Method is_function_sep

core/src/callable.rs:632–638

Returns true if `sep` is valid for a function call (only `Long` and `End` are allowed because the parser only produces comma separators for function arguments).

(sep: &ArgSepSyntax)

    /// Returns true if `sep` is valid for a function call (only `Long` and `End` are allowed because
    /// the parser only produces comma separators for function arguments).
    fn is_function_sep(sep: &ArgSepSyntax) -> bool {
        match sep {
            ArgSepSyntax::Exactly(ArgSep::Long) | ArgSepSyntax::End => true,
            ArgSepSyntax::OneOf(seps) => seps.iter().all(|s| *s == ArgSep::Long),
            _ => false,
        }
    }

    /// Checks that the syntax of a callable that returns a value only uses separators that can appear
    /// in a function call (i.e. the comma separator).  The parser only produces `ArgSep::Long` for