fixup #674 - should test .length instead of .ptr

src/core/exception.d

@@ -221,7 +221,7 @@ class OutOfMemoryError : Error
 
     @trusted override const string toString()
     {
-        return msg.ptr ? (cast()super).toString() : "Memory allocation failed";
+        return msg.length ? (cast()super).toString() : "Memory allocation failed";
     }
 }
 
@@ -262,7 +262,7 @@ class InvalidMemoryOperationError : Error
 
     @trusted override const string toString()
     {
-        return msg.ptr ? (cast()super).toString() : "Invalid memory operation";
+        return msg.length ? (cast()super).toString() : "Invalid memory operation";
     }
 }
 

src/object_.d

@@ -1365,13 +1365,13 @@ class Throwable : Object
         SizeStringBuff tmpBuff = void;
 
         sink(typeid(this).name);
-        if (file.ptr)
+        if (file.length)
         {
             sink("@"); sink(file);
             sink("("); sink(line.sizeToTempString(tmpBuff)); sink(")");
         }
 
-        if (msg.ptr)
+        if (msg.length)
         {
             sink(": "), sink(msg);
         }

src/rt/cover.d

@@ -241,7 +241,7 @@ string appendFN( string path, string name )
 
     auto dest = path;
 
-    if( dest.ptr && dest[$ - 1] != sep )
+    if( dest.length && dest[$ - 1] != sep )
         dest ~= sep;
     dest ~= name;
     return dest;
@@ -264,7 +264,7 @@ string baseName( string name, string ext = null )
             ret ~= c;
         }
     }
-    return chomp( ret, ext.ptr ? ext : "" );
+    return ext.length ? chomp(ret,  ext) : ret;
 }
 
 

src/rt/trace.d

@@ -675,7 +675,7 @@ static void trace_merge()
     SymPair *sfanin;
     SymPair **psp;
 
-    if (trace_logfilename.ptr && (fp = fopen(trace_logfilename.ptr,"r")) !is null)
+    if (trace_logfilename.length && (fp = fopen(trace_logfilename.ptr,"r")) !is null)
     {
         buf = null;
         sfanin = null;