forked from extern/nushell
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.
56 lines
1.3 KiB
Rust
56 lines
1.3 KiB
Rust
use crate::commands::WholeStreamCommand;
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use crate::data::base::reject_fields;
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use crate::errors::ShellError;
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use crate::prelude::*;
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use nu_source::Tagged;
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#[derive(Deserialize)]
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pub struct RejectArgs {
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rest: Vec<Tagged<String>>,
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}
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pub struct Reject;
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impl WholeStreamCommand for Reject {
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fn name(&self) -> &str {
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"reject"
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}
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fn signature(&self) -> Signature {
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Signature::build("reject").rest(SyntaxShape::Member, "the names of columns to remove")
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}
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fn usage(&self) -> &str {
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"Remove the given columns from the table."
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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, reject)?.run()
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}
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}
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fn reject(
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RejectArgs { rest: fields }: RejectArgs,
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RunnableContext { input, name, .. }: RunnableContext,
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) -> Result<OutputStream, ShellError> {
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if fields.len() == 0 {
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return Err(ShellError::labeled_error(
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"Reject requires fields",
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"needs parameter",
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name,
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));
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}
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let fields: Vec<_> = fields.iter().map(|f| f.item.clone()).collect();
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let stream = input
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.values
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.map(move |item| reject_fields(&item, &fields, &item.tag));
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Ok(stream.from_input_stream())
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}
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