diff options
Diffstat (limited to 'src/algebra/data.spad.pamphlet')
| -rw-r--r-- | src/algebra/data.spad.pamphlet | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/src/algebra/data.spad.pamphlet b/src/algebra/data.spad.pamphlet index 5a04c4cb..6810cbb1 100644 --- a/src/algebra/data.spad.pamphlet +++ b/src/algebra/data.spad.pamphlet @@ -25,7 +25,7 @@ import OutputForm ++ Description: ++ Byte is the datatype of 8-bit sized unsigned integer values. Byte(): Public == Private where - Public == Join(OrderedFinite, HomotopicTo Character,Logic) with + Public == Join(OrderedFinite,Logic) with byte: NonNegativeInteger -> % ++ byte(x) injects the unsigned integer value `v' into ++ the Byte algebra. `v' must be non-negative and less than 256. @@ -36,6 +36,7 @@ Byte(): Public == Private where sample: % ++ \spad{sample} gives a sample datum of type Byte. Private == SubDomain(NonNegativeInteger, #1 < 256) add + import %icst0: % from Foreign Builtin import %beq: (%,%) -> Boolean from Foreign Builtin import %blt: (%,%) -> Boolean from Foreign Builtin import %bgt: (%,%) -> Boolean from Foreign Builtin @@ -46,15 +47,13 @@ Byte(): Public == Private where import %bcompl: % -> % from Foreign Builtin byte(x: NonNegativeInteger): % == per x - sample = 0$Foreign(Builtin) - coerce(c: Character) == per ord c - coerce(x: %): Character == char rep x + sample = %icst0 x = y == %beq(x,y) x < y == %blt(x,y) x > y == %bgt(x,y) x <= y == %ble(x,y) x >= y == %bge(x,y) - min() == per 0 + min() == %icst0 max() == per 255 size() == 256 index n == byte((n - 1) pretend NonNegativeInteger) |