ENH: add keyType::null and wordRe::null, add match method to string classes

- provides a more uniform interface to string list operations etc

STYLE: more complete docs for keyType

src/OSspecific/POSIX/regExp.H

@@ -157,7 +157,7 @@ public:
         //  The begin-of-line (^) and end-of-line ($) anchors are implicit
         bool match(const string&, List<string>& groups) const;
 
-        //- Return true if the regex was found in within string
+        //- Return true if the regex was found within string
         bool search(const std::string& str) const
         {
             return std::string::npos != find(str);

src/OpenFOAM/Make/files

@@ -52,8 +52,8 @@ $(strings)/word/word.C
 $(strings)/word/wordIO.C
 $(strings)/fileName/fileName.C
 $(strings)/fileName/fileNameIO.C
-$(strings)/keyType/keyTypeIO.C
-$(strings)/wordRe/wordReIO.C
+$(strings)/keyType/keyType.C
+$(strings)/wordRe/wordRe.C
 
 primitives/hashes/Hasher/Hasher.C
 

src/OpenFOAM/primitives/strings/fileName/fileName.H

@@ -93,6 +93,8 @@ public:
 
         static const char* const typeName;
         static int debug;
+
+        //- An empty fileName
         static const fileName null;
 
 

src/OpenFOAM/primitives/strings/keyType/keyType.C

@@ -22,24 +22,54 @@ License
     along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
 
 Description
-    Istream constructor and IOstream operators for word.
+    Istream constructor and IOstream operators for keyType.
 
 \*---------------------------------------------------------------------------*/
 
 #include "keyType.H"
+#include "regExp.H"
 #include "IOstreams.H"
 
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
+
+const Foam::keyType Foam::keyType::null;
+
+
+// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
 Foam::keyType::keyType(Istream& is)
 :
-    word()
+    word(),
+    isPattern_(false)
 {
     is  >> *this;
 }
 
 
-Foam::Istream& Foam::operator>>(Istream& is, keyType& w)
+// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
+
+bool Foam::keyType::match
+(
+    const std::string& str,
+    bool literalMatch
+) const
+{
+    if (literalMatch || !isPattern_)
+    {
+        // check as string
+        return (str == *this);
+    }
+    else
+    {
+        // check as regex
+        return regExp(*this).match(str);
+    }
+}
+
+
+// * * * * * * * * * * * * * * * IOstream Operators  * * * * * * * * * * * * //
+
+Foam::Istream& Foam::operator>>(Istream& is, keyType& kw)
 {
     token t(is);
 
@@ -51,15 +81,16 @@ Foam::Istream& Foam::operator>>(Istream& is, keyType& w)
 
     if (t.isWord())
     {
-        w = t.wordToken();
+        kw = t.wordToken();
     }
     else if (t.isString())
     {
-        // Assign from string. Sets regular expression.
-        w = t.stringToken();
+        // Assign from string. Set as regular expression.
+        kw = t.stringToken();
+        kw.isPattern_ = true;
 
         // flag empty strings as an error
-        if (w.empty())
+        if (kw.empty())
         {
             is.setBad();
             FatalIOErrorIn("operator>>(Istream&, keyType&)", is)
@@ -86,9 +117,9 @@ Foam::Istream& Foam::operator>>(Istream& is, keyType& w)
 }
 
 
-Foam::Ostream& Foam::operator<<(Ostream& os, const keyType& w)
+Foam::Ostream& Foam::operator<<(Ostream& os, const keyType& kw)
 {
-    os.write(w);
+    os.write(kw);
     os.check("Ostream& operator<<(Ostream&, const keyType&)");
     return os;
 }

src/OpenFOAM/primitives/strings/keyType/keyType.H

@@ -32,7 +32,6 @@ Description
 
 SourceFiles
     keyType.C
-    keyTypeIO.C
 
 \*---------------------------------------------------------------------------*/
 
@@ -59,7 +58,7 @@ class keyType
 :
     public word
 {
-    // Private member data
+    // Private data
 
         //- Is the keyType a pattern (regular expression)
         bool isPattern_;
@@ -71,6 +70,11 @@ class keyType
 
 public:
 
+    // Static data members
+
+        //- An empty keyType
+        static const keyType null;
+
 
     // Constructors
 
@@ -80,19 +84,21 @@ public:
         //- Construct as copy
         inline keyType(const keyType&);
 
-        //- Construct as copy of word
+        //- Construct as copy of word. Not treated as a regular expression
         inline keyType(const word&);
 
-        //- Construct as copy of string. Expect it to be regular expression.
+        //- Construct as copy of string. Treat as regular expression.
         inline keyType(const string&);
 
