! Copyright (C) 2008, 2009 Slava Pestov.
! See http://factorcode.org/license.txt for BSD license.
-USING: io kernel macros make multiline namespaces parser
-present sequences strings splitting fry accessors ;
+USING: accessors fry generalizations io io.streams.string kernel
+make math math.order math.parser multiline namespaces present
+sequences splitting strings vocabs.parser ;
IN: interpolate
<PRIVATE
-TUPLE: interpolate-var name ;
+TUPLE: named-var name ;
-: (parse-interpolate) ( string -- )
+TUPLE: stack-var n ;
+
+TUPLE: anon-var ;
+
+: (parse-interpolate) ( str -- )
[
- "${" split1-slice [ >string , ] [
+ "${" split1-slice [
+ [ >string , ] unless-empty
+ ] [
[
"}" split1-slice
- [ >string interpolate-var boa , ]
+ [
+ >string dup string>number
+ [ 1 + stack-var boa ]
+ [ [ anon-var new ] [ named-var boa ] if-empty ] ?if ,
+ ]
[ (parse-interpolate) ] bi*
] when*
] bi*
] unless-empty ;
-: parse-interpolate ( string -- seq )
- [ (parse-interpolate) ] { } make ;
+: deanonymize ( seq -- seq' )
+ 0 over <reversed> [
+ dup anon-var? [
+ drop 1 + dup stack-var boa
+ ] when
+ ] map! 2drop ;
+
+: parse-interpolate ( str -- seq )
+ [ (parse-interpolate) ] { } make deanonymize ;
+
+: max-stack-var ( seq -- n/f )
+ f [
+ dup stack-var? [ n>> [ or ] keep max ] [ drop ] if
+ ] reduce ;
+
+:: (interpolate-quot) ( str quot -- quot' )
+ str parse-interpolate :> args
+ args max-stack-var :> vars
-: (interpolate) ( string quot -- quot' )
- [ parse-interpolate ] dip '[
- dup interpolate-var?
- [ name>> @ '[ _ @ present write ] ]
- [ '[ _ write ] ]
- if
- ] map [ ] join ; inline
+ args [
+ dup named-var? [
+ name>> quot call '[ _ @ present write ]
+ ] [
+ dup stack-var? [
+ n>> '[ _ npick present write ]
+ ] [
+ '[ _ write ]
+ ] if
+ ] if
+ ] map concat
+
+ vars [
+ '[ _ ndrop ] append
+ ] when* ; inline
PRIVATE>
-MACRO: interpolate ( string -- )
- [ [ get ] ] (interpolate) ;
+: interpolate-quot ( str -- quot )
+ [ [ get ] ] (interpolate-quot) ;
+
+MACRO: interpolate ( str -- quot )
+ interpolate-quot ;
+
+: interpolate>string ( str -- newstr )
+ [ interpolate ] with-string-writer ; inline
+
+: interpolate-locals-quot ( str -- quot )
+ [ dup search [ [ ] ] [ [ get ] ] ?if ] (interpolate-quot) ;
+
+MACRO: interpolate-locals ( str -- quot )
+ interpolate-locals-quot ;
-: interpolate-locals ( string -- quot )
- [ search [ ] ] (interpolate) ;
+: interpolate-locals>string ( str -- newstr )
+ [ interpolate-locals ] with-string-writer ; inline
-: I[
- "]I" parse-multiline-string
- interpolate-locals over push-all ; parsing
+SYNTAX: [I
+ "I]" parse-multiline-string
+ interpolate-locals-quot append! ;