HUhu3·Oct 2, 2025
Nice! The whole implementation seems to be a bit over 1k lines. https://github.com/zig-wasm/zorth/blob/main/src/zorth.zig
The tests give some examples of what to try like: 65 EMIT
const tests = .{
.{ "65 EMIT ", "A" },
.{ "777 65 EMIT ", "A" },
.{ "32 DUP + 1+ EMIT ", "A" },
.{ "16 DUP 2DUP + + + 1+ EMIT ", "A" },
.{ "8 DUP * 1+ EMIT ", "A" },
.{ "CHAR A EMIT ", "A" },
.{ ": SLOW WORD FIND >CFA EXECUTE ; 65 SLOW EMIT ", "A" },
.{ fmt.comptimePrint("{d} DSP@ 8 TELL ", .{s}), "SYSCALL0" },
.{ fmt.comptimePrint("{d} DSP@ HERE @ 8 CMOVE HERE @ 8 TELL ", .{s}), "SYSCALL0" },
.{ fmt.comptimePrint("{d} DSP@ 2 NUMBER DROP EMIT ", .{mem.readInt(u16, "65", .little)}), "A" },
.{ "64 >R RSP@ 1 TELL RDROP ", "@" },
.{ "64 DSP@ RSP@ SWAP C@C! RSP@ 1 TE
Read the rest
LL ", "@" },
.{ "64 >R 1 RSP@ +! RSP@ 1 TELL ", "A" },
.{
\\: <BUILDS WORD CREATE DODOES , 0 , ;
\\: DOES> R> LATEST @ >DFA ! ;
\\: CONST <BUILDS , DOES> @ ;
\\
\\65 CONST FOO
\\FOO EMIT
,
"A",
},
.{ preamble ++ "VERSION . ", "47 " },
.{ preamble ++ "CR ", "\n" },
.{ preamble ++ "0 1 > . 1 0 > . ", "0 -1 " },
.{ preamble ++ "0 1 >= . 0 0 >= . ", "0 -1 " },
.{ preamble ++ "0 0<> . 1 0<> . ", "0 -1 " },
.{ preamble ++ "1 0<= . 0 0<= . ", "0 -1 " },
.{ preamble ++ "-1 0>= . 0 0>= . ", "0 -1 " },
.{ preamble ++ "0 0 OR . 0 -1 OR . ", "0 -1 " },
.{ preamble ++ "-1 -1 XOR . 0 -1 XOR . ", "0 -1 " },
.{ preamble ++ "-1 INVERT . 0 INVERT . ", "0 -1 " },
.{ preamble ++ "3 4 5 .S ", "5 4 3 " },
.{ preamble ++ "1 2 3 4 2SWAP .S ", "2 1 4 3 " },
.{ preamble ++ "F_IMMED F_HIDDEN .S ", "32 128 " },
.{ preamble ++ ": CFA@ WORD FIND >CFA @ ; CFA@ >DFA DOCOL = . ", "-1 " },
.{ preamble ++ "3 4 5 WITHIN . ", "0 " },
.{ preamble ++ fmt.comptimePrint(": GETPPID {d} SYSCALL0 ; GETPPID . ", .{@intFromEnum(syscalls.X64.getppid)}), p },
.{ preamble ++ "ARGC . ", "2 " },
.{ preamble ++ "ENVIRON @ DUP STRLEN TELL ", mem.sliceTo(os.environ[0], 0) },
.{ preamble ++ "SEE >DFA ", ": >DFA >CFA 8+ EXIT ;\n" },
.{ preamble ++ "SEE HIDE ", ": HIDE WORD FIND HIDDEN ;\n" },
.{ preamble ++ "SEE QUIT ", ": QUIT R0 RSP! INTERPRET BRANCH ( -16 ) ;\n" },
.{
preamble ++
\\: FOO THROW ;
\\: TEST-EXCEPTIONS 25 ['] FOO CATCH ?DUP IF ." FOO threw exception: " . CR DROP THEN ;
\\TEST-EXCEPTIONS
,
"FOO threw exception: 25 \n",
},