factor/library/debugger.factor

! :folding=indent:collapseFolds=1:

! $Id$
!
! Copyright (C) 2004 Slava Pestov.
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! modification, are permitted provided that the following conditions are met:
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!    this list of conditions and the following disclaimer.
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! 2. Redistributions in binary form must reproduce the above copyright notice,
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IN: errors
USE: combinators
USE: continuations
USE: kernel
USE: logic
USE: namespaces
USE: prettyprint
USE: stack
USE: stdio
USE: strings
USE: unparser

: standard-dump ( error -- )
    "ERROR: " write error. ;

: parse-dump ( error -- )
    <%
    "error-file" get [ "<interactive>" ] unless* % ":" %
    "error-line-number" get [ 1 ] unless* unparse % ": " %
    %> write
    error.
    
    "error-line" get print
    
    <% "error-col" get " " fill % "^" % %> print ;

: in-parser? ( -- ? )
    "error-line" get "error-col" get and ;

: error-handler-hook
    #! The game overrides this.
    ;

: default-error-handler ( error -- )
    #! Print the error and return to the top level.
    [
        in-parser? [ parse-dump ] [ standard-dump ] ifte terpri

        "Stacks have been reset." print
        ":s :r :n :c show stacks at time of error." print

        java? [ ":j shows Java stack trace." print ] when
        error-handler-hook

    ] when* ;

: :s ( -- ) "error-datastack"  get . ;
: :r ( -- ) "error-callstack"  get . ;
: :n ( -- ) "error-namestack"  get . ;
: :c ( -- ) "error-catchstack" get . ;