ENH: improvements for token methods

- direct check of punctuation.
  For example,

      while (!tok.isPunctuation(token::BEGIN_LIST)) ..

  instead of

  while (!(tok.isPunctuation() && tok.pToken() == token::BEGIN_LIST)) ..

  Using direct comparison (tok != token::BEGIN_LIST) can be fragile
  when comparing int values:

      int c = readChar(is);
      while (tok != c) ..  // Danger, uses LABEL comparison!

- direct check of word.
  For example,

      if (tok.isWord("uniform")) ..

  instead of

      if (tok.isWord() && tok.wordToken() == "uniform") ..

- make token lineNumber() a setter method

ENH: adjust internal compound method empty() -> moved()

- support named compound tokens

STYLE: setter method for stream indentation

applications/utilities/mesh/generation/foamyMesh/conformalVoronoi2DMesh/cv2DControls/cv2DControls.C

@@ -6,7 +6,7 @@
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
     Copyright (C) 2013-2015 OpenFOAM Foundation
-    Copyright (C) 2020 OpenCFD Ltd.
+    Copyright (C) 2020-2021 OpenCFD Ltd.
 -------------------------------------------------------------------------------
 License
     This file is part of OpenFOAM.
@@ -134,7 +134,7 @@ Foam::cv2DControls::cv2DControls
 
 void Foam::cv2DControls::write(Ostream& os) const
 {
-    os.indentLevel() = 1;
+    const auto oldLevel = os.indentLevel(1);
     os.precision(2);
     os.flags(ios_base::scientific);
 
@@ -148,6 +148,8 @@ void Foam::cv2DControls::write(Ostream& os) const
        << indent << "ppDist_               : " << ppDist_ << nl
        << indent << "minEdgeLen2_          : " << minEdgeLen2_ << nl
        << token::END_BLOCK << endl;
+
+    os.indentLevel(oldLevel);
 }