Method hasUserConstructor

src/ast/ast.cpp:299–314

True if this structure has any non-generated ctor method (Klass`Klass). Ctor methods always live in the same module as the class (parser registers them together), so we look up by name hash via functionsByName / genericsByName. The `classParent == this` identity check defends against same-named classes in other modules bleeding in through generic instantiation.

    // The `classParent == this` identity check defends against same-named classes
    // in other modules bleeding in through generic instantiation.
    bool Structure::hasUserConstructor() const {
        if ( !module ) return false;
        string ctorName = name + "`" + name;
        uint64_t hName = hash64z(ctorName.c_str());
        if ( auto kv = module->functionsByName.find(hName) ) {
            for ( auto * fn : kv->second ) {
                if ( !fn->generated && fn->classParent == this ) return true;
            }
        }
        if ( auto kv = module->genericsByName.find(hName) ) {
            for ( auto * fn : kv->second ) {
                if ( !fn->generated && fn->classParent == this ) return true;
            }
        }
        return false;
    }

    // True if this structure has a non-generated 0-arg-callable ctor (no args, or
    // all args default-initialized). Used by the synth-derived-ctor gate to verify