// A type-returning FUNCTION head (`Make(s64)` where `Make :: ($T) -> Type`) is
// NON-transitive AND ambiguity-checked, exactly like the parameterized generic-
// struct / protocol heads (0767) and the nominal leaf (0755). `main` flat-imports
// two modules that each author a same-name `Make` type-fn with a different body
// and authors none itself, so the bare `Make(s64)` head is a genuine collision —
// it must emit the LOUD "type 'Make' is ambiguous" diagnostic and poison, NEVER
// silently instantiate whichever single author `fn_ast_map` happens to hold.
//
// Regression (Phase E4 attempt-6, finding #2): before `headFnLeak` did bare-call
// ambiguity selection it only checked `isNameVisible` (both authors ARE visible),
// so two flat `Make` type-fns silently instantiated one author — `size_of(Make(s64))`
// printed 16 (a.sx's two-field body) at exit 0 instead of the ambiguity diagnostic.

#import "modules/std.sx";
#import "0769-modules-ambiguous-type-fn-head/a.sx";
#import "0769-modules-ambiguous-type-fn-head/b.sx";

main :: () -> s32 {
    print("size={}\n", size_of(Make(s64)));
    0
}