f70c6d5d48
This commit extracts Tag, Span, Text, as well as source-related debug facilities into a new crate called nu_source. This change is much bigger than one might have expected because the previous code relied heavily on implementing inherent methods on `Tagged<T>` and `Spanned<T>`, which is no longer possible. As a result, this change creates more concrete types instead of using `Tagged<T>`. One notable example: Tagged<Value> became Value, and Value became UntaggedValue. This change clarifies the intent of the code in many places, but it does make it a big change.
61 lines
1.4 KiB
Rust
61 lines
1.4 KiB
Rust
use crate::commands::WholeStreamCommand;
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use crate::data::base::Block;
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use crate::errors::ShellError;
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use crate::prelude::*;
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use log::trace;
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pub struct SkipWhile;
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#[derive(Deserialize)]
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pub struct SkipWhileArgs {
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condition: Block,
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}
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impl WholeStreamCommand for SkipWhile {
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fn name(&self) -> &str {
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"skip-while"
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}
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fn signature(&self) -> Signature {
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Signature::build("skip-while")
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.required(
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"condition",
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SyntaxShape::Block,
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"the condition that must be met to continue skipping",
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)
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.filter()
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}
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fn usage(&self) -> &str {
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"Skips rows while the condition matches."
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}
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fn run(
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&self,
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args: CommandArgs,
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registry: &CommandRegistry,
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) -> Result<OutputStream, ShellError> {
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args.process(registry, skip_while)?.run()
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}
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}
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pub fn skip_while(
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SkipWhileArgs { condition }: SkipWhileArgs,
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RunnableContext { input, .. }: RunnableContext,
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) -> Result<OutputStream, ShellError> {
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let objects = input.values.skip_while(move |item| {
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trace!("ITEM = {:?}", item);
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let result = condition.invoke(&item);
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trace!("RESULT = {:?}", result);
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let return_value = match result {
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Ok(ref v) if v.is_true() => true,
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_ => false,
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};
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futures::future::ready(return_value)
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});
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Ok(objects.from_input_stream())
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}
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