Trait messagebird_async::sms::FromStr

pub trait FromStr {
    type Err;
    fn from_str(s: &str) -> Result<Self, Self::Err>;
}

A trait to abstract the idea of creating a new instance of a type from a string.

FromStr's from_str method is often used implicitly, through str's parse method. See parse's documentation for examples.

Examples

Basic implementation of FromStr on an example Point type:

use std::str::FromStr;
use std::num::ParseIntError;

#[derive(Debug, PartialEq)]
struct Point {
    x: i32,
    y: i32
}

impl FromStr for Point {
    type Err = ParseIntError;

    fn from_str(s: &str) -> Result<Self, Self::Err> {
        let coords: Vec<&str> = s.trim_matches(|p| p == '(' || p == ')' )
                                 .split(",")
                                 .collect();

        let x_fromstr = coords[0].parse::<i32>()?;
        let y_fromstr = coords[1].parse::<i32>()?;

        Ok(Point { x: x_fromstr, y: y_fromstr })
    }
}

let p = Point::from_str("(1,2)");
assert_eq!(p.unwrap(), Point{ x: 1, y: 2} )

Associated Types

type Err

The associated error which can be returned from parsing.

Required Methods

fn from_str(s: &str) -> Result<Self, Self::Err>

Parses a string s to return a value of this type.

If parsing succeeds, return the value inside Ok, otherwise when the string is ill-formatted return an error specific to the inside Err. The error type is specific to implementation of the trait.

Examples

Basic usage with i32, a type that implements FromStr:

use std::str::FromStr;

let s = "5";
let x = i32::from_str(s).unwrap();

assert_eq!(5, x);

Implementations on Foreign Types

impl FromStr for SocketAddrV4

type Err = AddrParseError

fn from_str(s: &str) -> Result<SocketAddrV4, AddrParseError>

impl FromStr for Ipv6Addr

type Err = AddrParseError

fn from_str(s: &str) -> Result<Ipv6Addr, AddrParseError>

impl FromStr for Ipv4Addr

type Err = AddrParseError

fn from_str(s: &str) -> Result<Ipv4Addr, AddrParseError>

impl FromStr for SocketAddr

type Err = AddrParseError

fn from_str(s: &str) -> Result<SocketAddr, AddrParseError>

impl FromStr for IpAddr

type Err = AddrParseError

fn from_str(s: &str) -> Result<IpAddr, AddrParseError>

impl FromStr for SocketAddrV6

type Err = AddrParseError

fn from_str(s: &str) -> Result<SocketAddrV6, AddrParseError>

impl FromStr for u8

type Err = ParseIntError

fn from_str(src: &str) -> Result<u8, ParseIntError>

impl FromStr for u64

type Err = ParseIntError

fn from_str(src: &str) -> Result<u64, ParseIntError>

impl FromStr for i32

type Err = ParseIntError

fn from_str(src: &str) -> Result<i32, ParseIntError>

impl FromStr for u32

type Err = ParseIntError

fn from_str(src: &str) -> Result<u32, ParseIntError>

impl FromStr for i16

type Err = ParseIntError

fn from_str(src: &str) -> Result<i16, ParseIntError>

impl FromStr for bool

type Err = ParseBoolError

fn from_str(s: &str) -> Result<bool, ParseBoolError>

Parse a bool from a string.

Yields a Result<bool, ParseBoolError>, because s may or may not actually be parseable.

Examples

use std::str::FromStr;

assert_eq!(FromStr::from_str("true"), Ok(true));
assert_eq!(FromStr::from_str("false"), Ok(false));
assert!(<bool as FromStr>::from_str("not even a boolean").is_err());

Note, in many cases, the .parse() method on str is more proper.

assert_eq!("true".parse(), Ok(true));
assert_eq!("false".parse(), Ok(false));
assert!("not even a boolean".parse::<bool>().is_err());

impl FromStr for i8

type Err = ParseIntError

fn from_str(src: &str) -> Result<i8, ParseIntError>

impl FromStr for usize

type Err = ParseIntError

fn from_str(src: &str) -> Result<usize, ParseIntError>

impl FromStr for f64

type Err = ParseFloatError

fn from_str(src: &str) -> Result<f64, ParseFloatError>

Converts a string in base 10 to a float. Accepts an optional decimal exponent.

This function accepts strings such as

• '3.14'
• '-3.14'
• '2.5E10', or equivalently, '2.5e10'
• '2.5E-10'
• '5.'
• '.5', or, equivalently, '0.5'
• 'inf', '-inf', 'NaN'

Leading and trailing whitespace represent an error.

