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Auto merge of rust-lang#11456 - tom-anders:std_instead_of_core_sugges…
…tion, r=Manishearth Add suggestions for std_instead_of_core ``` changelog: [`std_instead_of_core`]: add suggestions ``` Fixes rust-lang#11446
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,62 @@ | ||
| #![warn(clippy::std_instead_of_core)] | ||
| #![allow(unused_imports)] | ||
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| extern crate alloc; | ||
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| #[warn(clippy::std_instead_of_core)] | ||
| fn std_instead_of_core() { | ||
| // Regular import | ||
| use core::hash::Hasher; | ||
| //~^ ERROR: used import from `std` instead of `core` | ||
| // Absolute path | ||
| use ::core::hash::Hash; | ||
| //~^ ERROR: used import from `std` instead of `core` | ||
| // Don't lint on `env` macro | ||
| use std::env; | ||
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| // Multiple imports | ||
| use core::fmt::{Debug, Result}; | ||
| //~^ ERROR: used import from `std` instead of `core` | ||
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| // Function calls | ||
| let ptr = core::ptr::null::<u32>(); | ||
| //~^ ERROR: used import from `std` instead of `core` | ||
| let ptr_mut = ::core::ptr::null_mut::<usize>(); | ||
| //~^ ERROR: used import from `std` instead of `core` | ||
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| // Types | ||
| let cell = core::cell::Cell::new(8u32); | ||
| //~^ ERROR: used import from `std` instead of `core` | ||
| let cell_absolute = ::core::cell::Cell::new(8u32); | ||
| //~^ ERROR: used import from `std` instead of `core` | ||
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| let _ = std::env!("PATH"); | ||
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| // do not lint until `error_in_core` is stable | ||
| use std::error::Error; | ||
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| // lint items re-exported from private modules, `core::iter::traits::iterator::Iterator` | ||
| use core::iter::Iterator; | ||
| //~^ ERROR: used import from `std` instead of `core` | ||
| } | ||
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| #[warn(clippy::std_instead_of_alloc)] | ||
| fn std_instead_of_alloc() { | ||
| // Only lint once. | ||
| use alloc::vec; | ||
| //~^ ERROR: used import from `std` instead of `alloc` | ||
| use alloc::vec::Vec; | ||
| //~^ ERROR: used import from `std` instead of `alloc` | ||
| } | ||
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| #[warn(clippy::alloc_instead_of_core)] | ||
| fn alloc_instead_of_core() { | ||
| use core::slice::from_ref; | ||
| //~^ ERROR: used import from `alloc` instead of `core` | ||
| } | ||
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| fn main() { | ||
| std_instead_of_core(); | ||
| std_instead_of_alloc(); | ||
| alloc_instead_of_core(); | ||
| } |
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