/usr/share/hol88-2.02.19940316/Library/parser/general.ml is in hol88-library-source 2.02.19940316-19.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 | letref FIRST_CHARS = []:string list
and CHARS = []:string list
and DEBUG = false
and IGNORE = []:(string#string)list
and USEFUL = []:(string#string)list;;
let push item lst = (item . lst);;
let pop lst =
if null lst then failwith `can't pop null list`
else (hd lst,tl lst);;
let write_string str file =
if file = `nil` then tty_write str else write(file,str);;
let read_char file =
if file = `nil` then tty_read() else (read file);;
let close_file file =
if file = `nil` then ()
else close file;;
let open_file direction filename =
if filename = `nil` then `nil`
else if mem direction [`in` ; `input` ; `i`] then
openi filename
else if mem direction [`out`; `output`; `o`] then
openw filename
else
failwith (concat `can't open `
(concat filename
(concat ` in direction ` direction)));;
letrec e_w_s file chr whitespace =
if mem chr whitespace then e_w_s file (read_char file) whitespace
else if chr = `nil` then failwith `unexpected eof`
else chr;;
letrec e_w_s_ok file chr whitespace =
if mem chr whitespace then e_w_s_ok file (read_char file) whitespace
else if chr = `nil` then `nil`
else chr;;
let determine_lst ch follow white =
if follow = white then
mem ch white
else
not (mem ch follow);;
letrec get_word2 ch lst file white seps ignore useful =
if ch = `nil` then
(lst,`nil`)
else if can (assoc ch) seps then
(lst,ch)
else if can (assoc ch) ignore then
(lst,ch)
else if can (assoc ch) useful then
(lst,ch)
else if mem ch white then
(lst,e_w_s_ok file (read_char file) white)
else
get_word2 (read_char file) (append lst [ch]) file
white seps ignore useful;;
letrec get_word1 ch lst file follow white =
if ch = `nil` then
(lst,`nil`)
else if not (mem ch follow) then
(lst,e_w_s_ok file ch white)
else
get_word1 (read_char file) (append lst [ch]) file follow white;;
let complete_separator thing file white seps ignore useful =
if can (assoc thing) seps then
let follow = snd (assoc thing seps) in
if null follow then
(thing,e_w_s_ok file (read_char file) white)
else
let (wrd,sep) = get_word1 (read_char file) [thing] file
follow white in
(implode wrd,sep)
else
let (wrd,sep) = get_word2 (read_char file) [thing] file
white seps ignore useful in
(implode wrd,sep);;
let get_word file white last seps sep ignore useful =
if mem last white then
failwith `Generated Parser Error, please report it.`
else if not (mem sep white) then
(last,sep)
else if last = `nil` then
(`nil`,`nil`)
else if can (assoc last) useful then
(last,read_char file)
else if can (assoc last) ignore then
(last,read_char file)
else
complete_separator last file white seps ignore useful;;
letrec useful_stuff ch finish file ch_lst =
if ch = finish then
(implode ch_lst,finish)
if ch = `nil` then
failwith `Unexpected EOF`
else
useful_stuff (read_char file) finish file (append ch_lst [ch]);;
letrec ignore_stuff ch finish file white =
if ch = finish then
e_w_s_ok file (read_char file) white
else if ch = `nil` then
failwith `unexpected EOF`
else ignore_stuff (read_char file) finish file white;;
letrec read_input file lst white seps prev ignore useful =
let (WORD,sep) = get_word file white prev seps (hd white) ignore useful in
if can (assoc WORD) ignore then
read_input file lst white seps
(ignore_stuff sep (snd (assoc WORD ignore))
file white) ignore useful
else
let lst = append lst [WORD] in
if WORD = `nil` then
(close_file file; lst)
else if can (assoc WORD) useful then
let block,final = useful_stuff sep (snd (assoc WORD useful))
file [] in
read_input file (append lst [block;final]) white seps
(e_w_s_ok file (read_char file) white)
ignore useful
else
read_input file lst white seps sep ignore useful;;
let gnt lst white WORD =
if WORD = `nil` then
if null lst then
(`nil`,[])
else failwith `Unexpected end of term.`
else if WORD = white then
(hd lst,tl lst)
else
(WORD,lst);;
let eat_terminal token WORD lst prdn =
if WORD = token then
if WORD = `nil` then
if null lst then
(`nil`,[])
else failwith `Unexpected end of term.`
else
(hd lst,tl lst)
else
fail;;
letrec chop_off ctr pop_list result_list =
if ctr = 0 then (result_list,pop_list)
else chop_off (ctr-1) ((hd result_list) . pop_list) (tl result_list);;
let debug_return state prdn =
if DEBUG then
write_string (state ^ ` prdn "` ^ prdn ^`".\L`) `nil`
else
();;
let do_return_1 res_list white prdn thing lst expect =
if thing = white then
(debug_return `EXITING` prdn;
(hd res_list, tl res_list, (hd lst), (tl lst)))
else if thing = expect then
(debug_return `EXITING` prdn;
(hd res_list, tl res_list, thing, lst))
else
(debug_return `FAILING` prdn;
fail);;
let do_return res_list white prdn prev lst expect =
if expect = `nil` then
(debug_return `EXITING` prdn;
(hd res_list, tl res_list, prev, lst))
else
do_return_1 res_list white prdn prev lst expect;;
let debug_enter(prdn,expect,wrd) =
if DEBUG then
write_string (`ENTERING prdn "`^prdn^
`": Curr. Token = "`^wrd^
`"; Expected = "`^expect^`".\L`) `nil`
else ();;
let debug_on() = let D = DEBUG in DEBUG := true;D
and debug_off() = let D = DEBUG in DEBUG := false;D;;
|