vgrindefs(5)						Standards, Environments, and Macros					      vgrindefs(5)

NAME

       vgrindefs - vgrind's language definition data base

SYNOPSIS

       /usr/lib/vgrindefs

DESCRIPTION

       vgrindefs contains all language definitions for vgrind(1).  Capabilities in vgrindefs are of two types: Boolean capabilities which indicate
       that the language has some particular feature and string capabilities which give a regular expression or keyword list. Entries may continue
       onto multiple lines by giving a  as the last character of a line. Lines starting with # are comments.

   Capabilities
       The following table names and describes each capability.

       +-------+---------+--------------------------------------------+
       |Name   | Type	 |Description				      |
       +-------+---------+--------------------------------------------+
       |ab     | str	 |Regular  expression  for  the  start	of an |
       |       |	 |alternate form comment		      |
       +-------+---------+--------------------------------------------+
       |ae     | str	 |Regular expression for the end of an alter- |
       |       |	 |nate form comment			      |
       +-------+---------+--------------------------------------------+
       |bb     | str	 |Regular expression for the start of a block |
       +-------+---------+--------------------------------------------+
       |be     | str	 |Regular expression for the end of a lexical |
       |       |	 |block 				      |
       +-------+---------+--------------------------------------------+
       |cb     | str	 |Regular expression for the start of a  com- |
       |       |	 |ment					      |
       +-------+---------+--------------------------------------------+
       |ce     | str	 |Regular expression for the end of a comment |
       +-------+---------+--------------------------------------------+
       |id     | str	 |String giving characters other than letters |
       |       |	 |and digits that may legally occur in	iden- |
       |       |	 |tifiers (default `_') 		      |
       +-------+---------+--------------------------------------------+
       |kw     | str	 |A list of keywords separated by spaces      |
       +-------+---------+--------------------------------------------+
       |lb     | str	 |Regular expression for the start of a char- |
       |       |	 |acter constant			      |
       +-------+---------+--------------------------------------------+
       |le     | str	 |Regular expression for the end of a charac- |
       |       |	 |ter constant				      |
       +-------+---------+--------------------------------------------+
       |oc     | bool	 |Present  means  upper  and  lower  case are |
       |       |	 |equivalent				      |
       +-------+---------+--------------------------------------------+
       |pb     | str	 |Regular expression for start of a procedure |
       +-------+---------+--------------------------------------------+
       |pl     | bool	 |Procedure definitions  are  constrained  to |
       |       |	 |the lexical level matched by the `px' capa- |
       |       |	 |bility				      |
       +-------+---------+--------------------------------------------+
       |px     | str	 |A match for this regular  expression	indi- |
       |       |	 |cates  that procedure definitions may occur |
       |       |	 |at the next lexical level. Useful for lisp- |
       |       |	 |like	languages  in which procedure defini- |
       |       |	 |tions occur as subexpressions of defuns.    |
       +-------+---------+--------------------------------------------+
       |sb     | str	 |Regular  expression  for  the  start	of  a |
       |       |	 |string				      |
       +-------+---------+--------------------------------------------+
       |se     | str	 |Regular expression for the end of a string  |
       +-------+---------+--------------------------------------------+
       |tc     | str	 |Use  the  named  entry as a continuation of |
       |       |	 |this one				      |
       +-------+---------+--------------------------------------------+
       |tl     | bool	 |Present means procedures are	only  defined |
       |       |	 |at the top lexical level		      |
       +-------+---------+--------------------------------------------+

   Regular Expressions
       vgrindefs  uses regular expressions similar to those of ex(1) and lex(1). The characters `^', `$', `:', and `' are reserved characters and
       must be `quoted' with a preceding  if they are to be included as normal characters. The metasymbols and their meanings are:

       $	       The end of a line

       ^	       The beginning of a line

       d	       A delimiter (space, tab, newline, start of line)

       a	       Matches any string of symbols (like `.*' in lex)

       p	       Matches any identifier. In a procedure definition (the `pb' capability) the string that matches this symbol is used as  the
		       procedure name.

       ()	       Grouping

       |	       Alternation

       ?	       Last item is optional

       e	       Preceding  any  string  means  that  the string will not match an input string if the input string is preceded by an escape
		       character ().  This is typically used for languages (like C) that can include the string delimiter in a string by escaping
		       it.

       Unlike  other  regular  expressions in the system, these match words and not characters. Hence something like `(tramp|steamer)flies?' would
       match `tramp', `steamer', `trampflies', or `steamerflies'.  Contrary to some forms of regular expressions, vgrindef alternation binds  very
       tightly. Grouping parentheses are likely to be necessary in expressions involving alternation.

   Keyword List
       The  keyword  list  is just a list of keywords in the language separated by spaces. If the `oc' boolean is specified, indicating that upper
       and lower case are equivalent, then all the keywords should be specified in lower case.

EXAMPLES

       Example 1: A sample program.

       The following entry, which describes the C language, is typical of a language entry.

	      C|c|the C programming language:
		  :pb=^d?*?d?pd?(a?)(d|{):bb={:be=}:cb=/*:ce=*/:sb=":se=e":
		  :le=e':tl:
		  :kw=asm auto break case char continue default do double else enum
		  extern float for fortran goto if int long register return short
		  sizeof static struct switch typedef union unsigned void while #define
		  #else #endif #if #ifdef #ifndef #include #undef # define endif
		  ifdef ifndef include undef defined:

       Note that the first field is just the language name (and any variants of it). Thus the C language could be specified to vgrind(1) as `c' or
       `C'.

FILES

       /usr/lib/vgrindefs      file containing vgrind descriptions

SEE ALSO

       ex(1), lex(1), troff(1), vgrind(1)

SunOS 5.10							    10 Aug 1994 						      vgrindefs(5)