factor/library/platform/native/parse-stream.factor

!:folding=indent:collapseFolds=1:

! $Id$
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! Copyright (C) 2004 Slava Pestov.
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IN: parser
USE: arithmetic
USE: combinators
USE: errors
USE: lists
USE: namespaces
USE: stack
USE: stdio
USE: streams

: next-line ( -- str )
    "parse-stream" get freadln
    "line-number" succ@ ;

: (read-lines) ( quot -- )
    next-line dup [
        swap dup >r call r> (read-lines)
    ] [
        2drop
    ] ifte ;

: read-lines ( stream quot -- )
    #! Apply a quotation to each line as its read. Close the
    #! stream.
    swap [
        "parse-stream" set 0 "line-number" set (read-lines)
    ] [
        "parse-stream" get fclose rethrow
    ] catch ;

: init-parser ( name -- seed )
    "parse-name" set
    "user" "in" set
    [ "builtins" "user" ] "use" set
    f ;

: parse-stream ( name stream -- code )
    <namespace> [
        >r init-parser r> [ (parse) ] read-lines nreverse
    ] bind ;

: parse-file ( file -- code )
    dup "r" <file-stream> parse-stream ;

: run-file ( file -- )
    parse-file call ;