* interp/i-code.boot: Move content to i-coerce.boot. Delete.

1 files changed, 111 insertions, 0 deletions

diff --git a/src/interp/i-coerce.boot b/src/interp/i-coerce.boot
index 89e1699b..a56ae5d1 100644
--- a/src/interp/i-coerce.boot
+++ b/src/interp/i-coerce.boot
@@ -1361,3 +1361,114 @@ hasCorrectTarget(m,sig is [dc,tar,:.]) ==
   tar is ['Union,t,'failed] => t=m
   tar is ['Union,'failed,t] and t=m
 
+
+--% 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 ['%when,:conds] =>
+    objNew(['%when,
+      :[[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 ['%when,pred]) =>
+    code :=
+      ['%when,pred,
+        ['%otherwise,['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]