Page 462 of Programming in D book.
The goal is to only run debug(binarySearch), and not regular
debug.
Looking for the CLI for dub or dmd.
Tried:
dmd source/app.d -w -debug=binarySearch
but it printed all the debug statements.
What CLI command will get the job done?
```
import std.stdio;
void main() {
auto numbers = [-100, 0, 1, 2, 7, 10, 42, 365, 1000];
auto index = binarySearch(numbers, 42);
writeln("Index: ", index);
}
size_t binarySearch(const int[] values, int value) {
debug writefln("searching %s among %s", value, values);
if (values.length == 0) {
debug(binarySearch) writefln("%s not found", value);
return size_t.max;
}
immutable midPoint = values.length / 2;
debug writefln("considering index %s", midPoint);
if (value == values[midPoint]) {
debug writefln("found %s at index %s", value, midPoint);
return midPoint;
} else if (value < values[midPoint]) {
debug(binarySearch) writefln("must be in the first half");
return binarySearch(values[0 .. midPoint], value);
} else {
debug writefln("must be in the second half");
return binarySearch(values[midPoint + 1 .. $], value);
}
}
```
