Struct Env 

pub struct Env { /* private fields */ }

env: read-only access to the environment the host supplies.

The map is given to the constructor rather than read from the process, so a host decides exactly which variables a run can observe.

Implementations

impl Env

pub fn new(vars: BTreeMap<String, String>) -> Self

Builds an environment from the variables the host chooses to expose.

pub fn from_process() -> Self

Snapshots the real process environment. Explicit by design: nothing else in the runtime reads std::env.

Trait Implementations

impl HostApi for Env

fn module_schema(&self) -> ModuleSchema

The whole of what this module declares about itself: the name Cove source uses, the capability a host must grant for it, the operations it exposes, the types it declares, and the kinds of resource it can open.

fn call(&self, op: &str, args: Vec<Value>) -> Result<Value, RuntimeError>

Invokes one operation.

fn call_with( &self, op: &str, args: Vec<Value>, back: &mut dyn Reentry, ) -> Result<Value, RuntimeError>

Invokes one operation.

fn call_resource( &self, handle: &ResourceHandle, op: &str, args: Vec<Value>, back: &mut dyn Reentry, ) -> Result<Value, RuntimeError>

Invokes one operation on a handle this module issued.