Arguments

• src - A string

Return value

Err(ParseFloatError) if the string did not represent a valid number. Otherwise, Ok(n) where n is the floating-point number represented by src.

impl FromStr for f32

type Err = ParseFloatError

fn from_str(src: &str) -> Result<f32, ParseFloatError>

Converts a string in base 10 to a float. Accepts an optional decimal exponent.

This function accepts strings such as

• '3.14'
• '-3.14'
• '2.5E10', or equivalently, '2.5e10'
• '2.5E-10'
• '5.'
• '.5', or, equivalently, '0.5'
• 'inf', '-inf', 'NaN'

Leading and trailing whitespace represent an error.

Arguments

• src - A string

Return value

Err(ParseFloatError) if the string did not represent a valid number. Otherwise, Ok(n) where n is the floating-point number represented by src.

impl FromStr for u128

type Err = ParseIntError

fn from_str(src: &str) -> Result<u128, ParseIntError>

impl FromStr for i128

type Err = ParseIntError

fn from_str(src: &str) -> Result<i128, ParseIntError>

impl FromStr for isize

type Err = ParseIntError

fn from_str(src: &str) -> Result<isize, ParseIntError>

impl FromStr for char

type Err = ParseCharError

fn from_str(s: &str) -> Result<char, <char as FromStr>::Err>

impl FromStr for i64

type Err = ParseIntError

fn from_str(src: &str) -> Result<i64, ParseIntError>

impl FromStr for u16

type Err = ParseIntError

fn from_str(src: &str) -> Result<u16, ParseIntError>

impl FromStr for String

type Err = ParseError

fn from_str(s: &str) -> Result<String, ParseError>

impl FromStr for Level

type Err = ParseLevelError

fn from_str(level: &str) -> Result<Level, <Level as FromStr>::Err>

impl FromStr for LevelFilter

type Err = ParseLevelError

fn from_str(level: &str) -> Result<LevelFilter, <LevelFilter as FromStr>::Err>

impl FromStr for HeaderValue

type Err = InvalidHeaderValue

fn from_str(s: &str) -> Result<HeaderValue, <HeaderValue as FromStr>::Err>

impl FromStr for Scheme

type Err = InvalidUri

fn from_str(s: &str) -> Result<Scheme, <Scheme as FromStr>::Err>

impl FromStr for HeaderName

type Err = InvalidHeaderName

fn from_str(s: &str) -> Result<HeaderName, InvalidHeaderName>

impl FromStr for StatusCode

type Err = InvalidStatusCode

fn from_str(s: &str) -> Result<StatusCode, InvalidStatusCode>

impl FromStr for Method

type Err = InvalidMethod

fn from_str(t: &str) -> Result<Method, <Method as FromStr>::Err>

impl FromStr for Authority

type Err = InvalidUri

fn from_str(s: &str) -> Result<Authority, InvalidUri>

impl FromStr for Uri

type Err = InvalidUri

fn from_str(s: &str) -> Result<Uri, InvalidUri>

impl FromStr for PathAndQuery

type Err = InvalidUri

fn from_str(s: &str) -> Result<PathAndQuery, InvalidUri>

impl FromStr for BigUint

type Err = ParseBigIntError

fn from_str(s: &str) -> Result<BigUint, ParseBigIntError>

impl FromStr for BigInt

type Err = ParseBigIntError

fn from_str(s: &str) -> Result<BigInt, ParseBigIntError>

impl<T> FromStr for Complex<T> where     T: FromStr + Num + Clone,

type Err = ParseComplexError<<T as FromStr>::Err>

fn from_str(s: &str) -> Result<Complex<T>, <Complex<T> as FromStr>::Err>

Parses a +/- bi; ai +/- b; a; or bi where a and b are of type T

impl<T> FromStr for Ratio<T> where     T: Clone + FromStr + Integer,

type Err = ParseRatioError

fn from_str(s: &str) -> Result<Ratio<T>, ParseRatioError>

Parses numer/denom or just numer.

impl FromStr for Value

type Err = Error

fn from_str(s: &str) -> Result<Value, Error>

impl FromStr for Number

type Err = Error

fn from_str(s: &str) -> Result<Number, <Number as FromStr>::Err>

impl FromStr for Url

Parse a string as an URL, without a base URL or encoding override.

type Err = ParseError

fn from_str(input: &str) -> Result<Url, ParseError>

impl FromStr for DateTime<Utc>

type Err = ParseError

fn from_str(s: &str) -> Result<DateTime<Utc>, ParseError>

impl FromStr for NaiveTime

Parsing a str into a NaiveTime uses the same format, %H:%M:%S%.f, as in Debug and Display.

