add type utilities

types.go

@@ -4,6 +4,10 @@ package luajit
 #include <lua.h>
 */
 import "C"
+import (
+	"fmt"
+	"strconv"
+)
 
 // LuaType represents Lua value types
 type LuaType int
@@ -49,3 +53,100 @@ func (t LuaType) String() string {
 		return "unknown"
 	}
 }
+
+// ConvertValue converts a value to the requested type with proper type conversion
+func ConvertValue[T any](value any) (T, bool) {
+	var zero T
+
+	// Handle nil case
+	if value == nil {
+		return zero, false
+	}
+
+	// Try direct type assertion first
+	if result, ok := value.(T); ok {
+		return result, true
+	}
+
+	// Type-specific conversions
+	switch any(zero).(type) {
+	case string:
+		switch v := value.(type) {
+		case float64:
+			return any(fmt.Sprintf("%g", v)).(T), true
+		case int:
+			return any(strconv.Itoa(v)).(T), true
+		case bool:
+			if v {
+				return any("true").(T), true
+			}
+			return any("false").(T), true
+		}
+	case int:
+		switch v := value.(type) {
+		case float64:
+			return any(int(v)).(T), true
+		case string:
+			if i, err := strconv.Atoi(v); err == nil {
+				return any(i).(T), true
+			}
+		case bool:
+			if v {
+				return any(1).(T), true
+			}
+			return any(0).(T), true
+		}
+	case float64:
+		switch v := value.(type) {
+		case int:
+			return any(float64(v)).(T), true
+		case string:
+			if f, err := strconv.ParseFloat(v, 64); err == nil {
+				return any(f).(T), true
+			}
+		case bool:
+			if v {
+				return any(1.0).(T), true
+			}
+			return any(0.0).(T), true
+		}
+	case bool:
+		switch v := value.(type) {
+		case string:
+			switch v {
+			case "true", "yes", "1":
+				return any(true).(T), true
+			case "false", "no", "0":
+				return any(false).(T), true
+			}
+		case int:
+			return any(v != 0).(T), true
+		case float64:
+			return any(v != 0).(T), true
+		}
+	}
+
+	return zero, false
+}
+
+// GetTypedValue gets a value from the state with type conversion
+func GetTypedValue[T any](s *State, index int) (T, bool) {
+	var zero T
+
+	// Get the value as any type
+	value, err := s.ToValue(index)
+	if err != nil {
+		return zero, false
+	}
+
+	// Convert it to the requested type
+	return ConvertValue[T](value)
+}
+
+// GetGlobalTyped gets a global variable with type conversion
+func GetGlobalTyped[T any](s *State, name string) (T, bool) {
+	s.GetGlobal(name)
+	defer s.Pop(1)
+
+	return GetTypedValue[T](s, -1)
+}