lldb报use of undeclared identifier
时间: 2023-10-09 10:14:04 浏览: 175
这个错误通常意味着您正在使用一个未声明的标识符,可能是变量、函数或对象。这可能是因为您的代码中缺少了必要的头文件或命名空间。
为了解决此问题,请查看您的代码并确保所有标识符都已正确声明并位于正确的作用域中。如果需要,可以添加适当的头文件或使用命名空间来解决名称冲突。如果问题仍然存在,请检查您的编译器和IDE设置是否正确配置。
相关问题
Playground execution failed: /var/folders/8b/b2dxlhsd1s74pjswbjrr_7t40000gn/T/./lldb/377/playground449.swift:5:19: error: use of undeclared type 'Error' enum EnrollError: Error { ^~~~~ /var/folders/8b/b2dxlhsd1s74pjswbjrr_7t40000gn/T/./lldb/377/playground449.swift:5:6: error: type 'EnrollError' does not conform to protocol 'RawRepresentable' enum EnrollError: Error { ^ Swift.RawRepresentable:9:13: note: protocol requires nested type 'RawValue' typealias RawValue ^ /var/folders/8b/b2dxlhsd1s74pjswbjrr_7t40000gn/T/./lldb/377/playground449.swift:16:31: error: thrown expression type 'EnrollError' does not conform to 'ErrorType' throw EnrollError.notAvailable ~~~~~~~~~~~~^~~~~~~~~~~~ /var/folders/8b/b2dxlhsd1s74pjswbjrr_7t40000gn/T/./lldb/377/playground449.swift:19:31: error: thrown expression type 'EnrollError' does not conform to 'ErrorType' throw EnrollError.notQualified ~~~~~~~~~~~~^~~~~~~~~~~~ /var/folders/8b/b2dxlhsd1s74pjswbjrr_7t40000gn/T/./lldb/377/playground449.swift:22:31: error: thrown expression type 'EnrollError' does not conform to 'ErrorType' throw EnrollError.alreadyEnrolled
抱歉,可能是由于Swift版本的问题导致代码无法运行。以下是更新后的代码,希望能够解决问题:
```
enum EnrollError: Error {
case notAvailable
case notQualified
case alreadyEnrolled
}
class VendingCourse {
var availableSlots = 3
var isQualified = false
var isEnrolled = false
func enroll() throws {
guard availableSlots > 0 else {
throw EnrollError.notAvailable
}
guard isQualified else {
throw EnrollError.notQualified
}
guard !isEnrolled else {
throw EnrollError.alreadyEnrolled
}
availableSlots -= 1
isEnrolled = true
print("Enrollment successful!")
}
}
let course = VendingCourse()
course.isQualified = true
do {
try course.enroll()
} catch EnrollError.notAvailable {
print("No available slots.")
} catch EnrollError.notQualified {
print("Not qualified to enroll.")
} catch EnrollError.alreadyEnrolled {
print("Already enrolled.")
} catch {
print("An unknown error occurred.")
}
```
如果您还遇到问题,可以告诉我具体的错误信息,我会尽力帮助您解决问题。
vscode lldb
vscode lldb是一种在Visual Studio Code中使用的调试器工具,用于调试程序的执行过程。它可以与LLDB(Low Level Debugger)进行交互,通过连接到正在运行的程序来查看和修改程序的状态。
要使用vscode lldb,首先需要配置LLDB的连接。类似于使用gdb,你需要停留在适当的位置并等待lldb的连接。具体的使用方法可以参考vscode lldb的文档,或者前往gdb篇章中的vscode LLDB查看corefile部分。
在配置好lldb-server后,你可以将lldb-server推送到Android设备,并运行以下命令:`./lldb-server p --listen ":5039" --server`。
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