negEntry: Supporting negation of already negative quantities

2018-12-18 11:51:45 +00:00
parent 5925868fb7
commit 7fc61d7eb7
1 changed files with 12 additions and 3 deletions
--- a/src/OpenFOAM/db/dictionary/functionEntries/negEntry/negEntry.C
+++ b/src/OpenFOAM/db/dictionary/functionEntries/negEntry/negEntry.C
@ -85,11 +85,20 @@ Foam::string Foam::functionEntries::negEntry::negateVariable
    {
        const token variable(ePtr->stream());

-        // Negate variable
+        // Convert to a string
        OStringStream os(is.format());
-        os << '-' << variable;
+        os << variable;
+        const string str(os.str());

-        return os.str();
+        // Negate
+        if (str[0] == '-')
+        {
+            return str(1, str.size() - 1);
+        }
+        else
+        {
+            return '-' + str;
+        }
    }
    else
    {