Crate nu_engine

This crate primarily drives the evaluation of expressions.

(Some overlap with nu-protocol)

• Provides CallExt

Internal Nushell crate

This crate implements components of Nushell and is not designed to support plugin authors or other users directly.

Re-exports

pub use column::get_columns;

pub use documentation::get_full_help;

pub use env::*;

Modules

column

command_prelude

documentation

env

scope

Structs

ClosureEval

ClosureEval is used to repeatedly evaluate a closure with different values/inputs.

ClosureEvalOnce

ClosureEvalOnce is used to evaluate a closure a single time.

Traits

CallExt

Functions

compile

Compile Nushell pipeline abstract syntax tree (AST) to internal representation (IR) instructions for evaluation.

eval_block

eval_block_with_early_return

eval_call

eval_expression

eval_expression_with_input

Checks the expression to see if it’s a internal or external call. If so, passes the input into the call and gets out the result Otherwise, invokes the expression

eval_ir_block

Evaluate the compiled representation of a Block.

eval_subexpression

eval_variable

get_eval_block

Helper function to fetch eval_block() with the correct type parameter based on whether engine_state is configured with or without a debugger.

get_eval_block_with_early_return

Helper function to fetch eval_block_with_early_return() with the correct type parameter based on whether engine_state is configured with or without a debugger.

get_eval_expression

Helper function to fetch eval_expression() with the correct type parameter based on whether engine_state is configured with or without a debugger.

get_eval_expression_with_input

Helper function to fetch eval_expression_with_input() with the correct type parameter based on whether engine_state is configured with or without a debugger.

get_eval_ir_block

Helper function to fetch eval_ir_block() with the correct type parameter based on whether engine_state is configured with or without a debugger.

get_eval_subexpression

Helper function to fetch eval_subexpression() with the correct type parameter based on whether engine_state is configured with or without a debugger.

glob_from

This function is like nu_glob::glob from the glob crate, except it is relative to a given cwd.

redirect_env

Redirect the environment from callee to the caller.

Type Aliases

EvalBlockFn

Type of eval_block() function

EvalBlockWithEarlyReturnFn

Type of eval_block_with_early_return() function

EvalExpressionFn

Type of eval_expression() function

EvalExpressionWithInputFn

Type of eval_expression_with_input() function

EvalIrBlockFn

Type of eval_ir_block() function

EvalSubexpressionFn

Type of eval_subexpression() function