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Spread operator for list literals (#11006)

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This commit is contained in:
ysthakur
2023-11-22 16:10:08 -05:00
committed by GitHub
parent 95a745e622
commit 823e578c46
12 changed files with 149 additions and 13 deletions
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9
crates/nu-engine/src/eval.rs
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@ -538,7 +538,13 @@ pub fn eval_expression(
Expr::List(x) => {
let mut output = vec![];
for expr in x {
output.push(eval_expression(engine_state, stack, expr)?);
match &expr.expr {
Expr::Spread(expr) => match eval_expression(engine_state, stack, expr)? {
Value::List { mut vals, .. } => output.append(&mut vals),
_ => return Err(ShellError::CannotSpreadAsList { span: expr.span }),
},
_ => output.push(eval_expression(engine_state, stack, expr)?),
}
}
Ok(Value::list(output, expr.span))
}
@ -635,6 +641,7 @@ pub fn eval_expression(
Expr::Signature(_) => Ok(Value::nothing(expr.span)),
Expr::Garbage => Ok(Value::nothing(expr.span)),
Expr::Nothing => Ok(Value::nothing(expr.span)),
Expr::Spread(_) => Ok(Value::nothing(expr.span)), // Spread operator only occurs in lists
}
}