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-- Copyright (c) 1991-2002, The Numerical Algorithms Group Ltd.
-- All rights reserved.
-- Copyright (C) 2007-2012, Gabriel Dos Reis.
-- 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 g_-timer
namespace BOOT
++ All functions defined in this file are `clammed', e.g. they are
++ translated in such a way that they cache results they compute.
)eval BOOTTRAN::$bfClamming := true
--% Functions on $clamList
-- These files are read in by the system so that they can be cached
-- properly. Otherwise, must read in compiled versions and then
-- recompile these, resulting in wasted BPI space.
canCoerceFrom(mr,m) ==
-- bind flag for recording/reporting instantiations
-- (see recordInstantiation)
$insideCanCoerceFrom: local := [mr,m]
canCoerceFrom0(mr,m)
canCoerce(t1, t2) ==
val := canCoerce1(t1, t2) => val
t1 is ['Variable, :.] =>
newMode := getMinimalVarMode(t1, nil)
canCoerce1(t1, newMode) and canCoerce1(newMode, t2)
nil
coerceConvertMmSelection(funName,m1,m2) ==
-- calls selectMms with $Coerce=nil and tests for required
-- target type. funName is either 'coerce or 'convert.
$declaredMode : local:= nil
$reportBottomUpFlag : local:= nil
l := selectMms1(funName,m2,[m1],[m1],nil)
mmS := [[sig,[targ,arg],:pred] for x in l | x is [sig,[.,arg],:pred] and
hasCorrectTarget(m2,sig) and sig is [dc,targ,oarg] and oarg = m1]
mmS and first mmS
++ Note: this function is used in the algebra part.
isValidType form ==
-- returns true IFF form is a type whose arguments satisfy the
-- predicate of the type constructor
-- Note that some forms are said to be invalid because they would
-- cause problems with the interpreter. Thus things like P P I
-- are not valid.
string? form => true
ident? form => false
member(form,$LangSupportTypes) => true
form is ['Record,:selectors] =>
and/[isValidType type for [:.,type] in selectors]
form is ['Enumeration,:args] =>
null (and/[ident? x for x in args]) => false
((# args) = (# removeDuplicates args)) => true
false
form is ['Mapping,:mapargs] =>
null mapargs => false
and/[isValidType type for type in mapargs]
form is ['Union,:args] =>
-- check for a tagged union
args and first args is [":",:.] =>
and/[isValidType type for [:.,type] in args]
null (and/[isValidType arg for arg in args]) => false
((# args) = (# removeDuplicates args)) => true
sayKeyedMsg("S2IR0005",[form])
false
badDoubles := [$QuotientField,:'(Gaussian Complex Polynomial Expression)]
form is [T1, [T2, :.]] and T1 = T2 and member(T1, badDoubles) => nil
form is [=$QuotientField,D] and not isPartialMode(D) and
ofCategory(D,$Field) => nil
form is ['UnivariatePolynomial, x, ['UnivariatePolynomial, y, .]] and x=y =>
nil
form = '(Complex (AlgebraicNumber)) => nil
form is ['Expression, ['Kernel, . ]] => nil
form is [op,:argl] =>
not constructor? op => nil
cosig := getDualSignature op
cosig and null rest cosig => -- niladic constructor
null argl => true
false
null (sig := getConstructorSignature op) => nil
[.,:cl] := sig
-- following line is needed to deal with mutable domains
if # cl ~= # argl and gensym? last argl then argl:= drop(-1,argl)
# cl ~= # argl => nil
cl:= replaceSharps(cl,form)
and/[isValid for x in argl for c in cl] where isValid() ==
categoryForm?(c) =>
evalCategory(x,substitute(x,'_$,c)) and isValidType x
-- Arguments to constructors are general expressions. Below
-- domain constructors are not considered valid arguments (yet).
x' := opOf x
cons? x' or not ident? x' => true -- surely not constructors
getConstructorKindFromDB x' ~= "domain"
selectMms1(op,tar,args1,args2,$Coerce) ==
-- for new compiler/old world compatibility, sometimes have to look
-- for operations given two names.
-- NEW COMPILER COMPATIBILITY ON
op = "^" or op = "**" =>
append(selectMms2("**",tar,args1,args2,$Coerce),
selectMms2("^",tar,args1,args2,$Coerce))
-- NEW COMPILER COMPATIBILITY OFF
selectMms2(op,tar,args1,args2,$Coerce)
resolveTT(t1,t2) ==
-- resolves two types
-- this symmetric resolve looks for a type t to which both t1 and t2
-- can be coerced
-- if resolveTT fails, the result will be nil
startTimingProcess 'resolve
t1 := eqType t1
t2 := eqType t2
null (t := resolveTT1(t1,t2)) =>
stopTimingProcess 'resolve
nil
isValidType (t := eqType t) =>
stopTimingProcess 'resolve
t
stopTimingProcess 'resolve
nil
isLegitimateMode(t,hasPolyMode,polyVarList) ==
-- returns true IFF t is a valid type. i.e. if t has no repeated
-- variables, or two levels of Polynomial
null t => true -- a terminating condition with underDomainOf
t = $EmptyMode => true
string? t => true
t isnt [.,:.] => false
badDoubles := [$QuotientField,:'(Gaussian Complex Polynomial Expression)]
t is [T1, [T2, :.]] and T1 = T2 and member(T1, badDoubles) => false
t is [=$QuotientField,D] and not isPartialMode(D) and
ofCategory(D,$Field) => false
t = '(Complex (AlgebraicNumber)) => false
t := equiType t
vl := isPolynomialMode t =>
if vl~='all then
var:= or/[(member(x,polyVarList) => x;nil) for x in vl] => return false
listOfDuplicates vl => return false
polyVarList:= union(vl,polyVarList)
hasPolyMode => false
con := first t
poly? := (con is 'Polynomial or con is 'Expression)
isLegitimateMode(underDomainOf t,poly?,polyVarList)
ident?(op := first t) and constructor? op =>
isLegitimateMode(underDomainOf t,hasPolyMode,polyVarList) => t
t is ['Mapping,:ml] =>
null ml => false
-- first arg is target, which can be Void
null isLegitimateMode(first ml,nil,nil) => false
for m in rest ml repeat
m = $Void =>
return false
null isLegitimateMode(m,nil,nil) => return false
true
t is ['Union,:ml] =>
-- check for tagged union
ml and first ml is [":",:.] => isLegitimateRecordOrTaggedUnion ml
null (and/[isLegitimateMode(m,nil,nil) for m in ml]) => false
((# ml) = (# removeDuplicates ml)) => true
false
t is ['Record,:r] => isLegitimateRecordOrTaggedUnion r
t is ['Enumeration,:r] =>
null (and/[ident? x for x in r]) => false
((# r) = (# removeDuplicates r)) => true
false
false
underDomainOf t ==
t = $RationalNumber => $Integer
t isnt [.,:.] => nil
d := deconstructT t
1 = #d => nil
u := getUnderModeOf(t) => u
last d
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