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Allow parse-time evaluation of calls, pipelines and subexpressions (#9499)

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Co-authored-by: Antoine Stevan <44101798+amtoine@users.noreply.github.com>
This commit is contained in:
Jakub Žádník
2023-08-26 16:41:29 +03:00
committed by GitHub
parent 3d73287ea4
commit 5ac5b90aed
37 changed files with 849 additions and 161 deletions
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35
crates/nu-command/src/strings/str_/length.rs
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@ -3,7 +3,7 @@ use nu_cmd_base::input_handler::{operate, CmdArgument};
use nu_engine::CallExt;
use nu_protocol::ast::Call;
use nu_protocol::ast::CellPath;
use nu_protocol::engine::{Command, EngineState, Stack};
use nu_protocol::engine::{Command, EngineState, Stack, StateWorkingSet};
use nu_protocol::Category;
use nu_protocol::{Example, PipelineData, ShellError, Signature, Span, SyntaxShape, Type, Value};
use unicode_segmentation::UnicodeSegmentation;
@ -62,6 +62,10 @@ impl Command for SubCommand {
vec!["size", "count"]
}
fn is_const(&self) -> bool {
true
}
fn run(
&self,
engine_state: &EngineState,
@ -70,11 +74,17 @@ impl Command for SubCommand {
input: PipelineData,
) -> Result<PipelineData, ShellError> {
let cell_paths: Vec<CellPath> = call.rest(engine_state, stack, 0)?;
let args = Arguments {
cell_paths: (!cell_paths.is_empty()).then_some(cell_paths),
graphemes: grapheme_flags(call)?,
};
operate(action, args, input, call.head, engine_state.ctrlc.clone())
run(cell_paths, engine_state, call, input)
}
fn run_const(
&self,
working_set: &StateWorkingSet,
call: &Call,
input: PipelineData,
) -> Result<PipelineData, ShellError> {
let cell_paths: Vec<CellPath> = call.rest_const(working_set, 0)?;
run(cell_paths, working_set.permanent(), call, input)
}
fn examples(&self) -> Vec<Example> {
@ -101,6 +111,19 @@ impl Command for SubCommand {
}
}
fn run(
cell_paths: Vec<CellPath>,
engine_state: &EngineState,
call: &Call,
input: PipelineData,
) -> Result<PipelineData, ShellError> {
let args = Arguments {
cell_paths: (!cell_paths.is_empty()).then_some(cell_paths),
graphemes: grapheme_flags(call)?,
};
operate(action, args, input, call.head, engine_state.ctrlc.clone())
}
fn action(input: &Value, arg: &Arguments, head: Span) -> Value {
match input {
Value::String { val, .. } => Value::int(