Struct QrCodeBuilder 

pub struct QrCodeBuilder<D: AsRef<[u8]>> { /* private fields */ }

A builder for QrCode, offering ergonomic, chainable configuration.

Construct one with QrCode::builder. The builder delegates to the existing constructors, so its output is identical to calling them directly.

Implementations

impl<D: AsRef<[u8]>> QrCodeBuilder<D>

pub fn ec_level(self, ec_level: EcLevel) -> Self

Sets the error correction level (default EcLevel::M).

pub fn version(self, version: Version) -> Self

Pins a specific QR Version. When set, build() behaves like QrCode::with_version. If micro is also set, the explicit version takes precedence.

pub fn micro(self, yes: bool) -> Self

Requests a Micro QR code (the smallest fitting Micro version), behaving like QrCode::micro_with_error_correction_level when no explicit version is set.

pub fn encoding_mode(self, mode: Mode) -> Self

Hints the encoding Mode (e.g. Mode::Byte), bypassing automatic mode optimization. When a version is also set it is used directly; otherwise the smallest fitting version for that mode is auto-selected.

The data must be encodable in the chosen mode: Mode::Kanji validates its Shift-JIS pairs and Mode::Byte accepts anything, but Mode::Numeric / Mode::Alphanumeric assume their input already matches (as automatic optimization would never select them otherwise).

pub fn force_mode(self, mode: Mode) -> Self

Forces a specific encoding Mode, bypassing automatic optimization. This is an alias for encoding_mode, provided for familiarity with the QR-code vocabulary.

pub fn build(self) -> QrResult<QrCode>

Builds the QrCode.

Errors

Propagates any QrError from the underlying encoder (e.g. data too long, or an incompatible version / error-correction combination).

Trait Implementations

impl<D: Clone + AsRef<[u8]>> Clone for QrCodeBuilder<D>

fn clone(&self) -> QrCodeBuilder<D>

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<D: Debug + AsRef<[u8]>> Debug for QrCodeBuilder<D>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.