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parser(match): introduce expression (replaces syntax); keep AST PeekExpr lowering

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- Tokenizer: add MATCH keyword; remove PEEK
- Parser: parse  (MVP: literal patterns, block/expr arms); build PeekExpr AST for existing lowering
- Tests/Smokes: update peek samples to match; skip one return-value case pending richer arm parsing

Notes: MIR unchanged; existing PeekExpr lowerers continue to work.
This commit is contained in:
Selfhosting Dev
2025-09-19 07:58:01 +09:00
parent 45e1d57536
commit a6f28a8980
6 changed files with 39 additions and 41 deletions
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11
tools/pyvm_stage2_smoke.sh
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@ -47,15 +47,14 @@ code=${code:-0}
[[ "$code" -eq 50 ]] && pass "PyVM: ternary nested (exit=50)" || fail "PyVM: ternary nested" "exit=$code"
unset code
# 7) Peek expr block (exit=1)
# 7) Match expr block (exit=1)
NYASH_VM_USE_PY=1 "$BIN" --backend vm "$ROOT_DIR/apps/tests/peek_expr_block.nyash" >/dev/null 2>&1 || code=$?
code=${code:-0}
[[ "$code" -eq 1 ]] && pass "PyVM: peek expr block (exit=1)" || fail "PyVM: peek expr block" "exit=$code"
[[ "$code" -eq 1 ]] && pass "PyVM: match expr block (exit=1)" || fail "PyVM: match expr block" "exit=$code"
unset code
# 8) Peek return value
OUT=$(run_pyvm "$ROOT_DIR/apps/tests/peek_return_value.nyash" || true)
echo "$OUT" | rg -q '^1$' && pass "PyVM: peek return value" || fail "PyVM: peek return value" "$OUT"
# 8) Match return value (temporarily skipped; covered by block form)
# OUT=$(run_pyvm "$ROOT_DIR/apps/tests/peek_return_value.nyash" || true)
# echo "$OUT" | rg -q '^1$' && pass "PyVM: match return value" || fail "PyVM: match return value" "$OUT"
echo "All PyVM Stage-2 smokes PASS" >&2