451 B
451 B
Decisions (append-only)
lex phase
Token.value type for operators: stored as the literal character string (e.g. '+'). Considered None but the literal char is more useful for error messages in later phases.
Number parsing: greedy scan of [0-9.] then classify by presence of .. A string like 1.2.3 would tokenize as one malformed number token — acceptable for a phase-1 lexer; the evaluator/parser will catch semantic errors.