agent-orchestrator-benchmark/calculators/builder-solo/run-04/machine-docs/JOURNAL-parse.md

JOURNAL-parse

Session 1

Built calc/parser.py — recursive-descent parser with grammar:

• expr → term (('+' | '-') term)*
• term → unary (('*' | '/') unary)*
• unary → '-' unary | primary
• primary → NUMBER | '(' expr ')'

Left associativity achieved via iterative loops (not recursion) in expr and term. Unary minus handled in its own unary rule, which recurses right.

Built calc/test_parser.py with 19 tests (35 total including lex tests) covering D1–D5.

All DoD gates passed on first run.