axiom-test 20120501-8 / usr / share / axiom-20120501 / input / assign.input

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/usr/share/axiom-20120501/input/assign.input is in axiom-test 20120501-8.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below. 

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)set break resume
)spool assign.output
)set message test on
)set message auto off
)clear all

-- This file shows the difference between assignments and rewrite
-- rules.
--S 1 of 11
a := 1
--R 
--R
--R   (1)  1
--R                                                        Type: PositiveInteger
--E 1

--S 2 of 11
b := a         -- the value of b is now 1
--R 
--R
--R   (2)  1
--R                                                        Type: PositiveInteger
--E 2

--S 3 of 11
b              -- see, told you
--R 
--R
--R   (3)  1
--R                                                        Type: PositiveInteger
--E 3

--S 4 of 11
a := 2         -- what is the value of b?
--R 
--R
--R   (4)  2
--R                                                        Type: PositiveInteger
--E 4

--S 5 of 11
b              -- it is the value it had AT ASSIGNMENT
--R 
--R
--R   (5)  1
--R                                                        Type: PositiveInteger
--E 5

--S 6 of 11
c == 1         -- c is a rule
--R 
--R                                                                   Type: Void
--E 6

--S 7 of 11
c              -- it will evaluate to 1
--R 
--R   Compiling body of rule c to compute value of type PositiveInteger 
--R
--R   (7)  1
--R                                                        Type: PositiveInteger
--E 7

--S 8 of 11
d == c         -- d is a rule that will evaluate to c
--R 
--R                                                                   Type: Void
--E 8

--S 9 of 11
d
--R 
--R   Compiling body of rule d to compute value of type PositiveInteger 
--R
--R   (9)  1
--R                                                        Type: PositiveInteger
--E 9

--S 10 of 11
c == 2         -- we have changed the rule for c
--R 
--R   Compiled code for c has been cleared.
--R   Compiled code for d has been cleared.
--R   1 old definition(s) deleted for function or rule c 
--R                                                                   Type: Void
--E 10

--S 11 of 11
d              -- and so the ultimate value computed from d will change
--R 
--R   Compiling body of rule c to compute value of type PositiveInteger 
--R   Compiling body of rule d to compute value of type PositiveInteger 
--R
--R   (11)  2
--R                                                        Type: PositiveInteger
--E 11
)spool
)lisp (bye)

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