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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 capabil-
ities which indicate that the language has some particular
feature and string capabilities which give a regular expres-
sion 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.
SunOS 5.10 Last change: 10 Aug 1994 1
Standards, Environments, and Macros vgrindefs(5)
_______________________________________________________________
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
definitions 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
SunOS 5.10 Last change: 10 Aug 1994 2
Standards, Environments, and Macros vgrindefs(5)
_______________________________________________________________
| 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 pro-
cedure name.
() Grouping
| Alternation
? Last item is optional
SunOS 5.10 Last change: 10 Aug 1994 3
Standards, Environments, and Macros vgrindefs(5)
\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 delim-
iter 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, indi-
cating 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 typ-
ical of a language entry.
C|c|the C programming language:\
:pb=^\d?*?\d?\p\d?(\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 Last change: 10 Aug 1994 4
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