Function cbm_lang_module_is_dir

internal/cbm/helpers.c:1460–1462

True when a language derives its module from the CONTAINING DIRECTORY (Java package, Go package) rather than baking the filename stem into the module QN. For these languages a sibling file in the same dir shares the module, and the type/method name is appended once — so a class `Outer` in `Outer.java` is `proj.Outer`, not `proj.Outer.Outer`, and a method in `myapp/db/conn.go` belongs to module `pr

// `proj.Outer`, not `proj.Outer.Outer`, and a method in `myapp/db/conn.go`
// belongs to module `proj.myapp.db`, not `proj.myapp.db.conn`.
static bool cbm_lang_module_is_dir(CBMLanguage lang) {
    return lang == CBM_LANG_JAVA || lang == CBM_LANG_GO;
}

char *cbm_fqn_module_source_lang(CBMArena *a, const char *project, const char *rel_path,
                                 CBMLanguage lang) {