[问答]

Cosmic CXSTM8 Comiler Error无效的常量表达式

问答对人有帮助，内容完整，我也想知道答案 0 我正在将一些设计为在Nordic nRF8200上运行的代码移植到STM8L152C6。代码是使用Keil C5编写的。我正在使用Cosmic CXSTM8编译器。我在CASE中遇到编译器错误'Invalid Constant Expression'：我无法理解的switch语句行。代码段包含在下面。开关（pipe_num） { 案例PIPE_LINK_LOSS_ALERT_ALERT_LEVEL_RX： alert_handle_on_link_loss =（alert_level_t）buffer [0]; 打破; 默认：打破; } pipe_num是本地定义的uint8_t，和 #define PIPE_LINK_LOSS_ALERT_ALERT_LEVEL_RX 6在包含的头文件中声明。在这种情况下，我无法理解编译器正在处理异常。如果有人可以提供帮助，我会非常感激。以上来自于谷歌翻译以下为原文 I'm porting some code designed to run on a Nordic nRF8200 to an STM8L152C6. The code was orginally compiled using Keil C5. I am using the Cosmic CXSTM8 compiler. I am getting a compiler error 'Invalid Constant Expression' in the CASE: line of a switch statement that I cannot understand. code snippet is included below. switch (pipe_num) { case PIPE_LINK_LOSS_ALERT_ALERT_LEVEL_RX: alert_handle_on_link_loss = (alert_level_t)buffer[0]; break; default: break; } pipe_num is a locally defined uint8_t, and #define PIPE_LINK_LOSS_ALERT_ALERT_LEVEL_RX 6 is declared in an included header file. I cannot understand what the compiler is taking exception to in this case. If anyone could help I'd really appreciate it. 0
2019-1-23 16:27:25　　评论淘帖0 邀请回答您可以邀请以下用户，快速回答问题 × wang21cj 该类别下有 44 个回答。邀请回答新星之火12138 该类别下有 41 个回答。邀请回答 chm5 该类别下有 39 个回答。邀请回答 hgimtk 该类别下有 33 个回答。邀请回答 HengDu 该类别下有 30 个回答。邀请回答 hwp0415229 该类别下有 28 个回答。邀请回答 jghgfdssas 该类别下有 28 个回答。邀请回答可口可甜该类别下有 26 个回答。邀请回答 kingnet6688 该类别下有 26 个回答。邀请回答颜刚YanG 该类别下有 26 个回答。邀请回答 zyh34997 该类别下有 25 个回答。邀请回答柱子图宁该类别下有 25 个回答。邀请回答 jenny042 该类别下有 25 个回答。邀请回答 kingnet9999 该类别下有 25 个回答。邀请回答 andyfly7 该类别下有 25 个回答。邀请回答麻酱该类别下有 25 个回答。邀请回答 jiangwenwen 该类别下有 24 个回答。邀请回答 gXDhn 该类别下有 24 个回答。邀请回答哼小曲该类别下有 24 个回答。邀请回答云汉007 该类别下有 24 个回答。邀请回答举报李可仪相关推荐 • 写入位结构时的CXSTM8错误 1759 • 无法用Cosmic编译 3776 • 无法用Cosmic编译 2137 • Cosmic编译器许可证失效了怎么处理？ 423 • stm8l151c8 COSMIC代码问题 2776 • STM8 Cosmic的STVD工具集配置 3467 • FlexLM编译器错误 9406 • 关于C语言的运算符和表达式--笔记1 3673 • 无法构建项目 1245 • 如何创建正则的表达式？ 1703 1个回答

答案对人有帮助，有参考价值 0 ''我在CASE中遇到编译错误'无效常量表达式'：我无法理解的switch语句行'' 首先，在此之前是否还有其他错误或警告？如果是这样，你的意思是这一行：案例PIPE_LINK_LOSS_ALERT_ALERT_LEVEL_RX：唯一的常量表达式是PIPE_LINK_LOSS_ALERT_ALERT_LEVEL_RX - 因此请重新检查该定义。例如，您是否确定它不受某些条件编译选项的影响，而这些选项在项目中没有（正确）设置...？ Howver， alert_handle_on_link_loss =（alert_level_t）buffer [0]; 也是一个不变的表达 - 你确定它不抱怨吗？ “在这种情况下，我无法理解编译器正在处理异常的问题” 您是否尝试过查看预处理器输出？请参阅：http：//www.8052.com/forum/read/29152 这不是8052特定的 - 确保你没有犯过那里提到的错误！以上来自于谷歌翻译以下为原文 ''I am getting a compiler error 'Invalid Constant Expression' in the CASE: line of a switch statement that I cannot understand'' First, are there any other errors or warnings before this? If so, You mean this line: case PIPE_LINK_LOSS_ALERT_ALERT_LEVEL_RX: The only constant expression there is PIPE_LINK_LOSS_ALERT_ALERT_LEVEL_RX - so re-check that definition. Are you sure it isn't, for example, affected by some conditional compilation options that you've not (properly) set-up in your project...? Howver, alert_handle_on_link_loss = (alert_level_t)buffer[0]; is also a constant expression - are you sure it's not complaining about that? ''I cannot understand what the compiler is taking exception to in this case'' Have you tried looking at the preprocessor output? See: http://www.8052.com/forum/read/29152 It's not 8052-specific - and do make sure that you haven't made the very mistake mentioned there!

2019-1-23 16:44:32 评论举报张建军