1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
|
-- Copyright (c) 1991-2002, The Numerical ALgorithms Group Ltd.
-- All rights reserved.
--
-- Redistribution and use in source and binary forms, with or without
-- modification, are permitted provided that the following conditions are
-- met:
--
-- - Redistributions of source code must retain the above copyright
-- notice, this list of conditions and the following disclaimer.
--
-- - Redistributions in binary form must reproduce the above copyright
-- notice, this list of conditions and the following disclaimer in
-- the documentation and/or other materials provided with the
-- distribution.
--
-- - Neither the name of The Numerical ALgorithms Group Ltd. nor the
-- names of its contributors may be used to endorse or promote products
-- derived from this software without specific prior written permission.
--
-- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
-- IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
-- TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
-- PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
-- OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
-- EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
-- PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
-- PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
-- LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
-- NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-- SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
import i_-object
namespace BOOT
--% Interpreter Code Generation Routines
--Modified by JHD 9/9/93 to fix a problem with coerces inside
--interpreter functions being used as mappings. They were being
--handled with $useCoerceOrCroak being NIL, and therefore internal
--coercions were not correctly handled. Fix: remove dependence
--on $useCoerceOrCroak, and test explicitly for Mapping types.
--% COERCE
intCodeGenCOERCE(triple,t2) ==
-- NOTE: returns a triple
t1 := objMode triple
t1 = $EmptyMode => NIL
t1 = t2 => triple
val := objVal triple
-- if request is for a coerce to t2 from a coerce from
-- to to t1, and t1 = Void or canCoerce(t0,t2), then optimize
(val is ['coerceOrCroak,trip,t1', .]) and
(t0 := objCodeMode trip) and ([.,val0] := objCodeVal trip) and
( (t1 = $Void) or canCoerceFrom(removeQuote t0,t2) ) =>
-- just generate code for coercion, don't coerce constants
-- might be too big
intCodeGenCOERCE(objNew(val0, removeQuote t0), t2)
val is ['THROW,label,code] =>
if label is ['QUOTE, l] then label := l
null($compilingMap) or (label ~= mapCatchName($mapName)) =>
objNew(['THROW,label,getValueNormalForm
intCodeGenCOERCE(objNew(code,t1),t2)],t2)
-- we have a return statement. just send it back as is
objNew(val,t2)
val is ['PROGN,:code,lastCode] =>
objNew(['PROGN,:code,getValueNormalForm
intCodeGenCOERCE(objNew(lastCode,t1),t2)],t2)
val is ['COND,:conds] =>
objNew(['COND,
:[[p,getValueNormalForm intCodeGenCOERCE(objNew(v,t1),t2)]
for [p,v] in conds]],t2)
-- specially handle subdomain
absolutelyCanCoerceByCheating(t1,t2) => objNew(val,t2)
-- specially handle coerce to Any
t2 = '(Any) => objNew(['CONS,MKQ t1,val],t2)
-- optimize coerces from Any
(t1 = '(Any)) and (val is [ ='CONS,t1',val']) =>
intCodeGenCOERCE(objNew(val',removeQuote t1'),t2)
-- specially handle coerce from Equation to Boolean
(t1 is ['Equation,:.]) and (t2 = $Boolean) =>
coerceByFunction(triple,t2)
-- next is hack for if-then-elses
(t1 = '$NoValueMode) and (val is ['COND,pred]) =>
code :=
['COND,pred,
[MKQ true,['throwKeyedMsg,MKQ "S2IM0016",MKQ $mapName]]]
objNew(code,t2)
-- optimize coerces to Expression
t2 = $OutputForm =>
coerceByFunction(triple,t2)
isSubDomain(t1, $Integer) =>
intCodeGenCOERCE(objNew(val, $Integer), t2)
-- generate code
-- 1. See if the coercion will go through (absolutely)
-- Must be careful about variables or else things like
-- P I --> P[x] P I might not have the x in the original polynomial
-- put in the correct place
(not containsVariables(t2)) and canCoerceByFunction(t1,t2) =>
-- try coerceByFunction
(not canCoerceByMap(t1,t2)) and
(code := coerceByFunction(triple,t2)) => code
intCodeGenCoerce1(val,t1,t2)
-- 2. Set up a failure point otherwise
intCodeGenCoerce1(val,t1,t2)
intCodeGenCoerce1(val,t1,t2) ==
-- Internal function to previous one
-- designed to ensure that we don't use coerceOrCroak on mappings
--(t2 is ['Mapping,:.]) => THROW('coerceOrCroaker, 'croaked)
objNew(['coerceOrCroak,objNewCode(['wrap,val],t1),
MKQ t2, MKQ $mapName],t2)
--% Map components
wrapMapBodyWithCatch body ==
-- places a CATCH around the map body
-- note that we will someday have to fix up the catch identifier
-- to use the generated internal map name
$mapThrowCount = 0 => body
if body is ['failCheck,['coerceOrFail,trip,targ,mapn]]
then
trip is ['LIST,v,m,e] =>
['failCheck,['coerceOrFail,
['LIST,['CATCH,MKQ mapCatchName $mapName, v],m,e],targ,mapn]]
keyedSystemError("S2GE0016",['"wrapMapBodyWithCatch",
'"bad CATCH for in function form"])
else ['CATCH,MKQ mapCatchName $mapName,body]
|
