Switch to 32-bit math by default.

I'll need a way to get back into 64-bit mode.

js4g/StackMachine.h

@@ -32,14 +32,17 @@ namespace Dillo::Hydrogen::JavaScriptForge	::detail::  StackMachine_m
 	class exports::StackMachine
 	{
 		private:
-			using Integer= std::int64_t;
+			using Long= std::uint64_t;
+			using Integer= std::int32_t;
 			using Float= long double;
 
+			using Value= std::variant< std::string, Integer, Long >;
+
 			// The main runtime stack of the forth engine.
 			// It grows on the "back".
 			// A `std::deque` is used instead of `std::vector`, because
 			// it helps cut down on large allocations, by subdividing things.
-			std::vector< std::variant< std::string, Integer > > stack;
+			std::vector< Value > stack;
 
 			// TODO: Should these tokens be binary?
 			// Upside: compressed.
@@ -86,12 +89,13 @@ namespace Dillo::Hydrogen::JavaScriptForge	::detail::  StackMachine_m
 
 			void runWord( std::string_view word );
 
-			std::variant< std::string, Integer > pop();
-			std::variant< std::string, Integer > &peek();
+			Value pop();
+			Value &peek();
 
 			void push( std::string s );
 			void push( Integer s );
-			void push( std::variant< std::string, Integer > s );
+			void push( Long s );
+			void push( Value s );
 
 			template< typename T >
 			T pop();