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vgrindefs(7)
vg...s(7)Standards, Environments, Macros, Character Sets, and miscellanvyg...s(7)
NAME
vgrindefs - vgrind's language definition database
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.
tab() box; lw(0.6i) |lw(0.64i) |lw(4.26i) lw(0.6i) |lw(0.64i)
|lw(4.26i) NameTypeDescription _ abstrT{ Regular expression for the
start of an alternate form comment T} _ aestrT{ Regular expression for
the end of an alternate form comment T} _ bbstrT{ Regular expression
for the start of a block T} _ bestrT{ Regular expression for the end of
a lexical block T} _ cbstrT{ Regular expression for the start of a com‐
ment T} _ cestrT{ Regular expression for the end of a comment T} _ id‐
strT{ String giving characters other than letters and digits that may
legally occur in identifiers (default '_') T} _ kwstrA list of keywords
separated by spaces _ lbstrT{ Regular expression for the start of a
character constant T} _ lestrT{ Regular expression for the end of a
character constant T} _ ocboolT{ Present means uppercase and lowercase
are equivalent T} _ pbstrT{ Regular expression for start of a procedure
T} _ plboolT{ Procedure definitions are constrained to the lexical
level matched by the 'px' capability T} _ pxstrT{ A match for this reg‐
ular expression indicates that procedure definitions may occur at the
next lexical level. Useful for lisp-like languages in which procedure
definitions occur as subexpressions of defuns. T} _ sbstrT{ Regular
expression for the start of a string T} _ sestrT{ Regular expression
for the end of a string T} _ tcstrT{ Use the named entry as a continua‐
tion of this one T} _ tlboolT{ Present means procedures are only de‐
fined at the top lexical level T}
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' ca‐
pability) 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 in‐
put string if the input string is preceded by an escape charac‐
ter (\). 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 uppercase
and lowercase are equivalent, then all the keywords should be specified
in lowercase.
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?\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)
Oracle Solaris 11.4 11 May 2021 vg...s(7)