Function declaration

Function definition is started with the func keyword optionally followed by an identifier, and a list of arguments enclosed in parenthesis. If the function returns a value it must specify the type of that value by adding -> <type> after the argument list.

• The identifier is required if the function definition is a statement.
• The identifier is not allowed if the function definition is in an expression.

Positional and keyword arguments are supported in the argument list. Positional arguments must come first. Keyword arguments are specified by adding a colon (:) to the end of the argument followed by an optional default value. All arguments must specify their type by following the argument name with a type specifier.

Function definition is ended with the endfunc keyword.

Examples:

func a() -> int
    return 1
endfunc

func b(arg1 int) -> int
    return arg1
endfunc

func c(arg1 int, kw str:, kw_with_default str: 'default')
    message(arg1)
    message(kw)
    message(kw_with_default)
endfunc

d = func()
    message('hello from an anonymous function!')
endfunc