{"ast_node_type":"function","tokens":[{"end":78,"kind":"keyword","start":0,"text":"pub"}]}
            pub fn ptr_offset_from<T>(ptr: *const T, base: *const T) -> isize;
        extern "rust-intrinsic" {
            pub fn ptr_offset_from_unsigned<T>(ptr: *const T, base: *const T) -> usize;