-! Copyright (C) 2007, 2008 Slava Pestov, Eduardo Cavazos.
-! See http://factorcode.org/license.txt for BSD license.
-USING: accessors arrays assocs classes classes.tuple fry
-sequences.generalizations hashtables kernel locals locals.backend
-locals.errors locals.types make math quotations sequences vectors
-words ;
-IN: locals.rewrite.sugar
-
-! Step 1: rewrite [| into :> forms, turn
-! literals with locals in them into code which constructs
-! the literal after pushing locals on the stack
-
-GENERIC: rewrite-sugar* ( obj -- )
-
-: (rewrite-sugar) ( form -- form' )
- [ rewrite-sugar* ] [ ] make ;
-
-GENERIC: quotation-rewrite ( form -- form' )
-
-M: callable quotation-rewrite [ [ rewrite-sugar* ] each ] [ ] make ;
-
-: var-defs ( vars -- defs )
- [ [ ] ] [ <multi-def> 1quotation ] if-empty ;
-
-M: lambda quotation-rewrite
- [ body>> ] [ vars>> var-defs ] bi prepend quotation-rewrite ;
-
-M: callable rewrite-sugar* quotation-rewrite , ;
-
-M: lambda rewrite-sugar* quotation-rewrite , ;
-
-GENERIC: rewrite-literal? ( obj -- ? )
-
-M: special rewrite-literal? drop t ;
-
-M: array rewrite-literal? [ rewrite-literal? ] any? ;
-
-M: quotation rewrite-literal? [ rewrite-literal? ] any? ;
-
-M: vector rewrite-literal? [ rewrite-literal? ] any? ;
-
-M: wrapper rewrite-literal? wrapped>> rewrite-literal? ;
-
-M: hashtable rewrite-literal? >alist rewrite-literal? ;
-
-M: tuple rewrite-literal? tuple>array rewrite-literal? ;
-
-M: object rewrite-literal? drop f ;
-
-GENERIC: rewrite-element ( obj -- )
-
-: rewrite-elements ( seq -- )
- [ rewrite-element ] each ;
-
-: rewrite-sequence ( seq -- )
- [ rewrite-elements ] [ length ] [ 0 head ] tri '[ _ _ nsequence ] % ;
-
-M: array rewrite-element
- dup rewrite-literal? [ rewrite-sequence ] [ , ] if ;
-
-M: vector rewrite-element
- dup rewrite-literal? [ rewrite-sequence ] [ , ] if ;
-
-M: hashtable rewrite-element
- dup rewrite-literal? [ >alist rewrite-sequence \ >hashtable , ] [ , ] if ;
-
-M: tuple rewrite-element
- dup rewrite-literal? [
- [ tuple-slots rewrite-elements ] [ class-of ] bi '[ _ boa ] %
- ] [ , ] if ;
-
-M: quotation rewrite-element rewrite-sugar* ;
-
-M: lambda rewrite-element rewrite-sugar* ;
-
-M: let rewrite-element let-form-in-literal-error ;
-
-M: local rewrite-element , ;
-
-M: local-reader rewrite-element , ;
-
-M: local-writer rewrite-element
- local-writer-in-literal-error ;
-
-M: word rewrite-element <wrapper> , ;
-
-: rewrite-wrapper ( wrapper -- )
- dup rewrite-literal? [ wrapped>> rewrite-element ] [ , ] if ;
-
-M: wrapper rewrite-element
- rewrite-wrapper \ <wrapper> , ;
-
-M: object rewrite-element , ;
-
-M: array rewrite-sugar* rewrite-element ;
-
-M: vector rewrite-sugar* rewrite-element ;
-
-M: tuple rewrite-sugar* rewrite-element ;
-
-M: multi-def rewrite-sugar* , ;
-
-M: hashtable rewrite-sugar* rewrite-element ;
-
-M: wrapper rewrite-sugar*
- rewrite-wrapper ;
-
-M: word rewrite-sugar*
- dup { load-locals get-local drop-locals } member-eq?
- [ >r/r>-in-lambda-error ] [ call-next-method ] if ;
-
-M: object rewrite-sugar* , ;
-
-M: let rewrite-sugar*
- body>> quotation-rewrite % ;