diff options
Diffstat (limited to 'src/boot/ast.boot')
| -rw-r--r-- | src/boot/ast.boot | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/src/boot/ast.boot b/src/boot/ast.boot index e7a6f85e..0e485759 100644 --- a/src/boot/ast.boot +++ b/src/boot/ast.boot @@ -371,7 +371,7 @@ bfCollect(y,itl) == y is ["COLON",a] => bfListReduce('APPEND,['reverse,a],itl) y is ["TUPLE",:.] => bfListReduce('APPEND,['reverse,bfConstruct y],itl) - bfListReduce('CONS,y,itl) + bfDoCollect(['CONS,y,'NIL],itl,'CDR) bfListReduce(op,y,itl)== g := bfGenSymbol() @@ -379,6 +379,15 @@ bfListReduce(op,y,itl)== extrait := [[[g],[nil],[],[],[],[['reverse!,g]]]] bfLp2(extrait,itl,body) +bfDoCollect(expr,itl,adv) == + head := bfGenSymbol() -- pointer to the result + prev := bfGenSymbol() -- pointer to the previous cell + body := + ['COND,[['NULL,head],['SETQ,head,['SETQ,prev,expr]]], + ["T",bfMKPROGN [['RPLACD,prev,expr],['SETQ,prev,[adv,prev]]]]] + extrait := [[[head,prev],['NIL,'NIL],nil,nil,nil,[head]]] + bfLp2(extrait,itl,body) + bfLp1(iters,body)== [vars,inits,sucs,filters,exits,value] := bfSep bfAppend iters nbody := |