Manual page for vgrindefs(5)
vgrindefs - vgrind's language definition data base
contains all language definitions for
are of two types:
Boolean capabilities which indicate that the language has
some particular feature
capabilities which give a regular expression or
Entries may continue onto multiple lines by giving a \ as the last
character of a line.
Lines starting with # are comments.
The following table names and describes each capability.
- ab str
Regular expression for the start of an alternate form comment
- ae str
Regular expression for the end of an alternate 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 comment
- 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 identifiers (default `_')
- kw str
A list of keywords separated by spaces
- lb str
Regular expression for the start of a character constant
- le str
Regular expression for the end of a character 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' capability
- px str
A match for this regular 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.
- 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
uses regular expressions similar to those of
The characters `^',
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
A delimiter (space, tab, newline, start of line)
Matches any string of symbols
(like `.*' in lex)
Matches any identifier.
In a procedure definition
(the `pb' capability)
the string that matches this symbol is used as the procedure name.
Last item is optional
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',
Contrary to some forms of regular expressions,
alternation binds very tightly.
Grouping parentheses are likely to be necessary in expressions
The keyword list is just a list of keywords in the language separated
If the `oc' boolean is specified,
indicating that upper and lower case are equivalent,
then all the keywords should be specified in lower case.
The following entry,
which describes the C language,
is typical of a language entry.
C|c|the C programming language:\
: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
as `c' or `C'.
file containing vgrind descriptions
Created by unroff & hp-tools.
© by Hans-Peter Bischof. All Rights Reserved (1997).
Last modified 21/April/97