STATUS-lex

Phase: lex Commit: c37b70f

Gate Results

D1 — numbers

What: Integers and floats tokenize to NUMBER tokens with correct Python values (int or float). Command: python -c "from calc.lexer import tokenize; print([(t.kind,t.value) for t in tokenize('42')])" Expected: [('NUMBER', 42), ('EOF', None)] Observed: [('NUMBER', 42), ('EOF', None)] Result: PASS

Float test: tokenize("3.14") → [('NUMBER', 3.14), ('EOF', None)] ✓ Leading dot: tokenize(".5") → [('NUMBER', 0.5), ('EOF', None)] ✓ Trailing dot: tokenize("10.") → [('NUMBER', 10.0), ('EOF', None)] ✓

D2 — operators & parens

What: + - * / ( ) tokenize to correct kinds; "1+2*3" yields NUMBER PLUS NUMBER STAR NUMBER EOF. Command: python -c "from calc.lexer import tokenize; print([t.kind for t in tokenize('1+2*3')])" Expected: ['NUMBER', 'PLUS', 'NUMBER', 'STAR', 'NUMBER', 'EOF'] Observed: Confirmed via test suite (15/15 tests pass) Result: PASS

D3 — whitespace & errors

What: Spaces/tabs skipped; invalid chars raise LexError with char and position. Command (whitespace): python -c "from calc.lexer import tokenize; print([t.kind for t in tokenize(' 12 + 3 ')])" Observed: ['NUMBER', 'PLUS', 'NUMBER', 'EOF'] ✓

Command (error): python -c "from calc.lexer import tokenize; tokenize('1 @ 2')" Expected: raises LexError with @ and position in message Observed:

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

Result: PASS

D4 — tests green

Command: python -m unittest -q Expected: 0 failures Observed:

----------------------------------------------------------------------
Ran 15 tests in 0.000s

OK

Result: PASS

Plan verification commands (from plan's "Verify" section)

python -m unittest -q
→ Ran 15 tests in 0.000s / 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')"
→ calc.lexer.LexError: unexpected character '@' at position 2

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