factor/extra/fuel/eval/eval.factor

65 lines
1.9 KiB
Factor

! Copyright (C) 2009 Jose Antonio Ortega Ruiz.
! See http://factorcode.org/license.txt for BSD license.
USING: accessors arrays continuations debugger fry fuel.pprint io
io.streams.string kernel listener namespaces parser.notes
prettyprint.config sequences sets vocabs.parser ;
IN: fuel.eval
SYMBOL: restarts-stack
V{ } clone restarts-stack set-global
SYMBOL: eval-res-flag
t eval-res-flag set-global
: eval-restartable? ( -- ? )
eval-res-flag get-global ;
: push-status ( -- )
restarts get-global clone restarts-stack get push ;
: pop-restarts ( restarts -- )
eval-restartable? [ drop ] [ clone restarts set-global ] if ;
: pop-status ( -- )
restarts-stack get [ pop pop-restarts ] unless-empty ;
: send-retort ( error result output -- )
3array [ fuel-pprint ] without-limits flush nl
"<~FUEL~>" write nl flush ;
: begin-eval ( -- )
push-status ;
: end-eval ( result error/f output -- )
swapd send-retort pop-status ;
: eval ( lines -- result error/f )
'[ _ parse-lines-interactive call( -- x ) f ]
[ dup print-error f swap ] recover ;
: eval-usings ( usings -- )
[ [ use-vocab ] curry ignore-errors ] each ;
: eval-in ( in -- )
[ set-current-vocab ] when* ;
: eval-in-context ( lines in usings/f -- )
begin-eval
[
parser-quiet? on
[
! The idea is that a correct usings list should always be
! specified. But a lot of code in FUEL sends empty usings
! lists so then we have to use the current manifests
! vocabs instead.
manifest get search-vocab-names>> members
] [
! These vocabs are always needed in the manifest. syntax for
! obvious reasons, fuel for FUEL stuff and debugger for the :N
! words.
{ "fuel" "syntax" "debugger" } prepend
] if-empty
<manifest> manifest namespaces:set
[ eval-usings eval-in eval ] with-string-writer
] with-scope end-eval ;