[rustc.git] / src / librustc_error_codes / error_codes / E0137.md

More than one function was declared with the `#[main]` attribute.

Erroneous code example:

```compile_fail,E0137
#![feature(main)]

#[main]
fn foo() {}

#[main]
fn f() {} // error: multiple functions with a `#[main]` attribute
```

This error indicates that the compiler found multiple functions with the
`#[main]` attribute. This is an error because there must be a unique entry
point into a Rust program. Example:

```
#![feature(main)]

#[main]
fn f() {} // ok!
```
Commit	Line	Data
60c5eb7d XL	1	More than one function was declared with the `#[main]` attribute.
	2
	3	Erroneous code example:
	4
	5	```compile_fail,E0137
	6	#![feature(main)]
	7
	8	#[main]
	9	fn foo() {}
	10
	11	#[main]
	12	fn f() {} // error: multiple functions with a `#[main]` attribute
	13	```
	14
	15	This error indicates that the compiler found multiple functions with the
	16	`#[main]` attribute. This is an error because there must be a unique entry
	17	point into a Rust program. Example:
	18
	19	```
	20	#![feature(main)]
	21
	22	#[main]
	23	fn f() {} // ok!
	24	```