Struct exonum::helpers::fabric::Context

pub struct Context { /* fields omitted */ }

Context is a type, used to keep some values from Command into CommandExtension and vice verse.

Methods

impl Context

fn arg<T: FromStr>(&self, key: &str) -> Result<T, Box<Error>> where
    <T as FromStr>::Err: Error + 'static, 

Gets value of the command line argument.

fn arg_multiple<T: FromStr>(&self, key: &str) -> Result<Vec<T>, Box<Error>> where
    <T as FromStr>::Err: Error + 'static, 

Gets multiple values of the command line argument.

fn get<'de, T: Deserialize<'de>>(&self, key: &str) -> Result<T, Box<Error>>

Gets the variable from the context.

fn set<T: Serialize>(&mut self, key: &'static str, value: T) -> Option<Value>

Sets the variable in the context and returns the previous value.

Panic

Panics if value could not be serialized as TOML.

Trait Implementations

impl PartialEq for Context

fn eq(&self, __arg_0: &Context) -> bool

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

fn ne(&self, __arg_0: &Context) -> bool

This method tests for !=.

impl Debug for Context

fn fmt(&self, __arg_0: &mut Formatter) -> Result

Formats the value using the given formatter.

impl Clone for Context

fn clone(&self) -> Context

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Default for Context

fn default() -> Context

Returns the "default value" for a type.