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custom.reb
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custom.reb
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REBOL [
Title: "Customize functions"
Author: "giuliolunati@gmail.com"
Version: 0.1.0
Type: module
Name: 'custom
Exports: [custom customize]
]
indented-line: "^/"
indent+: does [append indented-line " "]
indent-: does [loop 4 [take/last indented-line]]
mold-stack: lib/make block! 8
mold-recur?: func [x] [
for-each y mold-stack [
if same? x y [return true]
]
false
]
custom-type?: func [x] [
all [map? x any-function? :x/make]
]
fail-invalid-parameter: func [
func-name [string! word!]
params [block! word!]
] [
either word? params [
fail/where ajoin [
"Invalid parameter for " func-name ": "
custom/form get params
] params
] [
fail/where ajoin [
"Invalid parameters for " func-name ": "
map-each x params [custom/form get x]
] params/1
]
]
customize: proc ['where f:] [
foreach w bind/new words-of custom where [
set w :custom/:w
]
foreach [o p] bind/new infix-alias where [
set/lookback o tighten :custom/:p
]
foreach [a b] bind/new prefix-alias where [
set a :custom/:b
]
]
try-method: func [method arg] [
all [
attempt [method: :arg/custom-type/:method]
attempt [method arg]
]
]
try-method-1: func [method arg1 arg2] [
all [
attempt [method: :arg1/custom-type/:method]
attempt [method arg1 arg2]
]
]
try-method-2: func [method arg1 arg2] [
all [
attempt [method: :arg2/custom-type/:method]
attempt [method arg1 arg2]
]
]
custom: make object! [
make: adapt :lib/make [
if custom-type? get first lookahead [
type: take type
def: take def
exit/from/with 2 type/make type def
]
]
to: adapt :lib/to [
if all [
map? value
custom-type? :value/custom-type
][
exit/from/with 2 value/custom-type/make type value
]
]
form: func [
value [<opt> any-value!]
/delimit delimiter [blank! any-scalar! any-string! block!]
/quote /new
r: frame: delim:
] [
frame: [value: value delimit: delimit if delimit [delimiter: delimiter] quote: quote new: new]
if r: attempt [apply :value/custom-type/form frame]
[return r]
if any [block? :value group? :value] [
r: copy ""
either mold-recur? :value [append r "..."]
[
append/only mold-stack :value
if all[new not quote] [value: reduce :value]
delim: case [
not all [new delimit] [space]
block? delimiter [take delimiter]
true [delimiter]
]
forall value [
if all [delim not head? :value] [append r delim]
append r apply :form [value: value/1 delimit: delimit if delimit [delimiter: delimiter] quote: quote new: new]
]
take/last mold-stack
]
return r
]
if map? :value [
r: copy ""
either mold-recur? :value [append r "..."]
[
append/only mold-stack :value
for-each i :value [repend r [
mold i space
apply :mold [value: select :value i delimit: delimit if delimit [delimiter: delimiter] quote: quote new: new]
indented-line
]]
take/last mold-stack
]
return r
]
if object? :value [
r: copy ""
either mold-recur? :value [append r "..."]
[
append/only mold-stack :value
for-each i :value [repend r [
mold i ": "
apply :mold [value: select :value i delimit: delimit if delimit [delimiter: delimiter] quote: quote new: new]
indented-line
]]
take/last mold-stack
]
return r
]
apply :lib/form frame
]
mold: func [
value [any-value!]
/only /all /flat
r: line: lines:
] [
if r: attempt [
apply :value/custom-type/mold [value: :value only: only all: all flat: flat]
]
[return r]
line: either flat [:newline][:indented-line]
if any [block? :value group? :value] [
if group? :value [only: false]
unless only [indent+]
r: copy either group? :value ["("]
[either only [""] ["["]]
lines: false
either mold-recur? :value [append r "..."]
[
append/only mold-stack :value
forall value [
if new-line? :value [
lines: true
if r > "" [append r line]
]
append r apply :mold [value: value/1 only: false all: all flat: flat]
append r space
]
take/last r
take/last mold-stack
]
unless only [indent- if lines [append r line]]
return append r either group? :value [")"]
[either only [""] ["]"]]
]
if map? :value [
r: copy either all
["#[map! ["] ["make map! ["]
either mold-recur? :value [append r "..."]
[
append/only mold-stack :value
indent+
for-each i :value [repend r [
line
mold i space
apply :mold [value: select :value i only: false all: all flat: flat]
]]
indent-
append r line
take/last mold-stack
]
append r either all ["]]"] [#"]"]
return r
]
if object? :value [
r: copy either all
["#[object! ["] ["make object! ["]
either mold-recur? :value [append r "..."]
[
append/only mold-stack :value
indent+
repend r [line "[self: "]
for-each i :value [repend r [mold i space]]
take/last r
repend r [#"]" line #"["]
indent+
for-each i :value [repend r [
line
mold i ": "
apply :mold [value: select :value i only: false all: all flat: flat]
]]
indent-
repend r [line #"]"]
indent-
take/last mold-stack
]
repend r [line either all ["]]"] ["]"]]
return r
]
apply :lib/mold [value: :value only: only all: all flat: flat]
]
ajoin: func [
block [block!]
