Wirth-AT-grammars/TopSpeedV3-grammar

topspeed-grammar

Corpus harness for the historical TopSpeed / JPI V3 dialect, using the sidecar grammar compiler/src/TopSpeed-V3-M2.atg.

The sidecar is a grammar deliverable: it parses the TS-V3 dialect (pragmas, H/C/B literals, ::=, anchored subranges, address constructors, CLASS/IS/VIRTUAL, manifest constants, tagless and trailing-| variant records, ...). Constructs the current backend cannot lower yet still parse and end with the standard SemError(230) marker (parse-now / lower-later), exactly like M2.atg.

Build

./build.sh        # -> build/TSM2   (build/ is git-ignored)

It copies the grammar, the frames and the V3 SymTab/QbeGen/FileIO sources into build/, runs CR -m -C, compiles with gm2 -fiso and links TSM2. Needs the project CR ($HOME/Projets/Projets-Modula2/MyWork/CocoGm2/CR) and GNU Modula-2.

The sidecar uses its own scanner frame — scanner.frm in this directory — which adds TopSpeed conditional compilation (*%T cond*) / (*%F cond*) / (*%E*): a CondFilter blanks the inactive regions of the source buffer (CR/LF kept) before scanning. The define set is {_fdata, _mthread, _fptr, _fcall} (see InitDefs); tune it there. V3's own compiler/src/scanner.frm is left untouched, so the sidecar never affects the self-hosting compiler.

Corpus check

./corpus.sh [corpus-dir]     # default: $HOME/bin/Dos/M2/TS-V3

Runs TSM2 over every .DEF/.MOD, copying each into a scratch tree so the .LST listings never touch the corpus, and reports:

• parse-OK — only the deliberate 230/semantic markers,
• syntax-bad — a real Coco/R error ('x' expected, invalid X).

Current result on the TS-V3 tree (662 files, 352 .DEF + 310 .MOD): 644 parse-OK / 18 syntax-bad — see docs/summary_topspeed-corpus.md.