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A4-Tacks
c7ed41ebd0
I seem unable to use `Expr::needs_parens*` to complete it
Example
---
```rust
static mut STATIC_MUT: u8 = 0;
fn foo() -> u8 {
STATIC_MUT$0 * 2
}
```
**Before this PR**:
```rust
static mut STATIC_MUT: u8 = 0;
fn foo() -> u8 {
unsafe { STATIC_MUT } * 2
}
```
**After this PR**:
```rust
static mut STATIC_MUT: u8 = 0;
fn foo() -> u8 {
(unsafe { STATIC_MUT }) * 2
}
```
This directory contains some source code for the Rust project, including:
- The bootstrapping build system
- Various submodules for tools, like cargo, tidy, etc.
For more information on how various parts of the compiler work, see the rustc dev guide.