|
|
@@ -0,0 +1,46 @@
|
|
|
+
|
|
|
+fn formatted_stuff() {
|
|
|
+ // string formatting
|
|
|
+
|
|
|
+ // automatically casts to string (I assume that's a trait?)
|
|
|
+ println!("{} days", 31);
|
|
|
+
|
|
|
+ // Positional arguments
|
|
|
+ // it should check that all are there at compile time
|
|
|
+ println!("{0}, this is {1}. {1}, this is {0}", "Alice", "Bob");
|
|
|
+ // it does check. this form uses macros (makes sense, really)
|
|
|
+ // Something like "error: invalid reference to argument `2` (there are 2 arguments)"
|
|
|
+
|
|
|
+
|
|
|
+ // named argments, too
|
|
|
+ println!("{subject} {verb} {object}",
|
|
|
+ object="the lazy dog",
|
|
|
+ subject="the quick brown fox",
|
|
|
+ verb="jumps over");
|
|
|
+
|
|
|
+ // formatting flags are announced by ':'
|
|
|
+ // I'm guessing 'b' means 'format as a binary number'
|
|
|
+ println!("{} of {:b} people know binary, the other half doesn't", 1, 2);
|
|
|
+
|
|
|
+ // "width", with padding
|
|
|
+ println!("{number:>width$}", number=1, width=6);
|
|
|
+
|
|
|
+ // and zero padding
|
|
|
+ println!("{number:>0width$}", number=1, width=6);
|
|
|
+ // this doesn't work for all characters -- just 0
|
|
|
+ // the '$' means "look for the width in the named argument 'width'
|
|
|
+ // can also use a positional argument
|
|
|
+ println!("{number:>0$}", 6, number=1);
|
|
|
+ // or an inline width
|
|
|
+ println!("{number:>6}", number=1);
|
|
|
+
|
|
|
+
|
|
|
+ // see https://doc.rust-lang.org/std/fmt/ for more info
|
|
|
+
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+fn main() {
|
|
|
+
|
|
|
+ formatted_stuff();
|
|
|
+}
|
