Revert "Revert PRs #2203 and #2244."

This reverts commit 9c120b89ac.

frontends/verilog/verilog_parser.y

@@ -747,7 +747,7 @@ module_body:
 module_body_stmt:
 	task_func_decl | specify_block | param_decl | localparam_decl | typedef_decl | defparam_decl | specparam_declaration | wire_decl | assign_stmt | cell_stmt |
 	enum_decl | struct_decl |
-	always_stmt | TOK_GENERATE module_gen_body TOK_ENDGENERATE | defattr | assert_property | checker_decl | ignored_specify_block;
+	always_stmt | TOK_GENERATE module_gen_body TOK_ENDGENERATE | defattr | assert_property | checker_decl | ignored_specify_block | /* empty statement */ ';';
 
 checker_decl:
 	TOK_CHECKER TOK_ID ';' {
@@ -1331,36 +1331,45 @@ ignspec_id:
 param_signed:
 	TOK_SIGNED {
 		astbuf1->is_signed = true;
+	} | TOK_UNSIGNED {
+		astbuf1->is_signed = false;
 	} | /* empty */;
 
 param_integer:
 	TOK_INTEGER {
-		if (astbuf1->children.size() != 1)
-			frontend_verilog_yyerror("Internal error in param_integer - should not happen?");
 		astbuf1->children.push_back(new AstNode(AST_RANGE));
 		astbuf1->children.back()->children.push_back(AstNode::mkconst_int(31, true));
 		astbuf1->children.back()->children.push_back(AstNode::mkconst_int(0, true));
 		astbuf1->is_signed = true;
-	} | /* empty */;
+	}
 
 param_real:
 	TOK_REAL {
-		if (astbuf1->children.size() != 1)
-			frontend_verilog_yyerror("Parameter already declared as integer, cannot set to real.");
 		astbuf1->children.push_back(new AstNode(AST_REALVALUE));
-	} | /* empty */;
+	}
+
+param_logic:
+	TOK_LOGIC {
+		// SV LRM 6.11, Table 6-8: logic -- 4-state, user-defined vector size, unsigned
+		astbuf1->is_signed = false;
+		astbuf1->is_logic = true;
+	}
 
 param_range:
 	range {
 		if ($1 != NULL) {
-			if (astbuf1->children.size() != 1)
-				frontend_verilog_yyerror("integer/real parameters should not have a range.");
 			astbuf1->children.push_back($1);
 		}
 	};
 
+param_integer_type: param_integer param_signed
+param_range_type: type_vec param_signed param_range
+param_implicit_type: param_signed param_range
+
+param_integer_vector_type: param_logic param_signed param_range
+
 param_type:
-	param_signed param_integer param_real param_range |
+	param_integer_type | param_integer_vector_type | param_real | param_range_type | param_implicit_type |
 	hierarchical_type_id {
 		astbuf1->is_custom_type = true;
 		astbuf1->children.push_back(new AstNode(AST_WIRETYPE));

tests/various/integer_range_bad_syntax.ys

@@ -0,0 +1,6 @@
+logger -expect error "syntax error, unexpected" 1
+read_verilog -sv <<EOT
+module test_integer_range();
+parameter integer [31:0] a = 0;
+endmodule
+EOT

tests/various/integer_real_bad_syntax.ys

@@ -0,0 +1,6 @@
+logger -expect error "syntax error, unexpected TOK_REAL" 1
+read_verilog -sv <<EOT
+module test_integer_real();
+parameter integer real a = 0;
+endmodule
+EOT

tests/various/logic_param_simple.ys

@@ -0,0 +1,9 @@
+read_verilog -sv <<EOT
+module test_logic_param();
+parameter logic                 a = 0;
+parameter logic [31:0]          e = 0;
+parameter logic signed          b = 0;
+parameter logic unsigned        c = 0;
+parameter logic unsigned [31:0] d = 0;
+endmodule
+EOT

tests/various/signed.ys

@@ -0,0 +1,28 @@
+# SV LRM A2.2.1
+
+read_verilog -sv <<EOT
+module test_signed();
+parameter integer signed  a = 0;
+parameter integer unsigned  b = 0;
+
+endmodule
+EOT
+
+design -reset
+read_verilog -sv <<EOT
+module test_signed();
+parameter logic signed [7:0] a = 0;
+parameter logic unsigned [7:0] b = 0;
+
+endmodule
+EOT
+
+design -reset
+logger -expect error "syntax error, unexpected TOK_INTEGER" 1
+read_verilog -sv <<EOT
+module test_signed();
+parameter signed integer a = 0;
+parameter unsigned integer b = 0;
+
+endmodule
+EOT