编译此函数时没有响应？

发布于 2024-11-06 11:56:29 字数 501 浏览 3 评论 0原文

我尝试使用 Delphi XE，但编译时没有响应。它在您的计算机上可以运行还是功能有问题？

function Test(const FileName: string;
  const Force: boolean = false): boolean;
var
  IsAllowed: boolean;
begin
  result := false;
  if FileExists(FileName) then
  begin
    try
      if (Force) then
      begin
        result := false;
        exit;
      end;
    finally
      if IsAllowed then
        DeleteFile(FileName);
    end;

    try
      result := true;
    except
      result := false;
    end;
  end;
end;

原文

I tried with Delphi XE and I got Not Responding while compiling. Does it work in your computer or is there something wrong with the function?

function Test(const FileName: string;
  const Force: boolean = false): boolean;
var
  IsAllowed: boolean;
begin
  result := false;
  if FileExists(FileName) then
  begin
    try
      if (Force) then
      begin
        result := false;
        exit;
      end;
    finally
      if IsAllowed then
        DeleteFile(FileName);
    end;

    try
      result := true;
    except
      result := false;
    end;
  end;
end;

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梦在深巷 2024-11-13 11:56:29

它在我的电脑上编译。虽然我收到警告 W1036 变量“IsAllowed”可能尚未初始化。

更新：当我在 use 子句中包含 Windows 时，我可以重现挂起。
已提交到质量中心：QC93806。

program hang_test;

{$APPTYPE CONSOLE}

uses
  // Windows, // uncomment to include Windows -> hang on compile
  SysUtils;

function Test(const FileName: string; const Force: boolean = false): boolean;
  // your function here

begin
  try

  except
    on E: Exception do
      Writeln(E.ClassName, ': ', E.Message);
  end;
end.

看起来像一个错误；您应该在质量中心中报告该问题。

更新 2：可重复挂起编译器的最小情况：

function HangCompiler: Boolean;
begin
  try
    Exit; // 1. exit from a try..finally
  finally
    DeleteFile(''); // 2. inlined function call in finally (include Windows to inline)
  end;
  // 3. try..except
  try
    Result := True;
  except
    Result := False;
  end;
end;

It compiles on my computer. Though I get the warning W1036 Variable 'IsAllowed' might not have been initialized.

Update: I can reproduce the hang when I include Windows in the uses clause.
Subbmitted to Quality Central: QC93806.

program hang_test;

{$APPTYPE CONSOLE}

uses
  // Windows, // uncomment to include Windows -> hang on compile
  SysUtils;

function Test(const FileName: string; const Force: boolean = false): boolean;
  // your function here

begin
  try

  except
    on E: Exception do
      Writeln(E.ClassName, ': ', E.Message);
  end;
end.

It looks like a bug; you should report it in the Quality Central.

Update 2: Minimal case which reproducibly hangs the compiler:

function HangCompiler: Boolean;
begin
  try
    Exit; // 1. exit from a try..finally
  finally
    DeleteFile(''); // 2. inlined function call in finally (include Windows to inline)
  end;
  // 3. try..except
  try
    Result := True;
  except
    Result := False;
  end;
end;

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