原文
auto screen = executeShell(cmdLine);
auto s;//这样声明?
//无法推导`"s"`的类型.
//从`getPath`的返回类型来看,可能是`string[]`.
//应该这样
string[] s;
...
{
s = screen.output.findSplit("REG_SZ");
}
//但不编译.
string[] getPath(string cmdLine)
{
auto screen = executeShell(cmdLine);
if (screen.status != 0)
{
writeln(cmdLine, " failed");
}
else
{
writeln("screen.output = ", screen.output);
auto s = screen.output.findSplit("REG_SZ");
writeln("s[0] = ", s[0]);
writeln("s[1] = ", s[1]);
writeln("s[2] = ", s[2]);
}
return (s.split(';')); // 未定义s
}
string[] getPath(string cmdLine)
{
import std.exception : enforce;
auto screen = executeShell(cmdLine);
enforce(screen.status == 0, format!"%s failed:\n%s"(cmdLine, screen.output));
//确保
writeln("screen.output = ", screen.output);
//后面略....
}
string[] getPath(string cmdLine)
{
string[] result;
auto screen = executeShell(cmdLine);
if (screen.status != 0)
{
writeln(cmdLine, " failed");
return null; // 在此(`无效`转数组)
}
else
{
// ...
// 现在返回s定义的.
return (s.split(';'));
}
}