Enum ReplDriverSpec 

pub enum ReplDriverSpec {
    Line,
    Multiline,
    External {
        cmd: String,
    },
    Buffer {
        path: PathBuf,
        on: Symbol,
    },
    Unavailable {
        spec: Expr,
    },
}

Declarative description of a REPL line driver, resolved into a concrete LineDriver by DriverSpec::create_driver.

Variants

Line

Single-line stdio driver.

Multiline

Multi-line stdio driver.

External

External process driver invoking cmd.

Fields

cmd: String

Command line to spawn as the driver.

Buffer

Buffer-file driver reading from path.

Fields

path: PathBuf

Path to the buffer file.

on: Symbol

Symbol naming the trigger event (for example save).

Unavailable

A driver named in the spec but not built in; resolved from the registry at creation time or reported as unavailable.

Fields

spec: Expr

The original driver spec expression.

Implementations

impl DriverSpec

pub fn from_expr(expr: &Expr) -> Result<Self>

Parses a driver spec from expr: a driver symbol (line, multiline, …) or a (kind ...) option list. Returns an error for malformed specs.

pub fn as_expr(&self) -> Expr

Renders this spec back into its Expr form, the inverse of DriverSpec::from_expr.

pub fn create_driver(&self, cx: &mut Cx) -> Result<Box<dyn LineDriver>>

Builds the concrete LineDriver for this spec, consulting the driver registry for DriverSpec::Unavailable specs and erroring if none is found.

pub fn required_capabilities(&self) -> Vec<CapabilityName>

Returns the capabilities required to use this driver spec.

Trait Implementations

impl Clone for DriverSpec

fn clone(&self) -> DriverSpec

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DriverSpec

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

Formats the value using the given formatter.

impl Eq for DriverSpec

impl PartialEq for DriverSpec

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

Tests for self and other values to be equal, and is used by ==.

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

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

impl StructuralPartialEq for DriverSpec