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Require block params (#4505)

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* Require block params

* Improve errors
This commit is contained in:
JT
2022-02-17 06:40:24 -05:00
committed by GitHub
parent f169a9be3b
commit 6e733f49bc
27 changed files with 149 additions and 102 deletions
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2
crates/nu-command/src/core_commands/tutor.rs
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@ -303,7 +303,7 @@ The `each` command gives us a way of working with each individual row or
element of a list one at a time. It reads these in from the pipeline and
runs a block on each element. A block is a group of pipelines.
```
echo 1 2 3 | each { $it + 10}
echo 1 2 3 | each { |it| $it + 10}
```
This example iterates over each element sent by `echo`, giving us three new
values that are the original value + 10. Here, the `$it` is a variable that

2
crates/nu-command/src/filters/each.rs
View File

@ -46,7 +46,7 @@ impl Command for Each {
];
vec![Example {
example: "[1 2 3] | each { 2 * $it }",
example: "[1 2 3] | each { |it| 2 * $it }",
description: "Multiplies elements in list",
result: Some(Value::List {
vals: stream_test_1,

2
crates/nu-command/src/filters/each_group.rs
View File

@ -42,7 +42,7 @@ impl Command for EachGroup {
];
vec![Example {
example: "echo [1 2 3 4] | each group 2 { $it.0 + $it.1 }",
example: "echo [1 2 3 4] | each group 2 { |it| $it.0 + $it.1 }",
description: "Echo the sum of each pair",
result: Some(Value::List {
vals: stream_test_1,

2
crates/nu-command/src/filters/each_window.rs
View File

@ -68,7 +68,7 @@ impl Command for EachWindow {
vec![
Example {
example: "echo [1 2 3 4] | each window 2 { $it.0 + $it.1 }",
example: "echo [1 2 3 4] | each window 2 { |it| $it.0 + $it.1 }",
description: "A sliding window of two elements",
result: Some(Value::List {
vals: stream_test_1,

2
crates/nu-command/src/filters/empty.rs
View File

@ -72,7 +72,7 @@ impl Command for Empty {
},
Example {
description: "use a block if setting the empty cell contents is wanted",
example: "[[2020/04/16 2020/07/10 2020/11/16]; ['' [27] [37]]] | empty? 2020/04/16 -b { [33 37] }",
example: "[[2020/04/16 2020/07/10 2020/11/16]; ['' [27] [37]]] | empty? 2020/04/16 -b { |_| [33 37] }",
result: Some(
Value::List {
vals: vec![

4
crates/nu-command/src/filters/find.rs
View File

@ -60,7 +60,7 @@ impl Command for Find {
},
Example {
description: "Find the first odd value",
example: "echo [2 4 3 6 5 8] | find --predicate { ($it mod 2) == 1 }",
example: "echo [2 4 3 6 5 8] | find --predicate { |it| ($it mod 2) == 1 }",
result: Some(Value::List {
vals: vec![Value::test_int(3), Value::test_int(5)],
span: Span::test_data()
@ -68,7 +68,7 @@ impl Command for Find {
},
Example {
description: "Find if a service is not running",
example: "echo [[version patch]; [0.1.0 $false] [0.1.1 $true] [0.2.0 $false]] | find -p { $it.patch }",
example: "echo [[version patch]; [0.1.0 $false] [0.1.1 $true] [0.2.0 $false]] | find -p { |it| $it.patch }",
result: Some(Value::List {
vals: vec![Value::test_record(
vec!["version", "patch"],

2
crates/nu-command/src/filters/par_each.rs
View File

@ -32,7 +32,7 @@ impl Command for ParEach {
fn examples(&self) -> Vec<Example> {
vec![Example {
example: "[1 2 3] | par-each { 2 * $it }",
example: "[1 2 3] | par-each { |it| 2 * $it }",
description: "Multiplies elements in list",
result: None,
}]

32
crates/nu-command/src/filters/reduce.rs
View File

@ -24,7 +24,7 @@ impl Command for Reduce {
)
.required(
"block",
SyntaxShape::Block(Some(vec![SyntaxShape::Any])),
SyntaxShape::Block(Some(vec![SyntaxShape::Any, SyntaxShape::Any])),
"reducing function",
)
.switch("numbered", "iterate with an index", Some('n'))
@ -37,7 +37,7 @@ impl Command for Reduce {
fn examples(&self) -> Vec<Example> {
vec![
Example {
example: "[ 1 2 3 4 ] | reduce { $it.acc + $it.item }",
example: "[ 1 2 3 4 ] | reduce {|it, acc| $it + $acc }",
description: "Sum values of a list (same as 'math sum')",
result: Some(Value::Int {
val: 10,
@ -45,7 +45,7 @@ impl Command for Reduce {
}),
},
Example {
example: "[ 1 2 3 4 ] | reduce -f 10 { $it.acc + $it.item }",
example: "[ 1 2 3 4 ] | reduce -f 10 {|it, acc| $acc + $it }",
description: "Sum values with a starting value (fold)",
result: Some(Value::Int {
val: 20,
@ -53,7 +53,7 @@ impl Command for Reduce {
}),
},
Example {
example: r#"[ i o t ] | reduce -f "Arthur, King of the Britons" { $it.acc | str find-replace -a $it.item "X" }"#,
example: r#"[ i o t ] | reduce -f "Arthur, King of the Britons" {|it, acc| $acc | str find-replace -a $it "X" }"#,
description: "Replace selected characters in a string with 'X'",
result: Some(Value::String {
val: "ArXhur, KXng Xf Xhe BrXXXns".to_string(),
@ -61,11 +61,11 @@ impl Command for Reduce {
}),
},
Example {
example: r#"[ one longest three bar ] | reduce -n {
if ($it.item | str length) > ($it.acc | str length) {
example: r#"[ one longest three bar ] | reduce -n { |it, acc|
if ($it.item | str length) > ($acc | str length) {
$it.item
} else {
$it.acc
$acc
}
}"#,
description: "Find the longest string and its index",
@ -147,32 +147,28 @@ impl Command for Reduce {
if let Some(var_id) = &var.var_id {
let it = if numbered {
Value::Record {
cols: vec![
"index".to_string(),
"acc".to_string(),
"item".to_string(),
],
cols: vec!["index".to_string(), "item".to_string()],
vals: vec![
Value::Int {
val: idx as i64 + off,
span,
},
acc,
x,
],
span,
}
} else {
Value::Record {
cols: vec!["acc".to_string(), "item".to_string()],
vals: vec![acc, x],
span,
}
x
};
stack.add_var(*var_id, it);
}
}
if let Some(var) = block.signature.get_positional(1) {
if let Some(var_id) = &var.var_id {
stack.add_var(*var_id, acc);
}
}
let v = match eval_block(engine_state, &mut stack, block, PipelineData::new(span)) {
Ok(v) => v.into_value(span),