mame	2017-11-09 10:50:58 +0900 (Thu, 09 Nov 2017)

  New Revision: 60723

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=60723

  Log:
    node.c (dump_node): add an explanation of NODE_HASH's nd_alen
    
    The field has a flag to represent if it is a keyword argument (that has
    no braces, e.g., `foo(k:1)`) or hash literal (that has braces, e.g.,
    `foo({k:1})`).

  Modified files:
    trunk/node.c
Index: node.c
===================================================================
--- node.c	(revision 60722)
+++ node.c	(revision 60723)
@@ -585,6 +585,13 @@ dump_node(VALUE buf, VALUE indent, int c https://github.com/ruby/ruby/blob/trunk/node.c#L585
 	    ANN("format: { [nd_head] }");
 	    ANN("example: { 1 => 2, 3 => 4 }");
 	}
+	F_CUSTOM1(nd_alen, "keyword-arguments-or-hash-literal") {
+	    switch (node->nd_alen) {
+	      case 0: A("0 (keyword argument)"); break;
+	      case 1: A("1 (hash literal)"); break;
+	      default: A_ID(node->nd_alen);
+	    }
+	}
 	LAST_NODE;
 	F_NODE(nd_head, "contents");
 	return;

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