科学计数法优化

Author: iAmMccc

Sources/SmartCodable/Core/JSONValue/JSONValue.swift

@@ -127,7 +127,8 @@ extension JSONValue {
 extension NSNumber {
     static func fromJSONNumber(_ string: String) -> NSNumber? {
         let decIndex = string.firstIndex(of: ".")
-        let expIndex = string.firstIndex(of: "e")
+        // JSON 规范允许大写 E 作为科学计数法标记，这里需要一并识别
+        let expIndex = string.firstIndex(where: { $0 == "e" || $0 == "E" })
         let isInteger = decIndex == nil && expIndex == nil
         let isNegative = string.utf8[string.utf8.startIndex] == UInt8(ascii: "-")
         let digitCount = string[string.startIndex..<(expIndex ?? string.endIndex)].count

Sources/SmartCodable/Core/PropertyWrapper/SmartAny/SmartAnyImpl.swift

@@ -260,10 +260,15 @@ extension JSONDecoderImpl {
             }
         case .number(let number):
             if number.contains(".") { // 浮点数
-                if number.contains("e") { // 检查字符串中是否包含字符 e，这表示数字可能以科学计数法表示
+                // JSON 规范（RFC 8259）允许 e / E 两种写法，这里需要大小写都兼容
+                if number.contains("e") || number.contains("E") { // 科学计数法
                     if let temp = container.decodeIfPresent(Decimal.self) as? NSNumber {
                         return .number(temp)
                     }
+                    // Decimal 无法覆盖次正规数（如 ±E-324）等极小值，回退到 Double 兜底
+                    if let temp = container.decodeIfPresent(Double.self) as? NSNumber {
+                        return .number(temp)
+                    }
                 } else {
                     if let temp = container.decodeIfPresent(Double.self) as? NSNumber {
                         return .number(temp)