diff options
Diffstat (limited to 'src/doc/book/listings/ch19-advanced-features/listing-19-22')
3 files changed, 29 insertions, 0 deletions
diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-22/Cargo.lock b/src/doc/book/listings/ch19-advanced-features/listing-19-22/Cargo.lock new file mode 100644 index 000000000..b1977d01e --- /dev/null +++ b/src/doc/book/listings/ch19-advanced-features/listing-19-22/Cargo.lock @@ -0,0 +1,6 @@ +# This file is automatically @generated by Cargo. +# It is not intended for manual editing. +[[package]] +name = "traits-example" +version = "0.1.0" + diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-22/Cargo.toml b/src/doc/book/listings/ch19-advanced-features/listing-19-22/Cargo.toml new file mode 100644 index 000000000..52395a587 --- /dev/null +++ b/src/doc/book/listings/ch19-advanced-features/listing-19-22/Cargo.toml @@ -0,0 +1,6 @@ +[package] +name = "traits-example" +version = "0.1.0" +edition = "2021" + +[dependencies] diff --git a/src/doc/book/listings/ch19-advanced-features/listing-19-22/src/main.rs b/src/doc/book/listings/ch19-advanced-features/listing-19-22/src/main.rs new file mode 100644 index 000000000..febe58b0c --- /dev/null +++ b/src/doc/book/listings/ch19-advanced-features/listing-19-22/src/main.rs @@ -0,0 +1,17 @@ +// ANCHOR: here +use std::fmt; + +trait OutlinePrint: fmt::Display { + fn outline_print(&self) { + let output = self.to_string(); + let len = output.len(); + println!("{}", "*".repeat(len + 4)); + println!("*{}*", " ".repeat(len + 2)); + println!("* {} *", output); + println!("*{}*", " ".repeat(len + 2)); + println!("{}", "*".repeat(len + 4)); + } +} +// ANCHOR_END: here + +fn main() {} |