Function proc_macro_util::parse_identifier_array

pub fn parse_identifier_array<I>(
    iter: &mut I, 
    default_span: Span, 
    allowed_values: &[&str]
) -> Result<Vec<String>, SpanError> where
    I: Iterator<Item = TokenTree>, 

Parse an array of identifiers.

It expects an array of predefined identifiers.

Arguments

• iter: token iterator to consume
• default_span: span to use when an error was found but can't be linked to a span.
• allowed_values: identifiers allowed as values for this array

Return

The identifiers found for this array.

Error

• When the tokens is not a bracket group with identifiers separated by commas
• When an identifier is not in the allowed identifier list