Struct embed_nu::Context

pub struct Context { /* private fields */ }

Represents the evaluation context of nu scripts and commands This context is the state of the engine itself plus the stack It stores variables on

Implementations

impl Context

pub fn builder() -> ContextBuilder

pub fn eval_block( &mut self, block: &Block, input: PipelineData ) -> Result<PipelineData, CrateError>

Evaluates the given block with the current engine context (stack plus engine state)

pub fn eval_raw<S: ToString>( &mut self, contents: S, input: PipelineData ) -> Result<PipelineData, CrateError>

Evals nu script as string with the current engine context

pub fn get_var<S: AsRef<str>>(&self, name: S) -> Option<Value>

Returns a variable defined in the stack

pub fn has_fn<S: AsRef<str>>(&mut self, name: S) -> bool

Returns if the given function exists in the context

pub fn call_fn<S: AsRef<str>, I: IntoIterator<Item = A>, A: IntoArgument>( &mut self, name: S, args: I ) -> Result<PipelineData, CrateError>

Calls a function by the given name Errs if the function doesn’t exist

pub fn print_pipeline( &mut self, pipeline: PipelineData ) -> Result<(), CrateError>

Prints the data of the given pipeline to stdout

pub fn print_pipeline_stderr( &mut self, pipeline: PipelineData ) -> Result<(), CrateError>

Prints the data of the given pipeline to stderr

pub fn add_var<S: ToString, V: IntoValue>( &mut self, name: S, value: V ) -> Result<(), CrateError>

Adds a variable to the context

Trait Implementations

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.