Fix +1364-1995ext flags applying too late, bug1384.

Changes

@@ -18,6 +18,8 @@ The contributors that suggested a given feature are shown in []. Thanks!
 
 ****  Fix maintainer test when no Parallel::Forker, msg2630. [Enzo Chi]
 
+****  Fix +1364-1995ext flags applying too late, bug1384. [Al Grant]
+
 
 * Verilator 4.010 2019-01-27
 

src/V3FileLine.h

@@ -91,6 +91,7 @@ protected:
     friend class V3ParseImp;
     friend class V3PreLex;
     friend class V3PreProcImp;
+    friend class V3PreShellImp;
     void lineno(int num) { m_lineno = num; }
     void language(V3LangCode lang) { singleton().numberToLang(m_filenameno, lang); }
     void filename(const string& name) { m_filenameno = singleton().nameToNumber(name); }

src/V3ParseImp.cpp

@@ -115,17 +115,6 @@ void V3ParseImp::parseFile(FileLine* fileline, const string& modfilename, bool i
     m_fileline = new FileLine(fileline);
     m_inLibrary = inLibrary;
 
-    // Set language standard up front
-    if (!v3Global.opt.preprocOnly()) {
-	// Leting lex parse this saves us from having to specially en/decode
-	// from the V3LangCode to the various Lex BEGIN states. The language
-	// of this source file is updated here, in case there have been any
-	// intervening +<lang>ext+ options since it was first ecountered.
-        FileLine *modfileline = new FileLine(modfilename, 0);
-	modfileline->language(v3Global.opt.fileLanguage(modfilename));
-        ppPushText(string("`begin_keywords \"")+modfileline->language().ascii()+"\"\n");
-    }
-
     // Preprocess into m_ppBuffer
     bool ok = V3PreShell::preproc(fileline, modfilename, m_filterp, this, errmsg);
     if (!ok) {

src/V3PreShell.cpp

@@ -102,8 +102,20 @@ protected:
 
 	// Preprocess
 	s_filterp = filterp;
-	bool ok = preprocOpen(fl, s_filterp, modname, "", errmsg);
-	if (!ok) return false;
+	string modfilename = preprocOpen(fl, s_filterp, modname, "", errmsg);
+	if (modfilename.empty()) return false;
+
+	// Set language standard up front
+	if (!v3Global.opt.preprocOnly()) {
+	    // Leting lex parse this saves us from having to specially en/decode
+	    // from the V3LangCode to the various Lex BEGIN states. The language
+	    // of this source file is updated here, in case there have been any
+	    // intervening +<lang>ext+ options since it was first ecountered.
+	    FileLine* modfileline = new FileLine(modfilename, 0);
+	    modfileline->language(v3Global.opt.fileLanguage(modfilename));
+	    V3Parse::ppPushText(parsep, (string("`begin_keywords \"")
+					 +modfileline->language().ascii()+"\"\n"));
+	}
 
 	while (!s_preprocp->isEof()) {
 	    string line = s_preprocp->getline();
@@ -116,12 +128,15 @@ protected:
 	if (modname[0]=='/' || modname[0]=='\\') {
 	    fl->v3warn(INCABSPATH,"Suggest `include with absolute path be made relative, and use +include: "<<modname);
 	}
-	preprocOpen(fl, s_filterp, modname, V3Os::filenameDir(fl->filename()), "Cannot find include file: ");
+	preprocOpen(fl, s_filterp, modname, V3Os::filenameDir(fl->filename()),
+		    "Cannot find include file: ");
     }
 
-    bool preprocOpen(FileLine* fl, V3InFilter* filterp, const string& modname, const string& lastpath,
-                     const string& errmsg) {  // Error message or "" to suppress
-	// Returns true if successful
+private:
+    string preprocOpen(FileLine* fl, V3InFilter* filterp,
+                       const string& modname, const string& lastpath,
+                       const string& errmsg) {  // Error message or "" to suppress
+	// Returns filename if successful
 	// Try a pure name in case user has a bogus `filename they don't expect
         string filename = v3Global.opt.filePath(fl, modname, lastpath, errmsg);
 	if (filename=="") {
@@ -131,13 +146,14 @@ protected:
 
             filename = v3Global.opt.filePath(fl, ppmodname, lastpath, errmsg);
 	}
-	if (filename=="") return false;  // Not found
+	if (filename=="") return "";  // Not found
 
 	UINFO(2,"    Reading "<<filename<<endl);
 	s_preprocp->openFile(fl, filterp, filename);
-	return true;
+	return filename;
     }
 
+public:
     // CONSTRUCTORS
     V3PreShellImp() {}
     ~V3PreShellImp() {}

test_regress/t/t_langext_order.pl

@@ -0,0 +1,18 @@
+#!/usr/bin/perl
+if (!$::Driver) { use FindBin; exec("$FindBin::Bin/bootstrap.pl", @ARGV, $0); die; }
+# DESCRIPTION: Verilator: Verilog Test driver/expect definition
+#
+# Copyright 2003 by Wilson Snyder. This program is free software; you can
+# redistribute it and/or modify it under the terms of either the GNU
+# Lesser General Public License Version 3 or the Perl Artistic License
+# Version 2.0.
+
+scenarios(simulator => 1);
+
+# This is a compile only test.
+compile(
+    v_flags2 => ["+1364-2005ext+v"],
+    );
+
+ok(1);
+1;

test_regress/t/t_langext_order.v

@@ -0,0 +1,12 @@
+// DESCRIPTION: Verilator: Verilog Test module
+//
+// A test of the +verilog2001ext+ and +verilog2005ext+ flags.
+//
+// This file ONLY is placed into the Public Domain, for any use,
+// without warranty, 2019 by Wilson Snyder.
+
+// verilator lint_off SYMRSVDWORD
+
+module t(input do);
+   t_langext_order_sub sub (.do(do));
+endmodule

test_regress/t/t_langext_order_sub.v

@@ -0,0 +1,11 @@
+// DESCRIPTION: Verilator: Verilog Test module
+//
+// A test of the +verilog2001ext+ and +verilog2005ext+ flags.
+//
+// This file ONLY is placed into the Public Domain, for any use,
+// without warranty, 2019 by Wilson Snyder.
+
+// verilator lint_off SYMRSVDWORD
+
+module t_langext_order_sub(input do);
+endmodule