exceptions are not supported (i.e., passing
@code{-fno-exceptions} to the C++ compiler).
@end deftypemethod
@deftypemethod {parser} {std::ostream&} debug_stream ()
@deftypemethodx {parser} {void} set_debug_stream (std::ostream& @var{o})
Get or set the stream used for tracing the parsing. It defaults to
@code{std::cerr}.
@end deftypemethod
@deftypemethod {parser} {debug_level_type} debug_level ()
@deftypemethodx {parser} {void} set_debug_level (debug_level @var{l})
Get or set the tracing level. Currently its value is either 0, no trace,
or nonzero, full tracing.
@end deftypemethod
@deftypemethod {parser} {void} error (const location_type& @var{l}, const std::string& @var{m})
@deftypemethodx {parser} {void} error (const std::string& @var{m})
The definition for this member function must be supplied by the user: the
parser uses it to report a parser error occurring at @var{l}, described by
@var{m}. If location tracking is not enabled, the second signature is used.
@end deftypemethod
@node C++ Scanner Interface
@subsection C++ Scanner Interface
@c - prefix for yylex.