more const in root

src/dmodule.d

@@ -539,7 +539,7 @@ public:
     Module parse()
     {
         //printf("Module::parse(srcfile='%s') this=%p\n", srcfile->name->toChars(), this);
-        char* srcname = srcfile.name.toChars();
+        const(char)* srcname = srcfile.name.toChars();
         //printf("Module::parse(srcname = '%s')\n", srcname);
         isPackageFile = (strcmp(srcfile.name.name(), "package.d") == 0);
         char* buf = cast(char*)srcfile.buffer;

src/root/file.d

@@ -20,7 +20,7 @@ struct File
     int _ref; // != 0 if this is a reference to someone else's buffer
     ubyte* buffer; // data for our file
     size_t len; // amount of data in buffer[]
-    FileName* name; // name of our file
+    const(FileName)* name; // name of our file
 
     extern (D) this(const(char)* n)
     {
@@ -40,7 +40,7 @@ struct File
         _ref = 0;
         buffer = null;
         len = 0;
-        name = cast(FileName*)n;
+        name = n;
     }
 
     extern (C++) ~this()
@@ -59,7 +59,7 @@ struct File
 
     extern (C++) char* toChars()
     {
-        return name.toChars();
+        return cast(char*)name.toChars();
     }
 
     /*************************************
@@ -73,7 +73,7 @@ struct File
             size_t size;
             stat_t buf;
             ssize_t numread;
-            char* name = this.name.toChars();
+            const(char)* name = this.name.toChars();
             //printf("File::read('%s')\n",name);
             int fd = open(name, O_RDONLY);
             if (fd == -1)
@@ -126,7 +126,7 @@ struct File
         {
             DWORD size;
             DWORD numread;
-            char* name = this.name.toChars();
+            const(char)* name = this.name.toChars();
             HANDLE h = CreateFileA(name, GENERIC_READ, FILE_SHARE_READ, null, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL | FILE_FLAG_SEQUENTIAL_SCAN, null);
             if (h == INVALID_HANDLE_VALUE)
                 goto err1;
@@ -173,7 +173,7 @@ struct File
         version (Posix)
         {
             ssize_t numwritten;
-            char* name = this.name.toChars();
+            const(char)* name = this.name.toChars();
             int fd = open(name, O_CREAT | O_WRONLY | O_TRUNC, (6 << 6) | (4 << 3) | 4);
             if (fd == -1)
                 goto err;
@@ -192,7 +192,7 @@ struct File
         else version (Windows)
         {
             DWORD numwritten;
-            char* name = this.name.toChars();
+            const(char)* name = this.name.toChars();
             HANDLE h = CreateFileA(name, GENERIC_WRITE, 0, null, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL | FILE_FLAG_SEQUENTIAL_SCAN, null);
             if (h == INVALID_HANDLE_VALUE)
                 goto err;

src/root/filename.d

@@ -31,7 +31,7 @@ struct FileName
         this.str = mem.xstrdup(str);
     }
 
-    extern (C++) bool equals(RootObject obj)
+    extern (C++) bool equals(const RootObject obj) const
     {
         return compare(obj) == 0;
     }
@@ -41,7 +41,7 @@ struct FileName
         return compare(name1, name2) == 0;
     }
 
-    extern (C++) int compare(RootObject obj)
+    extern (C++) int compare(const RootObject obj) const
     {
         return compare(str, (cast(FileName*)obj).str);
     }
@@ -114,7 +114,7 @@ struct FileName
         }
     }
 
-    extern (C++) const(char)* ext()
+    extern (C++) const(char)* ext() const
     {
         return ext(str);
     }
@@ -176,7 +176,7 @@ struct FileName
         }
     }
 
-    extern (C++) const(char)* name()
+    extern (C++) const(char)* name() const
     {
         return name(str);
     }
@@ -422,7 +422,7 @@ struct FileName
     /******************************
      * Return !=0 if extensions match.
      */
-    extern (C++) bool equalsExt(const(char)* ext)
+    extern (C++) bool equalsExt(const(char)* ext) const
     {
         return equalsExt(str, ext);
     }
@@ -675,7 +675,7 @@ struct FileName
         mem.xfree(cast(void*)str);
     }
 
-    extern (C++) char* toChars()
+    extern (C++) const(char)* toChars() const
     {
         return cast(char*)str; // toChars() should really be const
     }

src/root/filename.h

@@ -53,7 +53,7 @@ struct FileName
     static const char *canonicalName(const char *name);
 
     static void free(const char *str);
-    char *toChars();
+    const char *toChars() const;
 };
 
 #endif

src/root/outbuffer.d

@@ -276,7 +276,7 @@ struct OutBuffer
         offset += 4;
     }
 
-    extern (C++) void write(OutBuffer* buf)
+    extern (C++) void write(const OutBuffer* buf)
     {
         if (buf)
         {

src/root/stringtable.d

@@ -86,12 +86,12 @@ struct StringValue
         return cast(char*)(&this + 1);
     }
 
-    extern (C++) const(size_t) len()
+    extern (C++) size_t len() const
     {
         return length;
     }
 
-    extern (C++) const(const(char)*) toDchars()
+    extern (C++) const(char)* toDchars() const
     {
         return cast(const(char)*)(&this + 1);
     }