Move ThreadContext to execute.hpp

Author: chfast

lib/fizzy/execute.hpp

@@ -41,6 +41,28 @@ constexpr ExecutionResult Void{true};
 /// Shortcut for execution that resulted in a trap.
 constexpr ExecutionResult Trap{false};
 
+
+class ThreadContext
+{
+    class [[nodiscard]] Guard
+    {
+        ThreadContext& m_thread_context;
+
+    public:
+        explicit Guard(ThreadContext& ctx) noexcept : m_thread_context{ctx} {}
+        ~Guard() noexcept { --m_thread_context.depth; }
+    };
+
+public:
+    int depth = 0;
+
+    Guard bump_call_depth() noexcept
+    {
+        ++depth;
+        return Guard{*this};
+    }
+};
+
 /// Execute a function from an instance.
 ///
 /// @param  instance    The instance.

lib/fizzy/instantiate.hpp

@@ -20,27 +20,7 @@ namespace fizzy
 {
 struct ExecutionResult;
 struct Instance;
-
-class ThreadContext
-{
-    class [[nodiscard]] Guard
-    {
-        ThreadContext& m_thread_context;
-
-    public:
-        explicit Guard(ThreadContext& ctx) noexcept : m_thread_context{ctx} {}
-        ~Guard() noexcept { --m_thread_context.depth; }
-    };
-
-public:
-    int depth = 0;
-
-    Guard bump_call_depth() noexcept
-    {
-        ++depth;
-        return Guard{*this};
-    }
-};
+class ThreadContext;
 
 /// Function representing WebAssembly or host function execution.
 using execute_function = std::function<ExecutionResult(Instance&, const Value*, ThreadContext&)>;