-The left-hand side of an assignment operator must be a place expression. A
-place expression represents a memory location and can be a variable (with
-optional namespacing), a dereference, an indexing expression or a field
-reference.
+An assignment operator was used on a non-place expression.
-More details can be found in the [Expressions] section of the Reference.
-
-[Expressions]: https://doc.rust-lang.org/reference/expressions.html#places-rvalues-and-temporaries
-
-Now, we can go further. Here are some erroneous code examples:
+Erroneous code examples:
```compile_fail,E0070
struct SomeStruct {
x: i32,
- y: i32
+ y: i32,
}
-const SOME_CONST : i32 = 12;
+const SOME_CONST: i32 = 12;
fn some_other_func() {}
fn some_function() {
- SOME_CONST = 14; // error : a constant value cannot be changed!
- 1 = 3; // error : 1 isn't a valid place!
- some_other_func() = 4; // error : we cannot assign value to a function!
- SomeStruct.x = 12; // error : SomeStruct a structure name but it is used
- // like a variable!
+ SOME_CONST = 14; // error: a constant value cannot be changed!
+ 1 = 3; // error: 1 isn't a valid place!
+ some_other_func() = 4; // error: we cannot assign value to a function!
+ SomeStruct::x = 12; // error: SomeStruct a structure name but it is used
+ // like a variable!
}
```
+The left-hand side of an assignment operator must be a place expression. A
+place expression represents a memory location and can be a variable (with
+optional namespacing), a dereference, an indexing expression or a field
+reference.
+
+More details can be found in the [Expressions] section of the Reference.
+
+[Expressions]: https://doc.rust-lang.org/reference/expressions.html#places-rvalues-and-temporaries
+
And now let's give working examples:
```
struct SomeStruct {
x: i32,
- y: i32
+ y: i32,
}
-let mut s = SomeStruct {x: 0, y: 0};
+let mut s = SomeStruct { x: 0, y: 0 };
s.x = 3; // that's good !