qrcode-rs 1.5.0

QR code encoder in Rust，Generate QR Code matrices and images in RAW, PNG and SVG formats.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47

//! Content parsing for QR payloads.
//!
//! Parsers that turn a decoded QR payload (the raw bytes a scanner recovers)
//! back into structured values. These are the symmetric decode-side counterpart
//! to the [`QrCode::for_wifi`](crate::QrCode::for_wifi),
//! [`QrCode::for_vcard`](crate::QrCode::for_vcard), and
//! [`QrCode::for_gs1`](crate::QrCode::for_gs1) constructors, which encode in
//! the opposite direction.
//!
//! Encoding is one-way — a [`QrCode`](crate::QrCode) does not retain its input
//! payload — so these parsers operate on a `&str`/`&[u8]` the caller supplies.

pub mod gs1;
pub mod vcard;
pub mod wifi;

use core::fmt::{Display, Error, Formatter};

/// Errors returned by the content parsers in this module.
///
/// Each parser returns `Result<T, ParseError>`. The enum is `#[non_exhaustive]`:
/// future versions may add variants, so external callers should match with a `_`
/// arm.
#[non_exhaustive]
#[derive(Debug, Clone, PartialEq, Eq)]
pub enum ParseError {
    /// The input did not match the expected wire format (e.g. missing the
    /// `WIFI:` prefix or the `BEGIN:VCARD` sentinel).
    InvalidFormat,
    /// A required field was missing. Carries the field name.
    MissingField(&'static str),
    /// A field was present but its value was invalid (e.g. an unrecognized
    /// WiFi security mode).
    InvalidValue,
}

impl Display for ParseError {
    fn fmt(&self, f: &mut Formatter) -> Result<(), Error> {
        match self {
            Self::InvalidFormat => f.write_str("invalid QR payload format"),
            Self::MissingField(name) => write!(f, "missing required field: {name}"),
            Self::InvalidValue => f.write_str("invalid field value"),
        }
    }
}

impl ::core::error::Error for ParseError {}