* hash-map.h, hash-table.h: Make copy constructors explicit.

From-SVN: r231658

gcc/ChangeLog

+2015-12-15  Jason Merrill  <jason@redhat.com>
+
+	* hash-map.h, hash-table.h: Make copy constructors explicit.
+
 2015-12-15  Ilya Verbin  <ilya.verbin@intel.com>
 
 	* cgraphunit.c (output_in_order): Do not assemble "omp declare target

gcc/hash-map.h

@@ -111,8 +111,9 @@ public:
 		     CXX_MEM_STAT_INFO)
     : m_table (n, ggc, gather_mem_stats, HASH_MAP_ORIGIN PASS_MEM_STAT) {}
 
-  hash_map (const hash_map &h, bool ggc = false,
-	    bool gather_mem_stats = GATHER_STATISTICS CXX_MEM_STAT_INFO)
+  explicit hash_map (const hash_map &h, bool ggc = false,
+		     bool gather_mem_stats = GATHER_STATISTICS
+		     CXX_MEM_STAT_INFO)
     : m_table (h.m_table, ggc, gather_mem_stats,
 	       HASH_MAP_ORIGIN PASS_MEM_STAT) {}
 

gcc/hash-table.h

@@ -365,10 +365,10 @@ public:
 		       bool gather_mem_stats = GATHER_STATISTICS,
 		       mem_alloc_origin origin = HASH_TABLE_ORIGIN
 		       CXX_MEM_STAT_INFO);
-  hash_table (const hash_table &, bool ggc = false,
-	      bool gather_mem_stats = GATHER_STATISTICS,
-	      mem_alloc_origin origin = HASH_TABLE_ORIGIN
-	      CXX_MEM_STAT_INFO);
+  explicit hash_table (const hash_table &, bool ggc = false,
+		       bool gather_mem_stats = GATHER_STATISTICS,
+		       mem_alloc_origin origin = HASH_TABLE_ORIGIN
+		       CXX_MEM_STAT_INFO);
   ~hash_table ();
 
   /* Create a hash_table in gc memory.  */