[−][src]Crate scanner_rust
Scanner
This crate provides Java-like Scanners which can parse primitive types and strings using UTF-8 or ASCII.
Scan a stream
Scanner
or ScannerAscii
can be used for reading strings or raw data from a stream.
extern crate scanner_rust; use std::io::{self, Write}; use scanner_rust::ScannerAscii; print!("Please input two integers, a and b: "); io::stdout().flush().unwrap(); let mut sc = ScannerAscii::new(io::stdin()); let a = { loop { match sc.next_isize() { Ok(i) => break i.unwrap_or(0), Err(_) => { print!("Re-input a: "); io::stdout().flush().unwrap(); } } } }; let b = { loop { match sc.next_isize() { Ok(i) => break i.unwrap_or(0), Err(_) => { print!("Re-input b: "); io::stdout().flush().unwrap(); } } } }; println!("{} + {} = {}", a, b, a + b);
Besides, the drop_next
and drop_next_line
methods are useful when you want to skip some data.
Scan a string slice (&str
)
ScannerStr
can be used for reading strings from a string slice.
extern crate scanner_rust; use std::io::{self, Write}; use scanner_rust::ScannerStr; let mut sc = ScannerStr::new(" 123 456.7 \t\r\n\n c中文字\n\tHello world!"); assert_eq!(Some(123), sc.next_u8().unwrap()); assert_eq!(Some(456.7), sc.next_f64().unwrap()); assert_eq!(Some(' '), sc.next_char().unwrap()); assert_eq!(Some(' '), sc.next_char().unwrap()); assert_eq!(true, sc.skip_whitespaces().unwrap()); assert_eq!(Some('c'), sc.next_char().unwrap()); assert_eq!(Some("中文字"), sc.next_line().unwrap()); assert_eq!(Some("\tHello world!".into()), sc.next_line().unwrap()); assert_eq!(None, sc.next_line().unwrap());
Scan a u8 slice
ScannerU8Slice
or ScannerU8SliceAscii
can be used for reading raw data from a u8
slice.
extern crate scanner_rust; use std::io::{self, Write}; use scanner_rust::ScannerU8Slice; let mut sc = ScannerU8Slice::new(" 123 456.7 \t\r\n\n c中文字\n\tHello world!".as_bytes()); assert_eq!(Some(123), sc.next_u8().unwrap()); assert_eq!(Some(456.7), sc.next_f64().unwrap()); assert_eq!(Some(' '), sc.next_char().unwrap()); assert_eq!(Some(' '), sc.next_char().unwrap()); assert_eq!(true, sc.skip_whitespaces().unwrap()); assert_eq!(Some('c'), sc.next_char().unwrap()); assert_eq!(Some("中文字".as_bytes()), sc.next_line().unwrap()); assert_eq!(Some("\tHello world!".as_bytes()), sc.next_line().unwrap()); assert_eq!(None, sc.next_line().unwrap());
Structs
Scanner | A simple text scanner which can parse primitive types and strings using UTF-8. |
ScannerAscii | A simple text scanner which can parse primitive types and strings using ASCII. |
ScannerStr | A simple text scanner which can in-memory-ly parse primitive types and strings using UTF-8 from a string slice. |
ScannerU8Slice | A simple text scanner which can in-memory-ly parse primitive types and strings using UTF-8 from a byte slice. |
ScannerU8SliceAscii | A simple text scanner which can in-memory-ly parse primitive types and strings using ASCII from a byte slice. |
Enums
ScannerError | The possible errors of |