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+// Make me compile! Scroll down for hints :)
+
+mod us_presidential_frontrunners {
+ use self::democrats::HILLARY_CLINTON as democrat;
+ use self::republicans::DONALD_TRUMP as republican;
+
+ mod democrats {
+ pub const HILLARY_CLINTON: &'static str = "Hillary Clinton";
+ pub const BERNIE_SANDERS: &'static str = "Bernie Sanders";
+ }
+
+ mod republicans {
+ pub const DONALD_TRUMP: &'static str = "Donald Trump";
+ pub const JEB_BUSH: &'static str = "Jeb Bush";
+ }
+}
+
+fn main() {
+ println!("candidates: {} and {}",
+ us_presidential_frontrunners::democrat,
+ us_presidential_frontrunners::republican);
+}
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+// The us_presidential_frontrunners module is trying to present an external
+// interface (the `democrat` and `republican` constants) that is different than
+// its internal structure (the `democrats` and `republicans` modules and
+// associated constants). It's almost there except for one keyword missing for
+// each constant.
+// One more hint: I wish the compiler error, instead of saying "unresolved name
+// `us_presidential_frontrunners::democrat`", could say "constant
+// `us_presidential_frontrunners::democrat` is private"! \ No newline at end of file