From 4adb012926f8bd6011168327d8832cf19976de40 Mon Sep 17 00:00:00 2001 From: Jeremy Evans Date: Thu, 18 Nov 2021 12:44:19 -0800 Subject: Anonymous block forwarding allows a method to forward a passed block to another method without having to provide a name for the block parameter. Implements [Feature #11256] Co-authored-by: Yusuke Endoh mame@ruby-lang.org Co-authored-by: Nobuyoshi Nakada nobu@ruby-lang.org --- parse.y | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) (limited to 'parse.y') diff --git a/parse.y b/parse.y index 8bfb7f2757..b6498651bf 100644 --- a/parse.y +++ b/parse.y @@ -427,6 +427,8 @@ static void token_info_drop(struct parser_params *p, const char *token, rb_code_ #define lambda_beginning_p() (p->lex.lpar_beg == p->lex.paren_nest) +#define ANON_BLOCK_ID '&' + static enum yytokentype yylex(YYSTYPE*, YYLTYPE*, struct parser_params*); #ifndef RIPPER @@ -2846,6 +2848,17 @@ block_arg : tAMPER arg_value /*% %*/ /*% ripper: $2 %*/ } + | tAMPER + { + /*%%%*/ + if (!local_id(p, ANON_BLOCK_ID)) { + compile_error(p, "no anonymous block parameter"); + } + $$ = NEW_BLOCK_PASS(NEW_LVAR(ANON_BLOCK_ID, &@1), &@$); + /*% + $$ = Qnil; + %*/ + } ; opt_block_arg : ',' block_arg @@ -5541,6 +5554,14 @@ f_block_arg : blkarg_mark tIDENTIFIER /*% %*/ /*% ripper: blockarg!($2) %*/ } + | blkarg_mark + { + /*%%%*/ + arg_var(p, shadowing_lvar(p, get_id(ANON_BLOCK_ID))); + /*% + $$ = dispatch1(blockarg, Qnil); + %*/ + } ; opt_f_block_arg : ',' f_block_arg -- cgit v1.2.3