Merge pull request #993 from ithinuel/escape-in-attribute

add double quote escapes from pragma comments.

ivlpp/lexor.lex

@@ -268,6 +268,7 @@ keywords (line|include|define|undef|ifdef|ifndef|else|elsif|endif)
 <PCOMENT>`[a-zA-Z][a-zA-Z0-9_$]* {
     if (macro_needs_args(yytext+1)) yy_push_state(MA_START); else do_expand(0);
 }
+<PCOMENT>`\"     { fputc('\"', yyout); }
 
  /* Strings do not contain preprocessor directives or macro expansions.
   */

ivtest/ivltests/attrib_expr.v

@@ -74,6 +74,10 @@ endfunction
 
 (* attr = fn(10) *)     reg attr46;
 
+// Macro escaped
+`define A_MACRO(arg) (* attr = `"arg`" *)
+         `A_MACRO(test) reg attr47;
+
 initial begin
   $display("PASSED");
 end