Merge branch 'implicit_named_connection' of https://github.com/tux3/yosys into tux3...

diff --cc frontends/verilog/verilog_parser.y
index ccdab987fe5915b8f08edb6b9fb45be761244c34,983445011a14ac7e3e5470cc6c6c890cf309def4..2fffc7536e931fffc9264abfff6eeacb14744b7d
--- 1/frontends/verilog/verilog_parser.y
--- 2/frontends/verilog/verilog_parser.y
+++ b/frontends/verilog/verilog_parser.y
@@@ -1532,31 -1532,35 +1532,40 @@@ cell_port_list_rules
        cell_port | cell_port_list_rules ',' cell_port;
  
  cell_port:
 -      /* empty */ {
 +      attr {
                AstNode *node = new AstNode(AST_ARGUMENT);
                astbuf2->children.push_back(node);
 +              free_attr($1);
        } |
 -      expr {
 +      attr expr {
                AstNode *node = new AstNode(AST_ARGUMENT);
                astbuf2->children.push_back(node);
 -              node->children.push_back($1);
 +              node->children.push_back($2);
 +              free_attr($1);
        } |
 -      named_port '(' ')' | // not connected
 -      named_port '(' expr ')' {
 -              ($1)->children.push_back($3);
 +      attr '.' TOK_ID '(' expr ')' {
 +              AstNode *node = new AstNode(AST_ARGUMENT);
 +              node->str = *$3;
 +              astbuf2->children.push_back(node);
 +              node->children.push_back($5);
 +              delete $3;
 +              free_attr($1);
        } |
 -      named_port {
 -              // SV implied port
 -              if (!sv_mode)
 -                      frontend_verilog_yyerror("Implicit .name port connection in port list (%s). This is not supported unless read_verilog is called with -sv!", $1->str.c_str());
 -              auto id_node = new AstNode(AST_IDENTIFIER);
 -              id_node->str = ($1)->str;
 -              ($1)->children.push_back(id_node);
 -      };
 -
 -named_port:
 -      '.' TOK_ID {
 +      attr '.' TOK_ID '(' ')' {
                AstNode *node = new AstNode(AST_ARGUMENT);
 -              node->str = *$2;
 -              delete $2;
 +              node->str = *$3;
 +              astbuf2->children.push_back(node);
 +              delete $3;
 +              free_attr($1);
++      } |
++      attr '.' TOK_ID {
++              AstNode *node = new AstNode(AST_ARGUMENT);
++              node->str = *$3;
+               astbuf2->children.push_back(node);
 -              $$ = node;
++              node->children.push_back(new AstNode(AST_IDENTIFIER));
++              node->children.back()->str = *$3;
++              delete $3;
++              free_attr($1);
        };
  
  always_stmt: