c317d683fb
Three fixes that lift seven test programs from skipped to passing, bringing the AOT compiler harness from 56/56 to 63/63. - Unnumbered programs (compiler_main.c): src/compiler_main.c skipped any line that didn't start with a digit, so direct-mode .bas files like hello.bas, math_ops.bas, string_ops.bas (no line numbers) failed with "No program lines found". load_file now auto-assigns line numbers (last_num + 10) to unnumbered lines, with overflow protection at line 65520. - String concatenation in PRINT (codegen.c): emit_str_atom had a broken concat loop that emitted "; _cat = gw_str_concat(&... _cat.sval ...)" — _cat was never declared, so any program with a string-literal concat in PRINT (like PRINT "ABC" + "DEF") failed to link. Concat is properly handled by emit_str_expr's outer loop; remove the dead/broken code in the atom. Fixes string_ops.bas. - Transcendental result type (codegen.c): peek_expr_type returned VT_DBL for ATN/LOG/EXP/VAL, so PRINT formatted them with 15-digit double precision (e.g. 3.141592653589793) while real GW-BASIC and the interpreter format the single-precision result as 3.141593. Real GW-BASIC's transcendentals are single-precision; only CDBL forces double. Demote ATN/LOG/EXP/VAL to VT_SNG; CDBL stays VT_DBL. Fixes math_ops.bas. Also: tests/run_compiler_tests.sh now runs the compiled binary from the project root rather than the tempdir where it was built, so test programs that reference tests/programs/ via relative paths (chain_test, common_test, run_file, misc_stmts) resolve their targets. Earlier I'd misdiagnosed those failures as ON ERROR divergence — they were just CWD-dependent path lookups. Doc/test counts: 56 → 63 in README, docs/index.md, docs/development.md, docs/roadmap.md. Roadmap updated to note the compiler now accepts unnumbered programs.
3.4 KiB
3.4 KiB
Development
Development History
| Version | Commit | Description |
|---|---|---|
| 0.1.0 | d8e8375 |
Expression calculator with direct mode |
| 0.2.0 | 6162595 |
Variables, arrays, program storage, control flow |
| 0.3.0 | c2d73e9 |
File I/O, PRINT USING, SAVE/LOAD, MID$ assignment, graphics stubs |
| 0.4.0 | df5c308 |
CHAIN, RUN "file", random-access I/O (FIELD/PUT/GET), CVI/CVS/CVD/MKI$/MKS$/MKD$ |
| 0.5.0 | ad21350 |
Full-screen TUI editor, KEY statement, Ctrl+Break, Sixel graphics, SOUND/BEEP/PLAY, DOSBox-X compat testing, project rename |
| 0.6.0 | ece018d |
DATE$/TIME$/TIMER, FILES, SHELL, CHDIR, MKDIR, RMDIR |
| 0.7.0 | da6b513 |
AUTO, RENUM (with GOTO/GOSUB patching), DELETE, COMMON, LIST range fix |
| 0.8.0 | c68167c |
Dynamic TUI screen buffer, --full flag, LPRINT/LLIST with --lpt |
| 0.9.0 | 2a8f98b |
EDIT statement, ON TIMER/ON KEY event trapping, F-key escape parser fixes |
| 0.10.0 | Binary tokenized SAVE/LOAD, INKEY$ extended key sequences, golden-file regression tests, classic BASIC programs | |
| 0.11.0 | DEF SEG / PEEK / POKE virtual memory, GET/PUT graphics sprites, PRINT USING fixes | |
| 0.12.0 | BSAVE/BLOAD, TUI ANSI 16-color rendering, CGA graphics framebuffer PEEK/POKE, keyboard shift flags | |
| 0.13.0 | VIEW/WINDOW/PALETTE graphics, PMAP function, MBF float format for CVS/CVD/MKS$/MKD$ | |
| 0.14.0 | MBF binary file compatibility (IEEE↔MBF at save/load boundary), fix binary loader null-byte truncation, fix DRAW M/S/A bugs, add TA/=var;/X substring | |
| 0.15.0 | Hardware I/O simulator, gap-fill (100% token coverage), string pool + compacting GC, Jupyter kernel (Sixel graphics, INPUT, Pygments), ahead-of-time compiler Phase 1 | |
| 0.16.0 | AOT compiler: all eligible tests pass (100%). CHAIN/COMMON/RUN "file" via runtime delegation, token embedding, string comparison, division-by-zero detection, FIELD read-back, graphics, file I/O delegation, RNG matching, dead code elimination | |
| 0.17.0 | 981aeab |
Compiler memory safety (--warn, --safe, --safe=sanitize); 16-bit real-mode DOS target (Makefile.dos16, far-heap TUI screen buffer); 32-bit DOS/4GW target (Makefile.dos); FreeDOS 1.4 compatibility |
Tests
72 automated test programs in tests/programs/, plus 4 classic interactive
programs in tests/classic/ (Hamurabi, Lunar Lander, Gunner, Diamond from
David Ahl's BASIC Computer Games). 14 Jupyter kernel tests. 63 compiler
tests (eligible programs compiled to native executables via
gwbasic-compile; run bash tests/run_compiler_tests.sh).
Run the full automated suite:
bash tests/run_tests.sh # interpreter (72 tests)
python -m gwbasickernel.test_kernel # Jupyter kernel (14 tests)
Each interpreter test has a 5-second timeout. 68 tests have .expected golden
files for output regression detection. Tests without golden comparison:
datetime, on_timer, timer_stop (timing-dependent), color_test (visual).
Compatibility Testing
Compare output against real GWBASIC.EXE running under DOSBox-X:
# Generate .expected files from GWBASIC.EXE (requires DOSBox-X Flatpak)
bash tests/run_compat.sh --generate
# Compare gwbasic output against .expected
bash tests/run_compat.sh
CI
GitHub Actions runs on every push to main and on pull requests. The workflow
builds the project with PulseAudio support and runs all 72 test programs.