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StdEnv-doc
Commits
33ff5070
Verified
Commit
33ff5070
authored
Aug 16, 2018
by
John van Groningen
Committed by
Camil Staps
Jun 27, 2019
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Plain Diff
import module StdFunctions in module StdFunc
parent
be55ff24
Changes
3
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3 changed files
with
78 additions
and
119 deletions
+78
-119
StdFunc.dcl
StdFunc.dcl
+3
-79
StdFunc.icl
StdFunc.icl
+3
-32
StdFunctions.dcl
StdFunctions.dcl
+72
-8
No files found.
StdFunc.dcl
View file @
33ff5070
...
...
@@ -5,87 +5,11 @@ definition module StdFunc
*/
// ****************************************************************************************
// Concurrent Clean Standard Library Module Version
2
.0
// Copyright
1998 University of Nijmegen
// Concurrent Clean Standard Library Module Version
3
.0
// Copyright
2018 Radboud University
// ****************************************************************************************
/**
* The identity function.
*
* @param A value
* @result The same value
*/
id
::
!.
a
->
.
a
/**
* The constant function.
*
* @param A value
* @param Another value
* @result The first value
*/
const
::
!.
a
.
b
->
.
a
/**
* Flip the arguments of a function. This is useful in function compositions.
*
* @type !.(.a -> .(.b -> .c)) .b .a -> .c
* @param A function
* @param The second argument to the function
* @param The first argument to the function
* @result The function, applied to its arguments
*/
flip
f
a
b
:==
f
b
a
/**
* Function composition.
*
* @type u:(.a -> .b) u:(.c -> .a) -> u:(.c -> .b)
* @param A function f
* @param A function g
* @result The function f o g, that is, f applied after g
*/
(
o
)
infixr
9
(
o
)
f
g
:==
\
x
->
f
(
g
x
)
/**
* Apply a function twice.
*
* @param A function f
* @param A value x
* @result f (f x)
*/
twice
::
!(.
a
->
.
a
)
.
a
->
.
a
/**
* Apply a function as long as a property holds.
*
* @param A property p
* @param A function f
* @param An initial value x
* @result x if not p x, otherwise while p f (f x)
*/
while
::
!(
a
->
.
Bool
)
(
a
->
a
)
a
->
a
/**
* Apply a function until a property holds.
*
* @param A property p
* @param A function f
* @param An initial value x
* @result x if p x, otherwise until p f (f x)
*/
until
::
!(
a
->
.
Bool
)
(
a
->
a
)
a
->
a
/**
* Apply a function a number of times.
*
* @param The number of iterations n
* @param The function
* @param The initial value
* @result The result of applying the function n times to the initial value
*/
iter
::
!
Int
(.
a
->
.
a
)
.
a
->
.
a
import
StdFunctions
// Some handy functions for transforming unique states:
...
...
StdFunc.icl
View file @
33ff5070
implementation
module
StdFunc
// ****************************************************************************************
// Concurrent Clean Standard Library Module Version
2
.0
// Copyright
1995
University of Nijmegen
// Concurrent Clean Standard Library Module Version
3
.0
// Copyright
2018
University of Nijmegen
// ****************************************************************************************
import
StdClass
,
StdMisc
,
StdInt
id
::
!.
a
->
.
a
id
x
=
x
const
::
!.
a
.
b
->
.
a
const
x
y
=
x
//flip::!.(.a -> .(.b -> .c)) .b .a -> .c
flip
f
a
b
:==
f
b
a
(
o
)
infixr
9
;
// :: u:(.a -> .b) u:(.c -> .a) -> u:(.c -> .b)
(
o
)
f
g
:==
\
x
->
f
(
g
x
)
twice
::
!(.
a
->
.
a
)
.
a
->
.
a
twice
f
x
=
f
(
f
x
)
while
::
!(
a
->
.
Bool
)
(
a
->
a
)
a
->
a
while
p
f
x
|
p
x
=
while
p
f
(
f
x
)
=
x
until
::!(
a
->
.
Bool
)
(
a
->
a
)
a
->
a
until
p
f
x
|
p
x
=
x
=
until
p
f
(
f
x
)
iter
::
!
Int
(.
a
->
.
a
)
.
a
->
.
a
iter
0
f
x
=
x
iter
n
f
x
|
n
>
0
=
iter
(
n
-1
)
f
(
f
x
)
=
abort
"Error: Negative index given to iter."
import
StdFunctions
seq
::
![.(.
s
->
.
s
)]
.
s
->
.
s
seq
[
f
:
fs
]
arg
=
seq
fs
(
f
arg
)
...
...
StdFunctions.dcl
View file @
33ff5070
...
...
@@ -5,16 +5,80 @@ definition module StdFunctions
// Copyright 2018 Radboud University
// ****************************************************************************************
id
::
!.
a
->
.
a
// identity function
const
::
!.
a
.
b
->
.
a
// constant function
/**
* The identity function.
*
* @param A value
* @result The same value
*/
id
::
!.
a
->
.
a
//flip :: !.(.a -> .(.b -> .c)) .b .a -> .c // Flip arguments
/**
* The constant function.
*
* @param A value
* @param Another value
* @result The first value
*/
const
::
!.
a
.
b
->
.
a
/**
* Flip the arguments of a function. This is useful in function compositions.
*
* @type !.(.a -> .(.b -> .c)) .b .a -> .c
* @param A function
* @param The second argument to the function
* @param The first argument to the function
* @result The function, applied to its arguments
*/
flip
f
a
b
:==
f
b
a
(
o
)
infixr
9
// :: u:(.a -> .b) u:(.c -> .a) -> u:(.c -> .b) // Function composition
/**
* Function composition.
*
* @type u:(.a -> .b) u:(.c -> .a) -> u:(.c -> .b)
* @param A function f
* @param A function g
* @result The function f o g, that is, f applied after g
*/
(
o
)
infixr
9
(
o
)
f
g
:==
\
x
->
f
(
g
x
)
twice
::
!(.
a
->
.
a
)
.
a
->
.
a
// f (f x)
while
::
!(
a
->
.
Bool
)
(
a
->
a
)
a
->
a
// while (p x) f (f x)
until
::
!(
a
->
.
Bool
)
(
a
->
a
)
a
->
a
// f (f x) until (p x)
iter
::
!
Int
(.
a
->
.
a
)
.
a
->
.
a
// f (f..(f x)..)
/**
* Apply a function twice.
*
* @param A function f
* @param A value x
* @result f (f x)
*/
twice
::
!(.
a
->
.
a
)
.
a
->
.
a
/**
* Apply a function as long as a property holds.
*
* @param A property p
* @param A function f
* @param An initial value x
* @result x if not p x, otherwise while p f (f x)
*/
while
::
!(
a
->
.
Bool
)
(
a
->
a
)
a
->
a
/**
* Apply a function until a property holds.
*
* @param A property p
* @param A function f
* @param An initial value x
* @result x if p x, otherwise until p f (f x)
*/
until
::
!(
a
->
.
Bool
)
(
a
->
a
)
a
->
a
/**
* Apply a function a number of times.
*
* @param The number of iterations n
* @param The function
* @param The initial value
* @result The result of applying the function n times to the initial value
*/
iter
::
!
Int
(.
a
->
.
a
)
.
a
->
.
a
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