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Don't throw if macro expansion fails; this allows macros-in-locals to work in more cases

db4
Slava Pestov 2008-11-21 04:36:52 -06:00
parent 34b8bcf305
commit 883ad5389c
1 changed files with 12 additions and 6 deletions
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18
basis/macros/expander/expander.factor
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@ -37,9 +37,17 @@ M: wrapper expand-macros* wrapped>> literal ;
[ '[ _ ndrop _ nnip call ] [ ] like ] 2map , \ dispatch ,
] bi ;
: expand-macro ( quot -- )
stack [ swap with-datastack >vector ] change
stack get pop >quotation end (expand-macros) ;
: word, ( word -- ) end , ;
: expand-macro ( word quot -- )
'[
drop
stack [ _ with-datastack >vector ] change
stack get pop >quotation end (expand-macros)
] [
drop
word,
] recover ;
: expand-macro? ( word -- quot ? )
dup [ "transform-quot" word-prop ] [ "macro" word-prop ] bi or dup [
@ -47,11 +55,9 @@ M: wrapper expand-macros* wrapped>> literal ;
stack get length <=
] [ 2drop f f ] if ;
: word, ( word -- ) end , ;
M: word expand-macros*
dup expand-dispatch? [ drop expand-dispatch ] [
dup expand-macro? [ nip expand-macro ] [
dup expand-macro? [ expand-macro ] [
drop word,
] if
] if ;