diff options
Diffstat (limited to 'src/interp/g-util.boot')
| -rw-r--r-- | src/interp/g-util.boot | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/src/interp/g-util.boot b/src/interp/g-util.boot index 7e15d637..a43ff7c7 100644 --- a/src/interp/g-util.boot +++ b/src/interp/g-util.boot @@ -38,6 +38,7 @@ import daase namespace BOOT module g_-util where + abstraction?: %Form -> %Boolean getTypeOfSyntax: %Form -> %Mode pairList: (%List %Form,%List %Form) -> %List %Pair(%Form,%Form) mkList: %List %Form -> %Form @@ -46,9 +47,13 @@ module g_-util where isDefaultPackageName: %Symbol -> %Boolean makeDefaultPackageName: %String -> %Symbol spliceSeqArgs: %List %Code -> %Code + mkSeq: %List %Code -> %Code --% +abstraction? x == + x is [op,:.] and ident? op and abstractionOperator? op + hasNoLeave?(expr,g) == expr is ['%leave, =g,:.] => false expr isnt [.,:.] => true @@ -68,6 +73,10 @@ mkBind(inits,expr) == mkBind([:inits,:inits'],expr') ['%bind,inits,expr] +mkSeq stmts == + stmts is [s] => s + ['%seq,:stmts] + ++ Given a (possibly multiple) assignment expression `u', return ++ the list of all assignment sub-expressions that must be evaluated before ++ effecting the toplevel assignment indicated by `u'. In that case, @@ -101,6 +110,18 @@ spliceSeqArgs l == l.rest := spliceSeqArgs rest l l +++ Apply the function `f' on all non-atomic subforms of `x' in +++ depth-first walk. Mutate `x' in place, replacing each sub-form +++ with the result of applying `f' to that subform. +walkWith!(x,f) == + atomic? x => x + abstraction? x => + x.absBody := walkWith!(x.absBody,f) + x + for ys in tails x | not atomic? first ys repeat + ys.first := walkWith!(first ys,f) + apply(f,x,nil) + --% ++ List of category constructors that do not have entries in the |