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Parser refactoring for improving pipelines (#7162)

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* Remove lite_parse file

* Add LiteElement to represent different pipeline elem types

* Add PipelineElement to Pipelines

* Remove lite_parse specific tests
This commit is contained in:
JT
2022-11-19 10:46:48 +13:00
committed by GitHub
parent bd30ea723e
commit 6454bf69aa
16 changed files with 1196 additions and 1099 deletions
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56
crates/nu-engine/src/eval.rs
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@ -3,7 +3,7 @@ use nu_path::expand_path_with;
use nu_protocol::{
ast::{
Assignment, Bits, Block, Boolean, Call, Comparison, Expr, Expression, Math, Operator,
PathMember,
PathMember, PipelineElement,
},
engine::{EngineState, Stack},
Config, HistoryFileFormat, IntoInterruptiblePipelineData, IntoPipelineData, ListStream,
@ -786,6 +786,50 @@ fn might_consume_external_result(input: PipelineData) -> (PipelineData, bool) {
}
}
pub fn eval_element_with_input(
engine_state: &EngineState,
stack: &mut Stack,
element: &PipelineElement,
input: PipelineData,
redirect_stdout: bool,
redirect_stderr: bool,
) -> Result<(PipelineData, bool), ShellError> {
match element {
PipelineElement::Expression(expr) => eval_expression_with_input(
engine_state,
stack,
expr,
input,
redirect_stdout,
redirect_stderr,
),
PipelineElement::Redirect(expr) => eval_expression_with_input(
engine_state,
stack,
expr,
input,
redirect_stdout,
redirect_stderr,
),
PipelineElement::And(expr) => eval_expression_with_input(
engine_state,
stack,
expr,
input,
redirect_stdout,
redirect_stderr,
),
PipelineElement::Or(expr) => eval_expression_with_input(
engine_state,
stack,
expr,
input,
redirect_stdout,
redirect_stderr,
),
}
}
pub fn eval_block(
engine_state: &EngineState,
stack: &mut Stack,
@ -796,14 +840,14 @@ pub fn eval_block(
) -> Result<PipelineData, ShellError> {
let num_pipelines = block.len();
for (pipeline_idx, pipeline) in block.pipelines.iter().enumerate() {
for (i, elem) in pipeline.expressions.iter().enumerate() {
for (i, elem) in pipeline.elements.iter().enumerate() {
// if eval internal command failed, it can just make early return with `Err(ShellError)`.
let eval_result = eval_expression_with_input(
let eval_result = eval_element_with_input(
engine_state,
stack,
elem,
input,
redirect_stdout || (i != pipeline.expressions.len() - 1),
redirect_stdout || (i != pipeline.elements.len() - 1),
redirect_stderr,
)?;
input = eval_result.0;
@ -901,8 +945,8 @@ pub fn eval_subexpression(
mut input: PipelineData,
) -> Result<PipelineData, ShellError> {
for pipeline in block.pipelines.iter() {
for expr in pipeline.expressions.iter() {
input = eval_expression_with_input(engine_state, stack, expr, input, true, false)?.0
for expr in pipeline.elements.iter() {
input = eval_element_with_input(engine_state, stack, expr, input, true, false)?.0
}
}