Example

use chrono::NaiveTime;

let t = NaiveTime::from_hms(23, 56, 4);
assert_eq!("23:56:04".parse::<NaiveTime>(), Ok(t));

let t = NaiveTime::from_hms_nano(23, 56, 4, 12_345_678);
assert_eq!("23:56:4.012345678".parse::<NaiveTime>(), Ok(t));

let t = NaiveTime::from_hms_nano(23, 59, 59, 1_234_567_890); // leap second
assert_eq!("23:59:60.23456789".parse::<NaiveTime>(), Ok(t));

assert!("foo".parse::<NaiveTime>().is_err());

type Err = ParseError

fn from_str(s: &str) -> Result<NaiveTime, ParseError>

impl FromStr for Weekday

Parsing a str into a Weekday uses the format %W.

Example

use chrono::Weekday;

assert_eq!("Sunday".parse::<Weekday>(), Ok(Weekday::Sun));
assert!("any day".parse::<Weekday>().is_err());

The parsing is case-insensitive.

assert_eq!("mON".parse::<Weekday>(), Ok(Weekday::Mon));

Only the shortest form (e.g. sun) and the longest form (e.g. sunday) is accepted.

assert!("thurs".parse::<Weekday>().is_err());

type Err = ParseWeekdayError

fn from_str(s: &str) -> Result<Weekday, <Weekday as FromStr>::Err>

impl FromStr for DateTime<FixedOffset>

type Err = ParseError

fn from_str(s: &str) -> Result<DateTime<FixedOffset>, ParseError>

impl FromStr for NaiveDate

Parsing a str into a NaiveDate uses the same format, %Y-%m-%d, as in Debug and Display.

Example

use chrono::NaiveDate;

let d = NaiveDate::from_ymd(2015, 9, 18);
assert_eq!("2015-09-18".parse::<NaiveDate>(), Ok(d));

let d = NaiveDate::from_ymd(12345, 6, 7);
assert_eq!("+12345-6-7".parse::<NaiveDate>(), Ok(d));

assert!("foo".parse::<NaiveDate>().is_err());

type Err = ParseError

fn from_str(s: &str) -> Result<NaiveDate, ParseError>

impl FromStr for DateTime<Local>

type Err = ParseError

fn from_str(s: &str) -> Result<DateTime<Local>, ParseError>

impl FromStr for NaiveDateTime

Parsing a str into a NaiveDateTime uses the same format, %Y-%m-%dT%H:%M:%S%.f, as in Debug.

Example

use chrono::{NaiveDateTime, NaiveDate};

let dt = NaiveDate::from_ymd(2015, 9, 18).and_hms(23, 56, 4);
assert_eq!("2015-09-18T23:56:04".parse::<NaiveDateTime>(), Ok(dt));

let dt = NaiveDate::from_ymd(12345, 6, 7).and_hms_milli(7, 59, 59, 1_500); // leap second
assert_eq!("+12345-6-7T7:59:60.5".parse::<NaiveDateTime>(), Ok(dt));

assert!("foo".parse::<NaiveDateTime>().is_err());

type Err = ParseError

fn from_str(s: &str) -> Result<NaiveDateTime, ParseError>

impl FromStr for Regex

type Err = Error

fn from_str(s: &str) -> Result<Regex, Error>

Attempts to parse a string into a regular expression

impl FromStr for Regex

type Err = Error

fn from_str(s: &str) -> Result<Regex, Error>

Attempts to parse a string into a regular expression

Implementors

• impl FromStr for Identifier type Err = MessageBirdError;

• impl FromStr for Direction type Err = MessageBirdError;

• impl FromStr for Gateway type Err = MessageBirdError;

• impl FromStr for TelephoneNumber type Err = MessageBirdError;

• impl FromStr for AlphaNumeric type Err = MessageBirdError;

• impl FromStr for Originator type Err = MessageBirdError;

• impl FromStr for PayloadType type Err = MessageBirdError;

• impl FromStr for Payload type Err = MessageBirdError;

• impl FromStr for Msisdn type Err = MessageBirdError;

• impl FromStr for Status type Err = MessageBirdError;

• impl FromStr for AccessKey type Err = MessageBirdError;

• impl FromStr for QueryRecipient type Err = MessageBirdError;