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    Command:

    sid

    
    
    

    SYNTAX

           sid [option]... file...
    
    
    

    DESCRIPTION

           The  sid command is used to turn descriptions of a language into a pro-
           gram for recognising that language.  This manual page details the  com-
           mand line syntax; for more information, consult the sid user documenta-
           tion.  The number of files specified on the command line varies depend-
           ing upon the output language.  The description of the --language option
           specifies the number of files for each language.
    
    
    

    SWITCHES

           The new version of sid accepts both short form and  long  form  command
           line switches.
    
           Short  form switches are single characters, and begin with a '-' or '+'
           character.  They can be concatentated into a single command line  word,
           e.g.:
    
                  -vdl dump-file language-name
    
           which  contains three different switches (-v, which takes no arguments;
           -d, which takes one argument: dump-file; and -l, which takes one  argu-
           ment: language-name).
    
           Long form switches are strings, and begin with '--' or '++'.  With long
           form switches, only the shortest unique prefix need  be  entered.   The
           long form of the above example would be:
    
                  --version --dump-file dump-file --language language-name
    
           In most cases the arguments to the switch should follow the switch as a
           separate word.  In the case of short form switches,  the  arguments  to
           the  short form switches in a single word should follow the word in the
           order of the switches (as in the first example).  For some options, the
           argument  may  be part of the same word as the switch (such options are
           shown without a space between the switch and the argument in the switch
           summaries  below).   In  the case of short form switches, such a switch
           would terminate any concatentation  of  switches  (either  a  character
           would follow it, which would be treated as its argument, or it would be
           the end of the word, and its argument would follow as normal).
    
           For binary switches, the '-' or '--' switch prefixes set  (enable)  the
           switch, and the '+' or '++' switch prefixes reset (disable) the switch.
           This is probably back to front, but is in keeping with other  programs.
           The switches '--' or '++' by themselves terminate option parsing.
    
    
    

    ERROR FILE SYNTAX

           It is possible to change the error messages that sid uses.  In order to
           do this, make the environment variable SID_ERROR_FILE contain the  name
           of a file with the new error messages in.
    
           The --show-errors option may be used to get a copy of the current error
           messages.
    
    
    

    OPTIONS

           sid accepts the following command line options:
    
           --dump-file FILE
           -d FILE
    
                  This option causes intermediate dumps of the grammar to be writ-
                  ten to the file FILE.
    
           --factor-limit LIMIT
           -f LIMIT
    
                  This  option limits the number of rules that can be created dur-
                  ing the factorisation process.   It  is  probably  best  not  to
                  change this.
    
           --help
           -?
    
                  Write an option summary to the standard error.
    
           --inline INLINES
           -i INLINES
    
                  This  option  controls  what inlining will be done in the output
                  parser.  The inlines argument should be a comma  seperated  list
                  of the following words:
    
                     SINGLES
                            This  causes  single  alternative rules to be inlined.
                            This inlining is no longer performed as a modification
                            to the grammar (it was in version 1.0).
    
                     BASICS This  causes  rules  that  contain only basics (and no
                            exception  handlers  or  empty  alternatives)  to   be
                            inlined.   The  restriction  on exception handlers and
                            empty alternatives is rather  arbitrary,  and  may  be
                            changed later.
    
                     TAIL   This causes tail recursive calls to be inlined.  With-
                            out this, tail recursion elimination will not be  per-
                            formed.
    
                     OTHER  This  causes other calls to be inlined wherever possi-
                            ble.  Unless the "MULTI" inlining is  also  specified,
                            this will be done only for productions that are called
                            once.
    
                     MULTI  This causes calls to be  inlined,  even  if  the  rule
    
                         -inline noall,singles
    
                  would turn on single alternative rule inlining only, whilst:
    
                         -inline singles,noall
    
                  would  turn  off  all  inlining.   The default is as if SID were
                  invoked with the option:
    
                         -inline noall,basics,tail
    
           --language LANGUAGE
           -l LANGUAGE
    
                  This option  specifies  the  output  language.   Currently  this
                  should  be  either  "ansi-c", "pre-ansi-c", "ossg-c", or "test".
                  The default is "ansi-c".
    
                  The "ansi-c" and "pre-ansi-c" languages are basically the  same.
                  The  only  difference  is  that "ansi-c" initially uses function
                  prototypes, and "pre-ansi-c"  doesn't.   The  "ossg-c"  language
                  uses macros to declare and define functions which may be defined
                  to give either  prototypes  or  non-prototypes.   Each  language
                  takes  two  input files, a grammar file and an actions file, and
                  produces two output files, a C source file containing the gener-
                  ated parser and a C header file containing the external declara-
                  tions for the parser.  The C language specific options are:
                  prototypes  proto   ossg-prototypes   ossg-proto   no-prototypes
                  no-proto
                         These enable or disable the use of function prototypes or
                         the OSSG prototype macros.
                  split split=NUMBER no-split
                         These enable or disable the  output  file  split  option.
                         The generated files can be very large even without inlin-
                         ing.  This option splits the main output file into a num-
                         ber of components containing about NUMBER lines each (the
                         default being 50000).  These components are distinguished
                         by successively substituting 1, 2, 3, ... for the charac-
                         ter '@' in the output file name.
                  numeric-ids numeric no-numeric-ids no-numeric
                         These enable or disable the use of  numeric  identifiers.
                         Numeric  identifiers  replace  the identifier name with a
                         number, which is mainly of  use  in  stopping  identifier
                         names  getting  too  long.   The disadvantage is that the
                         code becomes less readable, and more difficult to  debug.
                         Numeric identifiers are not used by default and are never
                         used for terminal numbers.
                  casts cast no-casts no-cast
                         These enable or disable casting of action and  assignment
                         operator  immutable  parameters.  If enabled, a parameter
                         is cast to its own type when it is substituted  into  the
    
                  lines line no-lines no-line
                         These determine whether "#line" directives should be out-
                         put to relate the output file to the actions file.  These
                         are generated by default.
    
                  The "test" language only takes one input file, and  produces  no
                  output  file.   It may be used to check that a grammar is valid.
                  In conjunction with the dump file, it may be used to  check  the
                  transformations that would be applied to the grammar.  There are
                  no language specific options for the "test" language.
    
           --show-errors
           -e
    
                  Write the current error message list to the standard output.
    
           --switch OPTION
           -s OPTION
    
                  Pass through OPTION as a language specific option.
    
           --tab-width NUMBER
           -t NUMBER
    
                  This option specifies the number of spaces that a tab  occupies.
                  It defaults to 8.  It is only used when indenting output.
    
           --version
           -v
    
                  This option causes the version number and supported languages to
                  be written to the standard error stream.
    
    
    

    SEE ALSO

           SID users' guide.
    
                                                                            sid(1)
    
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