| 1 | (* Copyright (C) 1999-2006, 2008 Henry Cejtin, Matthew Fluet, Suresh |
| 2 | * Jagannathan, and Stephen Weeks. |
| 3 | * Copyright (C) 1997-2000 NEC Research Institute. |
| 4 | * |
| 5 | * MLton is released under a BSD-style license. |
| 6 | * See the file MLton-LICENSE for details. |
| 7 | *) |
| 8 | |
| 9 | structure Bool: BOOL = |
| 10 | struct |
| 11 | datatype bool = datatype bool |
| 12 | |
| 13 | val not = not |
| 14 | |
| 15 | fun scan reader state = |
| 16 | case reader state of |
| 17 | NONE => NONE |
| 18 | | SOME(c, state) => |
| 19 | case c of |
| 20 | #"f" => (case Reader.reader4 reader state of |
| 21 | SOME((#"a", #"l", #"s", #"e"), state) => |
| 22 | SOME(false, state) |
| 23 | | _ => NONE) |
| 24 | | #"t" => (case Reader.reader3 reader state of |
| 25 | SOME((#"r", #"u", #"e"), state) => |
| 26 | SOME(true, state) |
| 27 | | _ => NONE) |
| 28 | | _ => NONE |
| 29 | |
| 30 | val fromString = StringCvt.scanString scan |
| 31 | |
| 32 | val toString = |
| 33 | fn true => "true" |
| 34 | | false => "false" |
| 35 | end |
| 36 | |
| 37 | structure BoolGlobal: BOOL_GLOBAL = Bool |
| 38 | open BoolGlobal |