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expr: short-circuit evaluation for |

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This commit is contained in:
Zhuoxun Yang 2023-10-06 23:50:22 +08:00
parent fa2a14ccd2
commit 2c2e01205c
1 changed files with 17 additions and 1 deletions
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18
src/uu/expr/src/syntax_tree.rs
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@ -155,8 +155,24 @@ impl AstNode {
} }
} }
pub fn operand_values(&self) -> Result<Vec<String>, String> { pub fn operand_values(&self) -> Result<Vec<String>, String> {
if let Self::Node { operands, .. } = self { if let Self::Node {
operands, op_type, ..
} = self
{
let mut out = Vec::with_capacity(operands.len()); let mut out = Vec::with_capacity(operands.len());
let mut operands = operands.iter();
if op_type == "|" {
if let Some(value) = operands.next() {
let value = value.evaluate()?;
out.push(value.clone());
if value_as_bool(&value) {
out.push(String::from("dummy"));
return Ok(out);
}
}
}
for operand in operands { for operand in operands {
let value = operand.evaluate()?; let value = operand.evaluate()?;
out.push(value); out.push(value);