Enum evaltrees::repl::ReplCommand

pub enum ReplCommand {
    Decl(CstDecl),
    Evaluator(fn(_: Vec<Decl<()>>) -> Box<Evaluator>),
    Expr(Expr),
    Help,
    List,
    PrintStyle(PrintStyle),
    Quit,
    Reset,
    Typeof(Expr),
}

A command entered at the REPL.

Variants

Decl(CstDecl)

Adds a new declaration.

Evaluator(fn(_: Vec<Decl<()>>) -> Box<Evaluator>)

Sets the function used to construct an evaluator.

Expr(Expr)

Evaluates an expression.

Help

Prints a help menu.

List

Lists all declarations.

PrintStyle(PrintStyle)

Changes the print style.

Quit

Quits the REPL.

Reset

Clears all declarations from the REPL.

Typeof(Expr)

Gets the type of an expression.

Methods

impl ReplCommand

pub fn help() -> &'static str

Returns a help message for the commands.

Trait Implementations

impl FromStr for ReplCommand

type Err = ParseError<usize, String, &'static str>

The associated error which can be returned from parsing.

fn from_str(     s: &str ) -> Result<ReplCommand, ParseError<usize, String, &'static str>>

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

impl Clone for ReplCommand

fn clone(&self) -> ReplCommand

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for ReplCommand

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

Formats the value using the given formatter.

impl PartialEq for ReplCommand

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

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

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

This method tests for !=.