From 16c6984bb97409029e213154ac4f633ae04af3d8 Mon Sep 17 00:00:00 2001
From: Yusuke Endoh <mame@ruby-lang.org>
Date: Mon, 18 Mar 2019 14:25:47 +0900
Subject: Separate keyword arguments from positional arguments

And, allow non-symbol keys as a keyword arugment
---
 vm.c | 16 ++++++----------
 1 file changed, 6 insertions(+), 10 deletions(-)

(limited to 'vm.c')

diff --git a/vm.c b/vm.c
index 157a43967e..c727554483 100644
--- a/vm.c
+++ b/vm.c
@@ -2779,6 +2779,9 @@ static VALUE core_hash_merge_kwd(VALUE hash, VALUE kw);
 static VALUE
 core_hash_merge(VALUE hash, long argc, const VALUE *argv)
 {
+    if (hash == rb_no_keyword_hash) {
+	hash = rb_hash_new();
+    }
     Check_Type(hash, T_HASH);
     VM_ASSERT(argc % 2 == 0);
     rb_hash_bulk_insert(argc, argv, hash);
@@ -2790,23 +2793,14 @@ m_core_hash_merge_ptr(int argc, VALUE *argv, VALUE recv)
 {
     VALUE hash = argv[0];
 
-    REWIND_CFP(core_hash_merge(hash, argc-1, argv+1));
+    REWIND_CFP(hash = core_hash_merge(hash, argc-1, argv+1));
 
     return hash;
 }
 
-static void
-kw_check_symbol(VALUE key)
-{
-    if (!SYMBOL_P(key)) {
-	rb_raise(rb_eTypeError, "hash key %+"PRIsVALUE" is not a Symbol",
-		 key);
-    }
-}
 static int
 kwmerge_i(VALUE key, VALUE value, VALUE hash)
 {
-    kw_check_symbol(key);
     rb_hash_aset(hash, key, value);
     return ST_CONTINUE;
 }
@@ -2821,6 +2815,8 @@ m_core_hash_merge_kwd(VALUE recv, VALUE hash, VALUE kw)
 static VALUE
 core_hash_merge_kwd(VALUE hash, VALUE kw)
 {
+    if (RHASH_EMPTY_P(hash) && kw == rb_no_keyword_hash)
+	return rb_no_keyword_hash;
     rb_hash_foreach(rb_to_hash_type(kw), kwmerge_i, hash);
     return hash;
 }
-- 
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