add parsing rule, function integer ID

Author: JaewonHur

pyverilog/vparser/parser.py

@@ -2058,6 +2058,15 @@ def p_function_nowidth(self, p):
                         p[4], lineno=p.lineno(1))
         p.set_lineno(0, p.lineno(1))
 
+    def p_function_integer(self, p):
+        'function : FUNCTION INTEGER ID SEMICOLON function_statement ENDFUNCTION'
+        p[0] = Function(p[3],
+                        Width(IntConst('31', lineno=p.lineno(1)),
+                              IntConst('0', lineno=p.lineno(1)),
+                              lineno=p.lineno(1)),
+                        p[5], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
     def p_function_statement(self, p):
         'function_statement : funcvardecls function_calc'
         p[0] = p[1] + (p[2],)