From 6c0cc67bb22435d3c8233777258fe917f72c842a Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Wed, 2 Mar 2005 03:21:31 +0000
Subject: * eval.c (rb_eval): [EXPERIMENTAL] NODE_LAMBDA implemented.  
 [ruby-dev:25780]

* node.h (NODE_LAMBDA): for literal Proc object.

* parse.y (expr): interpret mere do...end block as proc object.

* parse.y (primary): ditto, for brace block.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@8044 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 ChangeLog | 11 +++++++++++
 eval.c    |  5 +++++
 node.h    |  2 ++
 parse.y   | 37 ++++++++++++++++++++++++++++++++++---
 4 files changed, 52 insertions(+), 3 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index d9ae088866..056a4506e3 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,14 @@
+Wed Mar  2 12:21:18 2005  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* eval.c (rb_eval): [EXPERIMENTAL] NODE_LAMBDA implemented.
+	  [ruby-dev:25780]
+
+	* node.h (NODE_LAMBDA): for literal Proc object.
+
+	* parse.y (expr): interpret mere do...end block as proc object.
+
+	* parse.y (primary): ditto, for brace block.
+
 Tue Mar  1 21:16:54 2005  K.Kosako <sndgk393 AT ybb.ne.jp>
 
 	* regcomp.c (optimize_node_left): uninitialized member
diff --git a/eval.c b/eval.c
index 860ec0ab12..fae1ffce7d 100644
--- a/eval.c
+++ b/eval.c
@@ -2941,6 +2941,7 @@ rb_eval(self, n)
 
       case NODE_ITER:
       case NODE_FOR:
+      case NODE_LAMBDA:
 	{
 	    PUSH_TAG(PROT_LOOP);
 	    PUSH_BLOCK(node->nd_var, node->nd_body);
@@ -2952,6 +2953,10 @@ rb_eval(self, n)
 		if (nd_type(node) == NODE_ITER) {
 		    result = rb_eval(self, node->nd_iter);
 		}
+		else if (nd_type(node) == NODE_LAMBDA) {
+		    ruby_iter->iter = ruby_frame->iter = ITER_CUR;
+		    result = rb_block_proc();
+		}
 		else {
 		    VALUE recv;
 
diff --git a/node.h b/node.h
index 13b0279f3e..6a0bb09e12 100644
--- a/node.h
+++ b/node.h
@@ -125,6 +125,7 @@ enum node_type {
     NODE_DSYM,
     NODE_ATTRASGN,
     NODE_PRELUDE,
+    NODE_LAMBDA,
     NODE_LAST
 };
 
@@ -340,6 +341,7 @@ typedef struct RNode {
 #define NEW_BMETHOD(b) NEW_NODE(NODE_BMETHOD,0,0,b)
 #define NEW_ATTRASGN(r,m,a) NEW_NODE(NODE_ATTRASGN,r,m,a)
 #define NEW_PRELUDE(p,b) NEW_NODE(NODE_PRELUDE,p,b,0)
+#define NEW_LAMBDA(v,b) NEW_NODE(NODE_LAMBDA,v,b,0)
 
 #define NOEX_PUBLIC    0
 #define NOEX_NOSUPER   1
diff --git a/parse.y b/parse.y
index 3606060e1c..ac1668f7e5 100644
--- a/parse.y
+++ b/parse.y
@@ -489,7 +489,7 @@ static void ripper_compile_error _((struct parser_params*, const char *fmt, ...)
 %type <node> mrhs superclass block_call block_command
 %type <node> f_arglist f_args f_optarg f_opt f_block_arg opt_f_block_arg
 %type <node> assoc_list assocs assoc undef_list backref string_dvar
-%type <node> for_var block_var opt_block_var block_par
+%type <node> for_var block_var opt_block_var block_var_def block_par
 %type <node> brace_block cmd_brace_block do_block lhs none fitem
 %type <node> mlhs mlhs_head mlhs_basic mlhs_entry mlhs_item mlhs_node
 %type <id>   fsym variable sym symbol operation operation2 operation3
@@ -1014,6 +1014,11 @@ expr		: command_call
 		    	$$ = dispatch2(unary, ID2SYM('!'), $2);
 		    %*/
 		    }
+		| do_block
+		    {
+			$$ = $1;
+			nd_set_type($$, NODE_LAMBDA);
+		    }
 		| arg
 		;
 
@@ -2504,6 +2509,26 @@ primary		: literal
 			$$ = dispatch1(hash, escape_Qundef($2));
 		    %*/
 		    }
+		| tLBRACE
+		    {
+		    /*%%%*/
+			$<vars>$ = dyna_push();
+			$<num>1 = ruby_sourceline;
+		    /*%
+		    %*/
+		    }
+		  block_var_def {$<vars>$ = ruby_dyna_vars;}
+		  compstmt
+		  '}'
+		    {
+		    /*%%%*/
+			$$ = NEW_LAMBDA($3, dyna_init($5, $<vars>4));
+			nd_set_line($$, $<num>1);
+			dyna_pop($<vars>2);
+		    /*%
+			$$ = dispatch2(brace_block, escape_Qundef($3), $5);
+		    %*/
+		    }
 		| kRETURN
 		    {
 		    /*%%%*/
@@ -3062,7 +3087,13 @@ block_var	: block_par
 		;
 
 opt_block_var	: none
-		| '|' /* none */ '|'
+		| block_var_def
+		    {
+			$$ = $1;
+		    }
+		;
+
+block_var_def	: '|' /* none */ '|'
 		    {
 		    /*%%%*/
 			$$ = (NODE*)1;
@@ -6380,7 +6411,7 @@ parser_yylex(parser)
 			if (COND_P()) return kDO_COND;
 			if (CMDARG_P() && state != EXPR_CMDARG)
 			    return kDO_BLOCK;
-			if (state == EXPR_ENDARG)
+			if (state == EXPR_ENDARG || state == EXPR_BEG)
 			    return kDO_BLOCK;
 			return kDO;
 		    }
-- 
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