Preparation for building instructions

src/spider/runtime/common.hpp

@@ -8,6 +8,7 @@
 
 namespace spider {
 
+    // Absolute Types
     using u8 = std::uint8_t;
     using u16 = std::uint16_t;
     using u32 = std::uint32_t;
@@ -25,6 +26,9 @@ namespace spider {
     static_assert(sizeof(f32) == 4, "The f32 type must be exactly 4 bytes.");
     static_assert(sizeof(f64) == 8, "The f64 type must be exactly 8 bytes.");
 
+    // Utility types
+    using isize = std::size_t;
+
     // Utility imports
     using std::vector;
     using std::deque;