.\" Copyright (c) 1983 Regents of the University of California.
.\" All rights reserved. The Berkeley software License Agreement
.\" specifies the terms and conditions for redistribution.
.\" @(#)vgrindefs.5 6.1 (Berkeley) %G%
vgrindefs \- vgrind's language definition data base
contains all language definitions for vgrind. The data base is
The following table names and describes each field.
.ta \w'k0-k9 'u +\w'Type 'u
\fBName Type Description\fR
pb str regular expression for start of a procedure
bb str regular expression for start of a lexical block
be str regular expression for the end of a lexical block
cb str regular expression for the start of a comment
ce str regular expression for the end of a comment
sb str regular expression for the start of a string
se str regular expression for the end of a string
lb str regular expression for the start of a character constant
le str regular expression for the end of a character constant
tl bool present means procedures are only defined at the top
oc bool present means upper and lower case are equivalent
kw str a list of keywords separated by spaces
The following entry, which describes the C language, is
typical of a language entry.
:pb=^\ed?*?\ed?\ep\ed?\(\ea?\):bb={:be=}:cb=/*:ce=*/:sb=":se=\ee":\e
:kw=asm auto break case char continue default do double else enum\e
extern float for fortran goto if int long register return short\e
sizeof static struct switch typedef union unsigned while #define\e
#else #endif #if #ifdef #ifndef #include #undef # define else endif\e
if ifdef ifndef include undef:
Note that the first field is just the language name (and any variants
of it). Thus the C language could be specified to
Entries may continue onto multiple lines by giving a \e as the last
Boolean capabilities which indicate that the language has
capabilities which give a regular expression or
uses regular expression which are very similar to those of
The characters `^', `$', `:' and `\e'
are reserved characters and must be
"quoted" with a preceding \e if they
are to be included as normal characters.
The metasymbols and their meanings are:
a delimiter (space, tab, newline, start of line)
matches any string of symbols (like .* in lex)
matches any alphanumeric name. In a procedure definition (pb) the string
that matches this symbol is used as the procedure name.
preceding any string means that the string will not match an
input string if the input string is preceded by an escape character (\e).
This is typically used for languages (like C) which can include the
string delimiter in a string b 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".
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
/usr/lib/vgrindefs file containing terminal descriptions