-        //- Construct as copy of character array
+        //- Construct as copy of character array.
+        //  Not treated as a regular expression
         inline keyType(const char*);
 
-        //- Construct as copy of std::string
+        //- Construct as copy of std::string with specified treatment
         inline keyType(const std::string&, const bool isPattern);
 
         //- Construct from Istream
+        //  Treat as regular expression if surrounded by quotation marks.
         keyType(Istream&);
 
 
@@ -101,15 +107,24 @@ public:
         //- Should be treated as a match rather than a literal string
         inline bool isPattern() const;
 
+        //- Smart match as regular expression or as a string
+        //  Optionally force a literal match only
+        bool match(const std::string&, bool literalMatch=false) const;
+
     // Member operators
 
         // Assignment
 
+            //- Assignment operator
             inline const keyType& operator=(const keyType&);
+
+            //- Assign as word, not as non regular expression
             inline const keyType& operator=(const word&);
 
-            //- Assign from regular expression.
+            //- Assign as regular expression
             inline const keyType& operator=(const string&);
+
+            //- Assign as word, not as non regular expression
             inline const keyType& operator=(const char*);
 
 

src/OpenFOAM/primitives/strings/keyType/keyTypeI.H

@@ -23,10 +23,6 @@ License
 
 \*---------------------------------------------------------------------------*/
 
-
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
-
-
 // * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
 inline Foam::keyType::keyType()
@@ -50,7 +46,6 @@ inline Foam::keyType::keyType(const word& s)
 {}
 
 
-// Construct as copy of string. Expect it to be regular expression
 inline Foam::keyType::keyType(const string& s)
 :
     word(s, false),
@@ -58,7 +53,6 @@ inline Foam::keyType::keyType(const string& s)
 {}
 
 
-// Construct as copy of character array
 inline Foam::keyType::keyType(const char* s)
 :
     word(s, false),
@@ -66,7 +60,6 @@ inline Foam::keyType::keyType(const char* s)
 {}
 
 
-//- Construct as copy of std::string
 inline Foam::keyType::keyType
 (
     const std::string& s,

src/OpenFOAM/primitives/strings/string/string.H

@@ -82,6 +82,8 @@ public:
 
         static const char* const typeName;
         static int debug;
+
+        //- An empty string
         static const string null;
 
 
@@ -143,6 +145,9 @@ public:
         template<class String>
         static inline string quotemeta(const string&, const char quote='\\');
 
+        //- True when strings match literally
+        inline bool match(const std::string&) const;
+
         //- Avoid masking the normal std::string replace
         using std::string::replace;
 

src/OpenFOAM/primitives/strings/string/stringI.H

@@ -176,6 +176,12 @@ inline String Foam::string::validate(const string& str)
     return ss;
 }
 
+inline bool Foam::string::match(const std::string& str) const
+{
+    // check as string
+    return (str == *this);
+}
+
 
 // * * * * * * * * * * * * * * * Member Operators  * * * * * * * * * * * * * //
 

src/OpenFOAM/primitives/strings/word/word.H

@@ -73,6 +73,8 @@ public:
 
         static const char* const typeName;
         static int debug;
+
+        //- An empty word
         static const word null;
 
 

src/OpenFOAM/primitives/strings/wordRe/wordRe.C

@@ -27,7 +27,12 @@ License
 #include "IOstreams.H"
 #include "InfoProxy.H"
 
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
+
+const Foam::wordRe Foam::wordRe::null;
+
+
+// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
 Foam::wordRe::wordRe(Istream& is)
 :
@@ -38,6 +43,8 @@ Foam::wordRe::wordRe(Istream& is)
 }
 
 
+// * * * * * * * * * * * * * * * IOstream Operators  * * * * * * * * * * * * //
+
 Foam::Istream& Foam::operator>>(Istream& is, wordRe& w)
 {
     token t(is);

src/OpenFOAM/primitives/strings/wordRe/wordRe.H

@@ -44,7 +44,6 @@ Note
 
 SourceFiles
     wordRe.C
-    wordReIO.C
 
 \*---------------------------------------------------------------------------*/
 
@@ -84,6 +83,12 @@ class wordRe
 
 public:
 
+    // Static data members
+
+        //- An empty wordRe
+        static const wordRe null;
+
+
     // Public data types
 
         //- Enumeration with compile options
@@ -168,7 +173,7 @@ public:
     //- Searching
 
         //- Smart match as regular expression or as a string
-        //  Optionally specify a literal match only
+        //  Optionally force a literal match only
         inline bool match(const std::string&, bool literalMatch=false) const;
 
     //- Miscellaneous