Issue 4127 - [emscripten] Convert subscription classes to C++ - Part 1

compiled/String.h

Index: compiled/String.h
===================================================================
--- a/compiled/String.h
+++ b/compiled/String.h
@@ -344,16 +344,28 @@ public:
       return;
 
     assert(source, u"Null buffer passed to OwnedString.append()"_str);
     size_t oldLength = length();
     grow(sourceLen);
     std::memcpy(mBuf + oldLength, source, sizeof(value_type) * sourceLen);
   }
 
+  void append(const char* source, size_type sourceLen)
+  {
+    if (!sourceLen)
+      return;
+
+    assert(source, u"Null buffer passed to OwnedString.append()"_str);
+    size_t oldLength = length();
+    grow(sourceLen);
+    for (size_t i = 0; i < sourceLen; i++)
+      mBuf[oldLength + i] = source[i];
+  }
+
   void append(const String& str)
   {
     append(str.mBuf, str.length());
   }
 
   void append(value_type c)
   {
     append(&c, 1);
@@ -366,17 +378,17 @@ public:
     bool negative = false;
     if (num < 0)
     {
       negative = true;
       num = -num;
     }
 
     size_type size = 0;
-    for (int i = num; i; i /= 10)
+    for (T i = num; i; i /= 10)
       size++;
     size = (size ? size : 1);
 
     size_type pos = length();
     grow((negative ? 1 : 0) + size);
 
     if (negative)
       mBuf[pos++] = '-';