diff options
Diffstat (limited to 'src/doc/book/listings/ch12-an-io-project/output-only-02-missing-lifetimes')
6 files changed, 103 insertions, 0 deletions
diff --git a/src/doc/book/listings/ch12-an-io-project/output-only-02-missing-lifetimes/Cargo.lock b/src/doc/book/listings/ch12-an-io-project/output-only-02-missing-lifetimes/Cargo.lock new file mode 100644 index 000000000..88bf82d16 --- /dev/null +++ b/src/doc/book/listings/ch12-an-io-project/output-only-02-missing-lifetimes/Cargo.lock @@ -0,0 +1,6 @@ +# This file is automatically @generated by Cargo. +# It is not intended for manual editing. +[[package]] +name = "minigrep" +version = "0.1.0" + diff --git a/src/doc/book/listings/ch12-an-io-project/output-only-02-missing-lifetimes/Cargo.toml b/src/doc/book/listings/ch12-an-io-project/output-only-02-missing-lifetimes/Cargo.toml new file mode 100644 index 000000000..64c2a3f52 --- /dev/null +++ b/src/doc/book/listings/ch12-an-io-project/output-only-02-missing-lifetimes/Cargo.toml @@ -0,0 +1,6 @@ +[package] +name = "minigrep" +version = "0.1.0" +edition = "2021" + +[dependencies] diff --git a/src/doc/book/listings/ch12-an-io-project/output-only-02-missing-lifetimes/output.txt b/src/doc/book/listings/ch12-an-io-project/output-only-02-missing-lifetimes/output.txt new file mode 100644 index 000000000..93116dd5e --- /dev/null +++ b/src/doc/book/listings/ch12-an-io-project/output-only-02-missing-lifetimes/output.txt @@ -0,0 +1,16 @@ +$ cargo build + Compiling minigrep v0.1.0 (file:///projects/minigrep) +error[E0106]: missing lifetime specifier + --> src/lib.rs:28:51 + | +28 | pub fn search(query: &str, contents: &str) -> Vec<&str> { + | ---- ---- ^ expected named lifetime parameter + | + = help: this function's return type contains a borrowed value, but the signature does not say whether it is borrowed from `query` or `contents` +help: consider introducing a named lifetime parameter + | +28 | pub fn search<'a>(query: &'a str, contents: &'a str) -> Vec<&'a str> { + | ++++ ++ ++ ++ + +For more information about this error, try `rustc --explain E0106`. +error: could not compile `minigrep` due to previous error diff --git a/src/doc/book/listings/ch12-an-io-project/output-only-02-missing-lifetimes/poem.txt b/src/doc/book/listings/ch12-an-io-project/output-only-02-missing-lifetimes/poem.txt new file mode 100644 index 000000000..870752731 --- /dev/null +++ b/src/doc/book/listings/ch12-an-io-project/output-only-02-missing-lifetimes/poem.txt @@ -0,0 +1,9 @@ +I'm nobody! Who are you? +Are you nobody, too? +Then there's a pair of us - don't tell! +They'd banish us, you know. + +How dreary to be somebody! +How public, like a frog +To tell your name the livelong day +To an admiring bog! diff --git a/src/doc/book/listings/ch12-an-io-project/output-only-02-missing-lifetimes/src/lib.rs b/src/doc/book/listings/ch12-an-io-project/output-only-02-missing-lifetimes/src/lib.rs new file mode 100644 index 000000000..df623bdea --- /dev/null +++ b/src/doc/book/listings/ch12-an-io-project/output-only-02-missing-lifetimes/src/lib.rs @@ -0,0 +1,48 @@ +use std::error::Error; +use std::fs; + +pub struct Config { + pub query: String, + pub file_path: String, +} + +impl Config { + pub fn build(args: &[String]) -> Result<Config, &'static str> { + if args.len() < 3 { + return Err("not enough arguments"); + } + + let query = args[1].clone(); + let file_path = args[2].clone(); + + Ok(Config { query, file_path }) + } +} + +pub fn run(config: Config) -> Result<(), Box<dyn Error>> { + let contents = fs::read_to_string(config.file_path)?; + + Ok(()) +} + +// ANCHOR: here +pub fn search(query: &str, contents: &str) -> Vec<&str> { + vec![] +} +// ANCHOR_END: here + +#[cfg(test)] +mod tests { + use super::*; + + #[test] + fn one_result() { + let query = "duct"; + let contents = "\ +Rust: +safe, fast, productive. +Pick three."; + + assert_eq!(vec!["safe, fast, productive."], search(query, contents)); + } +} diff --git a/src/doc/book/listings/ch12-an-io-project/output-only-02-missing-lifetimes/src/main.rs b/src/doc/book/listings/ch12-an-io-project/output-only-02-missing-lifetimes/src/main.rs new file mode 100644 index 000000000..a4f8a7411 --- /dev/null +++ b/src/doc/book/listings/ch12-an-io-project/output-only-02-missing-lifetimes/src/main.rs @@ -0,0 +1,18 @@ +use std::env; +use std::process; + +use minigrep::Config; + +fn main() { + let args: Vec<String> = env::args().collect(); + + let config = Config::build(&args).unwrap_or_else(|err| { + println!("Problem parsing arguments: {err}"); + process::exit(1); + }); + + if let Err(e) = minigrep::run(config) { + println!("Application error: {e}"); + process::exit(1); + } +} |