/delimit delimiter
] [
unless delimit [delimiter: _]
apply :form [
value: block new: true
delimit: true
delimiter: delimiter
]
]
print: proc [
:lookup [any-value! <...>]
value [any-value! <...>]
/only
/delimit delimiter
/quote
/eval
l: v:
] [
l: first lookup
v: take value
if attempt [apply :value/custom-type/print [
value: v eval: eval quote: quote delimit: delimit
if delimit [delimiter: delimiter]
] ] [leave]
if all [block? v not block? l] [
lib/print v ; fail !!
leave
]
either only [
lib/print/only apply :form [
value: v new: true quote: quote
delimit: true delimiter: _
]
][
lib/print apply :form [
value: v new: true quote: quote
delimit: delimit
if delimit [delimiter: delimiter]
]
]
]
probe: func [value [any-value!] /form] [
lib/print either f
[custom/form :value]
[mold :value]
:value
]
add: func [value1 value2] [any [
attempt [lib/add value1 value2]
try-method-1 'add value1 value2
try-method-2 'add value1 value2
fail-invalid-parameter 'add [value1 value2]
]]
subtract: func [value1 value2] [any [
attempt [lib/subtract value1 value2]
try-method-1 'subtract value1 value2
try-method-2 'subtract value1 value2
fail-invalid-parameter 'subtract [value1 value2]
]]
multiply: func [value1 value2] [any [
attempt [lib/multiply value1 value2]
try-method-1 'multiply value1 value2
try-method-2 'multiply value1 value2
fail-invalid-parameter 'multiply [value1 value2]
]]
divide: func [value1 value2] [any [
attempt [lib/divide value1 value2]
try-method-1 'divide value1 value2
try-method-2 'divide value1 value2
fail-invalid-parameter 'divide [value1 value2]
]]
absolute: func [value] [any [
attempt [lib/absolute value]
try-method 'absolute value
attempt [lib/absolute to decimal! value]
fail-invalid-parameter 'absolute 'value
]]
negate: func [value] [any [
attempt [lib/negate value]
try-method 'negate value
fail-invalid-parameter 'negate 'value
]]
zero?: func [value] [any [
attempt [lib/zero? value]
try-method 'zero? value
fail-invalid-parameter 'zero? 'value
]]
log-e: func [value] [any [
attempt [lib/log-e value]
try-method 'log-e value
attempt [lib/log-e to decimal! value]
fail-invalid-parameter 'log-e 'value
]]
exp: func [value] [any [
attempt [lib/exp value]
try-method 'exp value
attempt [lib/exp to decimal! value]
fail-invalid-parameter 'exp 'value
]]
power: func [number exponent] [any [
attempt [lib/power number exponent]
try-method-1 'power number exponent
try-method-2 'power number exponent
fail-invalid-parameter 'power [number exponent]
]]
square-root: func [value] [any [
attempt [lib/square-root value]
try-method 'square-root value
attempt [lib/square-root to decimal! value]
fail-invalid-parameter 'square-root 'value
]]
sin: func [value] [any [
attempt [lib/sine/radians value]
try-method 'sin value
attempt [lib/sine/radians to decimal! value]
fail-invalid-parameter 'sin 'value
]]
cos: func [value] [any [
attempt [lib/cosine/radians value]
try-method 'cos value
attempt [lib/cosine/radians to decimal! value]
fail-invalid-parameter 'cos 'value
]]
tan: func [value] [any [
attempt [lib/tangent/radians value]
try-method 'tan value
attempt [lib/tangent/radians to decimal! value]
fail-invalid-parameter 'tan 'value
]]
asin: func [value] [any [
attempt [lib/arcsine/radians value]
try-method 'asin value
attempt [lib/arcsine/radians to decimal! value]
fail-invalid-parameter 'asin 'value
]]
acos: func [value] [any [
attempt [lib/arccosine/radians value]
try-method 'acos value
attempt [lib/arccosine/radians to decimal! value]
fail-invalid-parameter 'acos 'value
]]
atan: func [value] [any [
attempt [lib/arctangent/radians value]
try-method 'atan value
attempt [lib/arctangent/radians to decimal! value]
fail-invalid-parameter 'atan 'value
]]
equal?: func [value1 value2 r:] [
if map? value1 [
r: trap [value1/custom-type/equal? value1 value2]
if any [r == true | r == false] [return r]
]
if map? value2 [
r: trap [value2/custom-type/equal? value1 value2]
if any [r == true | r == false] [return r]
]
lib/equal? value1 value2
]
not-equal?: func [value1 value2 r:] [
not equal? value1 value2
]
strict-equal?: func [value1 value2 r:] [
if map? value1 [
r: trap [value1/custom-type/strict-equal? value1 value2]
if any [r == true | r == false] [return r]
]
if map? value2 [
r: trap [value2/custom-type/strict-equal? value1 value2]
if any [r == true | r == false] [return r]
]
lib/equal? value1 value2
]
strict-not-equal?: func [value1 value2 r:] [
not strict-equal? value1 value2
]
lesser?: func [value1 value2 r:] [
r: trap [lib/lesser? value1 value2]
if any [r == true | r == false] [return r]
r: trap [value1/custom-type/lesser? value1 value2]
if any [r == true | r == false] [return r]
r: trap [value2/custom-type/lesser? value1 value2]
if any [r == true | r == false] [return r]
false
]
greater?: func [value1 value2] [
lesser? value2 value1
]
lesser-or-equal?: func [value1 value2 r:] [
r: trap [lib/lesser-or-equal? value1 value2]
if any [r == true | r == false] [return r]
r: trap [value1/custom-type/lesser-or-equal? value1 value2]
if any [r == true | r == false] [return r]
r: trap [value2/custom-type/lesser-or-equal? value1 value2]
if any [r == true | r == false] [return r]
false
]
greater-or-equal?: func [value1 value2] [
lesser-or-equal? value2 value1
]
] ; custom object
infix-alias: [
+ add - subtract
* multiply / divide ** power
= equal? == strict-equal?
!= not-equal? !== strict-not-equal?
< lesser? <= lesser-or-equal?
> greater? >= greater-or-equal?
]
prefix-alias: [abs absolute log log-e sqrt square-root]
; vim: set syn=rebol ts=2 sw=2 sts=2: