Enum expectrl::ControlCode

pub enum ControlCode {
    Null,
    StartOfHeading,
    StartOfText,
    EndOfText,
    EndOfTransmission,
    Enquiry,
    Acknowledge,
    Bell,
    Backspace,
    HorizontalTabulation,
    LineFeed,
    VerticalTabulation,
    FormFeed,
    CarriageReturn,
    ShiftOut,
    ShiftIn,
    DataLinkEscape,
    DeviceControl1,
    DeviceControl2,
    DeviceControl3,
    DeviceControl4,
    NegativeAcknowledge,
    SynchronousIdle,
    EndOfTransmissionBlock,
    Cancel,
    EndOfMedium,
    Substitute,
    Escape,
    FileSeparator,
    GroupSeparator,
    RecordSeparator,
    UnitSeparator,
    Space,
    Delete,
}

ControlCode represents the standard ASCII control codes wiki

Variants

Null

Often used as a string terminator, especially in the programming language C.

StartOfHeading

In message transmission, delimits the start of a message header.

StartOfText

First character of message text, and may be used to terminate the message heading.

EndOfText

Often used as a “break” character (Ctrl-C) to interrupt or terminate a program or process.

EndOfTransmission

Often used on Unix to indicate end-of-file on a terminal (Ctrl-D).

Enquiry

Signal intended to trigger a response at the receiving end, to see if it is still present.

Acknowledge

Response to an Enquiry, or an indication of successful receipt of a message.

Bell

Used for a beep on systems that didn’t have a physical bell.

Backspace

Move the cursor one position leftwards. On input, this may delete the character to the left of the cursor.

HorizontalTabulation

Position to the next character tab stop.

LineFeed

On Unix, used to mark end-of-line. In DOS, Windows, and various network standards, LF is used following CR as part of the end-of-line mark.

VerticalTabulation

Position the form at the next line tab stop.

FormFeed

It appears in some common plain text files as a page break character.

CarriageReturn

Originally used to move the cursor to column zero while staying on the same line.

ShiftOut

Switch to an alternative character set.

ShiftIn

Return to regular character set after ShiftOut.

DataLinkEscape

May cause a limited number of contiguously following octets to be interpreted in some different way.

DeviceControl1

A control code which is reserved for device control.

DeviceControl2

A control code which is reserved for device control.

DeviceControl3

A control code which is reserved for device control.

DeviceControl4

A control code which is reserved for device control.

NegativeAcknowledge

In multipoint systems, the NAK is used as the not-ready reply to a poll.

SynchronousIdle

Used in synchronous transmission systems to provide a signal from which synchronous correction may be achieved.

EndOfTransmissionBlock

Indicates the end of a transmission block of data.

Cancel

Indicates that the data preceding it are in error or are to be disregarded.

EndOfMedium

May mark the end of the used portion of the physical medium.

Substitute

Sometimes used to indicate the end of file, both when typing on the terminal and in text files stored on disk.

Escape

The Esc key on the keyboard will cause this character to be sent on most systems. In systems based on ISO/IEC 2022, even if another set of C0 control codes are used, this octet is required to always represent the escape character.

FileSeparator

Can be used as delimiters to mark fields of data structures. Also it used for hierarchical levels; FS == level 4

GroupSeparator

It used for hierarchical levels; GS == level 3

RecordSeparator

It used for hierarchical levels; RS == level 2

UnitSeparator

It used for hierarchical levels; US == level 1

Space

Space is a graphic character. It causes the active position to be advanced by one character position.

Delete

Usually called backspace on modern machines, and does not correspond to the PC delete key.

Implementations

impl ControlCode

pub const NUL: ControlCode = ControlCode::Null

See ControlCode::Null

pub const SOH: ControlCode = ControlCode::StartOfHeading

See ControlCode::StartOfHeading

pub const STX: ControlCode = ControlCode::StartOfText

See ControlCode::StartOfText

pub const ETX: ControlCode = ControlCode::EndOfText

See ControlCode::EndOfText

pub const EOT: ControlCode = ControlCode::EndOfTransmission

See ControlCode::EndOfTransmission

pub const ENQ: ControlCode = ControlCode::Enquiry

See ControlCode::Enquiry

pub const ACK: ControlCode = ControlCode::Acknowledge

See ControlCode::Acknowledge

pub const BEL: ControlCode = ControlCode::Bell

See ControlCode::Bell

pub const BS: ControlCode = ControlCode::Backspace

See ControlCode::Backspace

pub const HT: ControlCode = ControlCode::HorizontalTabulation

See ControlCode::HorizontalTabulation

pub const LF: ControlCode = ControlCode::LineFeed

See ControlCode::LineFeed

pub const VT: ControlCode = ControlCode::VerticalTabulation

See ControlCode::VerticalTabulation

pub const FF: ControlCode = ControlCode::FormFeed

See ControlCode::FormFeed

pub const CR: ControlCode = ControlCode::CarriageReturn

See ControlCode::CarriageReturn

pub const SO: ControlCode = ControlCode::ShiftOut

See ControlCode::ShiftOut

pub const SI: ControlCode = ControlCode::ShiftIn

See ControlCode::ShiftIn

pub const DLE: ControlCode = ControlCode::DataLinkEscape

See ControlCode::DataLinkEscape

pub const DC1: ControlCode = ControlCode::DeviceControl1

See ControlCode::DeviceControl1

pub const DC2: ControlCode = ControlCode::DeviceControl2

See ControlCode::DeviceControl2

pub const DC3: ControlCode = ControlCode::DeviceControl3

See ControlCode::DeviceControl3

pub const DC4: ControlCode = ControlCode::DeviceControl4

See ControlCode::DeviceControl4

pub const NAK: ControlCode = ControlCode::NegativeAcknowledge

See ControlCode::NegativeAcknowledge

pub const SYN: ControlCode = ControlCode::SynchronousIdle

See ControlCode::SynchronousIdle

pub const ETB: ControlCode = ControlCode::EndOfTransmissionBlock

See ControlCode::EndOfTransmissionBlock

pub const CAN: ControlCode = ControlCode::Cancel

See ControlCode::Cancel

pub const EM: ControlCode = ControlCode::EndOfMedium

See ControlCode::EndOfMedium

pub const SUB: ControlCode = ControlCode::Substitute

See ControlCode::Substitute

pub const ESC: ControlCode = ControlCode::Escape

See ControlCode::Escape

pub const FS: ControlCode = ControlCode::FileSeparator

See ControlCode::FileSeparator

pub const GS: ControlCode = ControlCode::GroupSeparator

See ControlCode::GroupSeparator

pub const RS: ControlCode = ControlCode::RecordSeparator

See ControlCode::RecordSeparator

pub const US: ControlCode = ControlCode::UnitSeparator

See ControlCode::UnitSeparator

pub const SP: ControlCode = ControlCode::Space

See ControlCode::Space

pub const DEL: ControlCode = ControlCode::Delete

See ControlCode::Delete

Trait Implementations

impl AsRef<[u8]> for ControlCode

fn as_ref(&self) -> &[u8]

Converts this type into a shared reference of the (usually inferred) input type.

impl AsRef<str> for ControlCode

fn as_ref(&self) -> &str

Converts this type into a shared reference of the (usually inferred) input type.

impl Clone for ControlCode

fn clone(&self) -> ControlCode

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for ControlCode

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

Formats the value using the given formatter.

impl From<ControlCode> for u8

fn from(val: ControlCode) -> Self

Converts to this type from the input type.

impl PartialEq<ControlCode> for ControlCode

fn eq(&self, other: &ControlCode) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl TryFrom<&str> for ControlCode

type Error = ()

The type returned in the event of a conversion error.

fn try_from(c: &str) -> Result<ControlCode, ()>

Performs the conversion.

impl TryFrom<char> for ControlCode

type Error = ()

The type returned in the event of a conversion error.

fn try_from(c: char) -> Result<ControlCode, ()>

Performs the conversion.

impl Copy for ControlCode

impl Eq for ControlCode

impl StructuralEq for ControlCode

impl StructuralPartialEq for ControlCode