DOC: fixed documented use of expression functions

- `functions<scalar>` and `functions<vector>` were erroneously
   documented in header as `lookup<scalar>` etc.

INT: handle fluent square brackets (fixes #2429)

- patch applied from openfoam.org

applications/utilities/mesh/conversion/fluent3DMeshToFoam/fluent3DMeshToFoam.L

@@ -5,7 +5,7 @@
     \\  /    A nd           | www.openfoam.com
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
-    Copyright (C) 2011-2016 OpenFOAM Foundation
+    Copyright (C) 2011-2016,2022 OpenFOAM Foundation
     Copyright (C) 2021 OpenCFD Ltd.
 -------------------------------------------------------------------------------
 License
@@ -158,6 +158,7 @@ quote                      \"
 dash                       "-"
 dotColonDash               [.:-]
 commaPipe                  [,\|]
+squareBracket              [\[\]]
 
 schemeSpecialInitial       [!$%&*/\\:;<=>?~_^#.@']
 schemeSpecialSubsequent    [.+-]
@@ -172,6 +173,7 @@ zeroLabel                  {digit}*
 signedInteger              [-+]?{integer}
 word                       ({alpha}|{digit}|{dotColonDash})*
 wordBraces                 ({word}|{lbrac}|{rbrac})*
+wordSquareBrackets         ({word}|{squareBracket})*
 wordBracesExtras           ({word}|{lbrac}|{rbrac}|{commaPipe})*
 
 exponent_part              [eE][-+]?{digit}+
@@ -193,7 +195,7 @@ scalarList                 ({scalarListElement}+{space})
 schemeSymbolList           ({schemeSymbolListElement}+{space})
 
 starStar                   ("**")
-text                       ({space}({word}*{space})*)
+text                       ({space}({wordSquareBrackets}*{space})*)
 textBraces                 ({space}({wordBraces}*{space})*)
 textExtras                 ({space}({word}*{commaPipe}{space})*)
 textBracesExtras           ({space}({wordBracesExtras}*{space})*)

src/OpenFOAM/expressions/exprDriver/exprDriver.H

@@ -6,7 +6,7 @@
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
     Copyright (C) 2010-2018 Bernhard Gschaider
-    Copyright (C) 2019-2021 OpenCFD Ltd.
+    Copyright (C) 2019-2022 OpenCFD Ltd.
 -------------------------------------------------------------------------------
 License
     This file is part of OpenFOAM.
@@ -36,8 +36,8 @@ Description
     \table
         Property     | Description                          | Required | Default
         variables    | List of variables for expressions    | no  | ()
-        lookup\<scalar\> | Dictionary of scalar Function1     | no  | {}
+        functions\<scalar\> | Dictionary of scalar Function1   | no  | {}
-        lookup\<vector\> | Dictionary of vector Function1     | no  | {}
+        functions\<vector\> | Dictionary of vector Function1   | no  | {}
         allowShadowing | Allow variables to shadow field names | no  | false
     \endtable
 
@@ -49,9 +49,10 @@ Description
         debug.parser  | Add debug for parser                | no  | false
     \endtable
 
-    The \c lookup<scalar> and \c lookup<vector> are dictionaries
+    The \c functions<scalar> and \c functions<vector> entries are
-    of Function1 definitions that can either be used to establish
+    dictionaries of Foam::Function1 definitions that can either be used
-    a time-varying quantity, to remap a field of scalar values, or both.
+    to establish a time-varying quantity, to remap a field of scalar
+    values, or both.
 
 SourceFiles
     exprDriverI.H
@@ -64,8 +65,8 @@ SourceFiles
 
 \*---------------------------------------------------------------------------*/
 
-#ifndef expressions_exprDriver_H
+#ifndef Foam_expressions_exprDriver_H
-#define expressions_exprDriver_H
+#define Foam_expressions_exprDriver_H
 
 #include "exprResult.H"
 #include "exprString.H"