Function with_file_parser 

pub fn with_file_parser<T>(
    fm: &SourceFile,
    syntax: Syntax,
    target: EsVersion,
    comments: Option<&dyn Comments>,
    recovered_errors: &mut Vec<Error>,
    op: impl for<'aa> FnOnce(&mut Parser<Lexer<'_>>) -> Result<T, Error>,
) -> Result<T, Error>

Available on crate features __ecma and __parser only.