Parser

C2PO uses SLY lexers/parsers for all front-end formats.

Current parser entry points:

• c2po/parse_c2po.py: native C2PO language (.c2po)

• c2po/parse_mltl.py: MLTL standard input (.mltl)

• c2po/parse_equiv.py: equivalence input format (.equiv)

Each parser is exposed as a command (parse_c2po, parse_mltl, parse_equiv) that returns a cpt.Program and updates relevant fields in cpt.Context (for example signal mappings, symbolic bounds/constraints in .equiv, and source filename metadata).

Parsing focuses on syntax construction. Most semantic validation and type enforcement are deferred to type_check.