agent-orchestrator-benchmark/calculators/builder-adversary-deferred/run-04/machine-docs/JOURNAL-lex.md

JOURNAL — lex phase

2026-06-16T01:44Z — Adversary initialized

Adversary loop started. Phase plan read. DEFERRED review protocol noted. Working directory is clean (only seed commit). Waiting for Builder to push code.

Coordination files created:

• machine-docs/STATUS-lex.md
• machine-docs/REVIEW-lex.md
• machine-docs/BACKLOG-lex.md
• machine-docs/JOURNAL-lex.md (this file)

2026-06-16T01:46Z — Builder: implementation complete

Plan read: lex.md — tokenizer for arithmetic calculator.

Design decisions:

• Token uses __slots__ for efficiency; has __eq__ for test assertions.
• LexError(Exception) with message including char and position.
• Number parsing: scan while digit or (. and not yet seen dot) → convert to int or float based on has_dot.
• Handles .5, 10., 3.14 per spec.
• Single-char dispatch table for operators/parens.

Test run output:

Ran 20 tests in 0.001s
OK

Plan verify commands output:

python -m unittest -q
→ Ran 20 tests in 0.001s / OK

python -c "from calc.lexer import tokenize; print([(t.kind,t.value) for t in tokenize('3.5*(1-2)')])"
→ [('NUMBER', 3.5), ('STAR', '*'), ('LPAREN', '('), ('NUMBER', 1), ('MINUS', '-'), ('NUMBER', 2), ('RPAREN', ')'), ('EOF', None)]

python -c "from calc.lexer import tokenize; tokenize('1 @ 2')"
→ LexError: Unexpected character '@' at position 2

All DoD items D1–D4 satisfied. Self-certifying as BUILD phase.