Struct Context

pub struct Context<M: ContextMarker> { /* private fields */ }

Context is Generic context container The context is a key-value store for environment values.

Implementations

impl<M: ContextMarker> Context<M>

pub fn get_for_env(&self, env: &EnvType) -> Option<M::Value>

Get the value for the current environment If no value is found, return the default value(optional)

pub fn try_get_for_env(&self, env: &EnvType) -> Result<M::Value, EnvError>

Try to get the value for the current environment If no value is found, return an error

Trait Implementations

impl<M: Clone + ContextMarker> Clone for Context<M>

where M::Value: Clone,

fn clone(&self) -> Context<M>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<M: ContextMarker> Default for Context<M>

Context implementation for ContextMarker

Example

use env_type::context::{ContextMarker, Context};
use env_type::types::EnvType;

struct TestContext;

impl ContextMarker for TestContext {
  type Value = String;
}

let mut context = Context::<TestContext>::default();
assert!(context.get_for_env(&EnvType::Dev).is_none());

fn default() -> Self

Returns the “default value” for a type.