diff options
Diffstat (limited to 'src/algebra/data.spad.pamphlet')
| -rw-r--r-- | src/algebra/data.spad.pamphlet | 24 |
1 files changed, 4 insertions, 20 deletions
diff --git a/src/algebra/data.spad.pamphlet b/src/algebra/data.spad.pamphlet index 123948b3..d684c59d 100644 --- a/src/algebra/data.spad.pamphlet +++ b/src/algebra/data.spad.pamphlet @@ -25,39 +25,23 @@ import OutputForm ++ Description: ++ Byte is the datatype of 8-bit sized unsigned integer values. Byte(): Public == Private where - Public == Join(OrderedSet, CoercibleTo NonNegativeInteger, - HomotopicTo Character) with + Public == Join(OrderedSet, HomotopicTo Character) with byte: NonNegativeInteger -> % ++ byte(x) injects the unsigned integer value `v' into ++ the Byte algebra. `v' must be non-negative and less than 256. - coerce: NonNegativeInteger -> % - ++ coerce(x) has the same effect as byte(x). bitand: (%,%) -> % ++ bitand(x,y) returns the bitwise `and' of `x' and `y'. bitior: (%,%) -> % ++ bitor(x,y) returns the bitwise `inclusive or' of `x' and `y'. sample: () -> % ++ sample() returns a sample datum of type Byte. - Private == add - byte(x: NonNegativeInteger): % == - not (x < 256$Lisp) => - userError "integer value cannot be represented by a byte" - x : % + Private == SubDomain(NonNegativeInteger, #1 < 256) add + byte(x: NonNegativeInteger): % == x::% sample() = 0$Lisp - hash x == SXHASH(x)$Lisp - - coerce(x: NonNegativeInteger): % == byte x - coerce(x: %): NonNegativeInteger == x : NonNegativeInteger - coerce(c: Character) == ord(c)::% - coerce(x: %): Character == char(x::NonNegativeInteger) - - coerce(x: %): OutputForm == - x::NonNegativeInteger::OutputForm - + coerce(x: %): Character == char rep x x = y == byteEqual(x,y)$Lisp x < y == byteLessThan(x,y)$Lisp - bitand(x,y) == bitand(x,y)$Lisp bitior(x,y) == bitior(x,y)$Lisp @ |