File: many.doc

package info (click to toggle)
hol-light 20230128-1
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 45,636 kB
  • sloc: ml: 688,681; cpp: 439; makefile: 302; lisp: 286; java: 279; sh: 251; yacc: 108; perl: 78; ansic: 57; sed: 39; python: 13
file content (30 lines) | stat: -rw-r--r-- 1,066 bytes parent folder | download | duplicates (5)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
\DOC many

\TYPE {many : ('a -> 'b * 'a) -> 'a -> 'b list * 'a}

\SYNOPSIS
Parses zero or more successive items using given parser.

\DESCRIBE
If {p} is a parser then {many p} gives a new parser that parses a series of
successive items using {p} and returns the result as a list, with the expected
left-to-right order.

\FAILURE
The immediate call {many} never fails. The resulting parser may fail when
applied, though any {Noparse} exception in the core parser will be trapped.

\COMMENTS
This is one of a suite of combinators for manipulating ``parsers''. A parser is
simply a function whose OCaml type is some instance of
{:('a)list -> 'b * ('a)list}. The function should take a list of objects of
type {:'a} (e.g. characters or tokens), parse as much of it as possible from
left to right, and return a pair consisting of the object derived from parsing
(e.g. a term or a special syntax tree) and the list of elements that were not
processed.

\SEEALSO
++, |||, >>, a, atleast, elistof, finished, fix, leftbin, listof, nothing,
possibly, rightbin, some.

\ENDDOC