116 lines
2.5 KiB
Rust
116 lines
2.5 KiB
Rust
// Copyright 2014-2018 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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#![warn(clippy::default_trait_access)]
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use std::default::Default as D2;
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use std::string;
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use std::default;
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fn main() {
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let s1: String = Default::default();
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let s2 = String::default();
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let s3: String = D2::default();
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let s4: String = std::default::Default::default();
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let s5 = string::String::default();
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let s6: String = default::Default::default();
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let s7 = std::string::String::default();
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let s8: String = DefaultFactory::make_t_badly();
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let s9: String = DefaultFactory::make_t_nicely();
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let s10 = DerivedDefault::default();
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let s11: GenericDerivedDefault<String> = Default::default();
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let s12 = GenericDerivedDefault::<String>::default();
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let s13 = TupleDerivedDefault::default();
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let s14: TupleDerivedDefault = Default::default();
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let s15: ArrayDerivedDefault = Default::default();
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let s16 = ArrayDerivedDefault::default();
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let s17: TupleStructDerivedDefault = Default::default();
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let s18 = TupleStructDerivedDefault::default();
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let s19 = <DerivedDefault as Default>::default();
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println!(
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"[{}] [{}] [{}] [{}] [{}] [{}] [{}] [{}] [{}] [{:?}] [{:?}] [{:?}] [{:?}] [{:?}] [{:?}] [{:?}] [{:?}] [{:?}], [{:?}]",
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s1,
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s2,
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s3,
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s4,
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s5,
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s6,
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s7,
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s8,
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s9,
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s10,
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s11,
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s12,
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s13,
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s14,
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s15,
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s16,
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s17,
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s18,
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s19,
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);
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}
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struct DefaultFactory;
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impl DefaultFactory {
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pub fn make_t_badly<T: Default>() -> T {
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Default::default()
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}
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pub fn make_t_nicely<T: Default>() -> T {
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T::default()
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}
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}
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#[derive(Debug, Default)]
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struct DerivedDefault {
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pub s: String,
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}
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#[derive(Debug, Default)]
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struct GenericDerivedDefault<T: Default + std::fmt::Debug> {
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pub s: T,
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}
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#[derive(Debug, Default)]
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struct TupleDerivedDefault {
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pub s: (String, String),
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}
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#[derive(Debug, Default)]
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struct ArrayDerivedDefault {
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pub s: [String; 10],
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}
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#[derive(Debug, Default)]
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struct TupleStructDerivedDefault(String);
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