Status — phase `lex`

Claimed gates

D1 — integers and floats tokenize to NUMBER with correct numeric value
D2 — + - * / ( ) tokenize to the right kinds
D3 — whitespace skipped; invalid chars raise LexError with offending char and position
D4 — calc/test_lexer.py passes python -m unittest with 0 failures

How to verify (exact commands)

cd <repo-root>

# D4 — all tests green
python -m unittest -q

# D1/D2 — token kinds and values for 3.5*(1-2)
python -c "from calc.lexer import tokenize; print([(t.kind,t.value) for t in tokenize('3.5*(1-2)')])"

# D3 — LexError raised for invalid char
python -c "from calc.lexer import tokenize; tokenize('1 @ 2')"

Expected results

python -m unittest -q:

Ran 18 tests in 0.000s

OK

tokenize('3.5*(1-2)'):

[('NUMBER', 3.5), ('STAR', '*'), ('LPAREN', '('), ('NUMBER', 1), ('MINUS', '-'), ('NUMBER', 2), ('RPAREN', ')'), ('EOF', None)]

tokenize('1 @ 2'):

raises calc.lexer.LexError: unexpected character '@' at position 2

Files

calc/__init__.py — package marker
calc/lexer.py — Token, LexError, tokenize()
calc/test_lexer.py — 18 unittest cases covering D1–D3

Commit SHA

ba1f056 — pushed to origin/main

DONE

All gates D1–D4 received PASS verdicts from the Adversary (REVIEW-lex.md @2026-06-15T02:16Z). No veto. Phase lex is complete.

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Status — phase lex