Parse ANSI parameters declaration

src/lexer.l

@@ -139,6 +139,7 @@ UDP_INDICATOR   "("{UDP_LEVEL}{UDP_LEVEL}")"
 SCALAR_ZERO     ('b0|'B0|1'b0|1'B0)
 SCALAR_ONE      ('b1|'B1|1'b1|1'B1)
 PAREN_STAR      "("{SPACE}*"*"{SPACE}*")"
+HASH_LPAREN     #{SPACE}*"("
 
 %x COMMENT C_COMMENT PSL VLOG UDP SDF SDF_EXPR
 
@@ -733,6 +734,7 @@ BEFORE            ?i:before
 <VLOG>{VLOG_NUMBER}      { yylval.str = xstrdup(yytext); return tNUMBER; }
 <VLOG>{VLOG_REAL}        { return parse_verilog_real(yytext); };
 <VLOG>{PAREN_STAR}       { return tPARENSTAR; }
+<VLOG>{HASH_LPAREN}      { return tHASHLPAREN; }
 
 <INITIAL,PSL>{DECIMAL}   { return parse_decimal_literal(yytext); }
 <INITIAL,PSL>{BASED}     { return parse_based_literal(yytext); }

src/scan.c

@@ -265,7 +265,7 @@ const char *token_str(token_t tok)
          "shortreal", "realtime", "`__nvc_push", "`__nvc_pop", "++", "--",
          "var", "`default_nettype", "tri", "tri0", "tri1", "wand", "triand",
          "wor", "trior", "trireg", "uwire", "none", "localparam", "always_comb",
-         "always_ff", "always_latch", "(*)",
+         "always_ff", "always_latch", "(*)", "#(",
       };
 
       if (tok >= 200 && tok - 200 < ARRAY_LEN(token_strs))

src/scan.h

@@ -441,5 +441,6 @@ void reset_sdf_parser(void);
 #define tALWAYSFF      540
 #define tALWAYSLATCH   541
 #define tPARENSTAR     542
+#define tHASHLPAREN    543
 
 #endif  // _SCAN_H

src/vlog/vlog-parse.c

@@ -3325,6 +3325,57 @@ static void p_list_of_port_declarations(vlog_node_t mod)
    consume(tRPAREN);
 }
 
+static void p_parameter_port_declaration(vlog_node_t mod, vlog_kind_t kind)
+{
+   // parameter_port_declaration ::= parameter_declaration
+   //    | local_parameter_declaration
+   //    | data_type list_of_param_assignments
+   //    | type list_of_type_assignments
+
+   BEGIN("parameter port declaration");
+
+   // TODO: Add parsing of "type" declarations example #(type T = bit)
+   vlog_node_t datatype = p_data_type_or_implicit();
+   vlog_add_decl(mod, p_param_assignment(datatype, kind));
+}
+
+static void p_parameter_port_list(vlog_node_t mod)
+{
+   // parameter_port_list ::=
+   //   | # ( parameter_port_declaration { , parameter_port_declaration } )
+   //   | #( )
+
+   BEGIN("parameter port list");
+
+   consume(tHASHLPAREN);
+
+   if (peek() != tRPAREN) {
+      vlog_kind_t kind = V_PARAM_DECL;
+
+      do {
+         switch(peek()) {
+         case tLOCALPARAM:
+            kind = V_LOCALPARAM;
+            consume(tLOCALPARAM);
+            break;
+         case tPARAMETER:
+            kind = V_PARAM_DECL;
+            consume(tPARAMETER);
+            break;
+         case tTYPE:
+            // TODO: Add parsing of "type" declarations example #(type T = bit)
+            kind = V_LAST_NODE_KIND;
+            break;
+         default:
+            break;
+         }
+         p_parameter_port_declaration(mod, kind);
+      } while(optional(tCOMMA));
+   }
+
+   consume(tRPAREN);
+}
+
 static void p_module_ansi_header(vlog_node_t mod)
 {
    // { attribute_instance } module_keyword [ lifetime ] module_identifier
@@ -3333,6 +3384,9 @@ static void p_module_ansi_header(vlog_node_t mod)
 
    EXTEND("module ANSI header");
 
+   if (peek() == tHASHLPAREN)
+      p_parameter_port_list(mod);
+
    if (peek() == tLPAREN)
       p_list_of_port_declarations(mod);
 

test/test_vlog.c

@@ -653,6 +653,28 @@ START_TEST(test_param1)
 }
 END_TEST
 
+START_TEST(test_param2)
+{
+   input_from_file(TESTDIR "/vlog/param2.v");
+
+   const error_t expect[] = {
+      {  13, "duplicate declaration" },
+      { -1, NULL }
+   };
+   expect_errors(expect);
+
+   vlog_node_t m = vlog_parse();
+   fail_if(m == NULL);
+   fail_unless(vlog_kind(m) == V_MODULE);
+
+   vlog_check(m);
+
+   fail_unless(vlog_parse() == NULL);
+
+   check_expected_errors();
+}
+END_TEST
+
 START_TEST(test_pp3)
 {
    input_from_file(TESTDIR "/vlog/pp3.v");
@@ -802,6 +824,7 @@ Suite *get_vlog_tests(void)
    tcase_add_test(tc, test_enum1);
    tcase_add_test(tc, test_union1);
    tcase_add_test(tc, test_param1);
+   tcase_add_test(tc, test_param2);
    tcase_add_test(tc, test_pp3);
    tcase_add_test(tc, test_concat1);
    tcase_add_test(tc, test_pp4);

test/vlog/param2.v

@@ -0,0 +1,14 @@
+module param2 # (
+  [7:0] p1 = 8'd5,
+  parameter p2 = 8,
+  p3 = 7,
+  localparam bit p4 = 0,
+  p5 = 5,
+  parameter p6 = 4
+) (
+  input x, y,
+  output reg z
+);
+  assign w1 = p1;   // OK
+  parameter logic p1 = 1;   // Error
+endmodule // param2