Function jj_cli::template_parser::expect_string_literal_with

pub fn expect_string_literal_with<'a, 'i, T>(
    node: &'a ExpressionNode<'i>,
    f: impl FnOnce(&'a str, Span<'i>) -> TemplateParseResult<T>
) -> TemplateParseResult<T>

Applies the given function if the node is a string literal.