On 10/25/22 15:07, WhatMeWorry wrote:
> auto screen = executeShell(cmdLine);
> auto s;
That can't work because there is no information to infer the type of
's'. Judging from the return type of getPath, perhaps it's string[]:
string[] s;
This is the question we should answer first: What should happen when
executeShell fails?
a) It is an error; the program should not continue. Then we can use
'enforce' (this is my way of coding):
string[] getPath(string cmdLine)
{
import std.exception : enforce;
auto screen = executeShell(cmdLine);
enforce(screen.status == 0, format!"%s failed:\n%s"(cmdLine,
screen.output));
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(';'));
}
b) It is not an error; getPath() should return empty array:
string[] getPath(string cmdLine)
{
string[] result;
auto screen = executeShell(cmdLine);
if (screen.status != 0)
{
writeln(cmdLine, " failed");
return null; // <-- HERE (null converts to any array type)
}
else
{
// ...
// Now, 'return' is where 's' is defined:
return (s.split(';'));
}
}
Ali
