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feat(v4.0.0): every error is raised and ends the line (D-18)

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Ruled 2026-10-04: guard all errors.  The errors that set NODE-ERROR and
let the line run on now stop it at once, with a message.

- A store of a non-zero code to NODE-ERROR is a trap, a sixth kind of
  fault: nothing after it executes, the return stack is emptied, and the
  data stack is left as the word left it.  Not attached, NODE-ERROR is
  plain memory, as the tests below the prompt use it.
- The capsule's words store a code where they stored -1, and the prompt's
  (RAISED) prints its message: Negative count, Not a number, Number too
  long, Not a character, Dictionary full, Name missing, Control structure
  mismatch, Control structures too deep.
- ' and COMPILE and [COMPILE] of a word that is not there say
  UNKNOWN WORD: 'xxx', as the interpreter does.
- tests: the trap in test_exec.c; every message from the prompt, with the
  rest of the line not run and the stack kept, in test_host_quit.c.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
rajames
2026-10-04 20:13:23 -04:00
co-authored by Claude Opus 5.5
parent 644bfc0a25
commit dc7e37ba5c
12 changed files with 181 additions and 38 deletions
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v4/capsule/quit.v4
+21 -2
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@@ -87,11 +87,30 @@ header ABORT
$75746552 (EMIT4) $73206E72 (EMIT4) $6B636174 (EMIT4) $646E7520 (EMIT4) $6C667265 (EMIT4) $776F (EMIT4) CR
2 jump (REPL)
\ The table the loader gives the node: five words, one for each kind of
\ A word has stored an error code in NODE-ERROR (D-18; the codes are listed
\ in core.v4). Print its message -- a negative code means the word printed
\ its own -- and end the line with ERROR. The return stack has been
\ emptied; the data stack is as the word left it.
: (RAISED)
NODE-ERROR b! @b
-if POS drop 2 jump (REPL)
POS: -1 + if M1 -1 + if M2 -1 + if M3 -1 + if M4
-1 + if M5 -1 + if M6 -1 + if M7 -1 + if M8
drop 2 jump (REPL)
M1: drop $6167654E (EMIT4) $65766974 (EMIT4) $756F6320 (EMIT4) $746E (EMIT4) CR 2 jump (REPL)
M2: drop $20746F4E (EMIT4) $756E2061 (EMIT4) $7265626D (EMIT4) CR 2 jump (REPL)
M3: drop $626D754E (EMIT4) $74207265 (EMIT4) $6C206F6F (EMIT4) $676E6F (EMIT4) CR 2 jump (REPL)
M4: drop $20746F4E (EMIT4) $68632061 (EMIT4) $63617261 (EMIT4) $726574 (EMIT4) CR 2 jump (REPL)
M5: drop $74636944 (EMIT4) $616E6F69 (EMIT4) $66207972 (EMIT4) $6C6C75 (EMIT4) CR 2 jump (REPL)
M6: drop $656D614E (EMIT4) $73696D20 (EMIT4) $676E6973 (EMIT4) CR 2 jump (REPL)
M7: drop $746E6F43 (EMIT4) $206C6F72 (EMIT4) $75727473 (EMIT4) $72757463 (EMIT4) $696D2065 (EMIT4) $74616D73 (EMIT4) $6863 (EMIT4) CR 2 jump (REPL)
M8: drop $746E6F43 (EMIT4) $206C6F72 (EMIT4) $75727473 (EMIT4) $72757463 (EMIT4) $74207365 (EMIT4) $64206F6F (EMIT4) $706565 (EMIT4) CR 2 jump (REPL)
\ The table the loader gives the node: six words, one for each kind of
\ fault in the node's order, each a jump. A jump fills its word, so they
\ are one after another.
: (FAULTS)
jump (FAULT) jump (D-OVER) jump (D-UNDER) jump (R-OVER) jump (R-UNDER)
jump (FAULT) jump (D-OVER) jump (D-UNDER) jump (R-OVER) jump (R-UNDER) jump (RAISED)
\ ---- text in the source ---------------------------------------------------------
\ ." and ABORT" take the text up to the next " , which may be none at all