Go naming conventions for const

I'm trying to determine whether there is a naming convention for the names of const in Golang.

I personally would tend to follow the C style and write them in upper case, but I haven't found anything on this page http://golang.org/doc/effective_go.html which seems to list some naming conventions for the language.

The standard library uses camel-case, so I advise you do that as well. The first letter is uppercase or lowercase depending on whether you want to export the constant.

A few examples:

• md5.BlockSize
• os.O_RDONLY is an exception because it was borrowed directly from POSIX.
• os.PathSeparator

> Go Code Review Comments
>
> This page collects common comments made during reviews of Go code, so
> that a single detailed explanation can be referred to by shorthands.
> This is a laundry list of common mistakes, not a style guide.
>
> You can view this as a supplement to
> http://golang.org/doc/effective_go.html.
>
> Mixed Caps
>
> See http://golang.org/doc/effective_go.html#mixed-caps. This applies
> even when it breaks conventions in other languages. For example an
> unexported constant is maxLength not MaxLength or MAX_LENGTH.
>

> Effective Go
>
> MixedCaps
>
> Finally, the convention in Go is to use MixedCaps or mixedCaps rather
> than underscores to write multiword names.
>

> The Go Programming Language Specification
>
> Exported identifiers
>
> An identifier may be exported to permit access to it from another
> package. An identifier is exported if both:
>
> * the first character of the identifier's name is a Unicode upper case letter (Unicode class "Lu"); and
>
> * the identifier is declared in the package block or it is a field name or method name.
>
> All other identifiers are not exported.

Use mixed caps.

Specific examples. Note that declaring the type in the constant (when relevant) can be helpful to the compiler.

// Only visible to the local file
const localFileConstant string = "Constant Value with limited scope"

// Exportable constant
const GlobalConstant string = "Everyone can use this"