+fn pretty_print_macro_expansion(expn: SyntaxNode, map: Option<&TokenMap>) -> String {
+ let mut res = String::new();
+ let mut prev_kind = EOF;
+ let mut indent_level = 0;
+ for token in iter::successors(expn.first_token(), |t| t.next_token()) {
+ let curr_kind = token.kind();
+ let space = match (prev_kind, curr_kind) {
+ _ if prev_kind.is_trivia() || curr_kind.is_trivia() => "",
+ (T!['{'], T!['}']) => "",
+ (T![=], _) | (_, T![=]) => " ",
+ (_, T!['{']) => " ",
+ (T![;] | T!['{'] | T!['}'], _) => "\n",
+ (_, T!['}']) => "\n",
+ (IDENT | LIFETIME_IDENT, IDENT | LIFETIME_IDENT) => " ",
+ _ if prev_kind.is_keyword() && curr_kind.is_keyword() => " ",
+ (IDENT, _) if curr_kind.is_keyword() => " ",
+ (_, IDENT) if prev_kind.is_keyword() => " ",
+ (T![>], IDENT) => " ",
+ (T![>], _) if curr_kind.is_keyword() => " ",
+ (T![->], _) | (_, T![->]) => " ",
+ (T![&&], _) | (_, T![&&]) => " ",
+ (T![,], _) => " ",
+ (T![:], IDENT | T!['(']) => " ",
+ (T![:], _) if curr_kind.is_keyword() => " ",
+ (T![fn], T!['(']) => "",
+ (T![']'], _) if curr_kind.is_keyword() => " ",
+ (T![']'], T![#]) => "\n",
+ _ if prev_kind.is_keyword() => " ",
+ _ => "",
+ };