ENH: add failsafe version of Enum::get()

src/OpenFOAM/primitives/enums/Enum.C

@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     |
-    \\  /    A nd           | Copyright (C) 2017-2018 OpenCFD Ltd.
+    \\  /    A nd           | Copyright (C) 2017-2019 OpenCFD Ltd.
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -77,6 +77,24 @@ EnumType Foam::Enum<EnumType>::get(const word& enumName) const
 }
 
 
+template<class EnumType>
+EnumType Foam::Enum<EnumType>::get
+(
+    const word& enumName,
+    const EnumType defaultValue
+) const
+{
+    const label idx = find(enumName);
+
+    if (idx < 0)
+    {
+        return defaultValue;
+    }
+
+    return EnumType(vals_[idx]);
+}
+
+
 template<class EnumType>
 EnumType Foam::Enum<EnumType>::read(Istream& is) const
 {

src/OpenFOAM/primitives/enums/Enum.H

@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     |
-    \\  /    A nd           | Copyright (C) 2017-2018 OpenCFD Ltd.
+    \\  /    A nd           | Copyright (C) 2017-2019 OpenCFD Ltd.
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -130,6 +130,10 @@ public:
         //  FatalError if not found.
         EnumType get(const word& enumName) const;
 
+        //- The enumeration corresponding to the given name.
+        //  \return The enumeration or default if not found.
+        EnumType get(const word& enumName, const EnumType defaultValue) const;
+
         //- The name corresponding to the given enumeration.
         //  Return an empty word if not found.
         inline const word& get(const EnumType e) const;