feat(tvix/eval): implement boolean inversion operator
Change-Id: Icb1d449fdee4d67b5f1eefdbc01baa1584ea0a67 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6079 Tested-by: BuildkiteCI Autosubmit: tazjin <tazjin@tvl.su> Reviewed-by: grfn <grfn@gws.fyi>
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2 changed files with 17 additions and 1 deletions
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@ -1,6 +1,8 @@
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//! This module implements the backing representation of runtime
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//! values in the Nix language.
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use crate::errors::{Error, EvalResult};
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#[derive(Clone, Copy, Debug, PartialEq)]
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pub enum Value {
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Null,
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@ -26,6 +28,16 @@ impl Value {
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Value::Float(_) => "float",
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}
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}
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pub fn as_bool(self) -> EvalResult<bool> {
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match self {
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Value::Bool(b) => Ok(b),
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other => Err(Error::TypeError {
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expected: "bool",
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actual: other.type_of(),
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}),
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}
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}
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}
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#[derive(Clone, Copy, Debug, PartialEq)]
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@ -81,6 +81,11 @@ impl VM {
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NumberPair::Integer(i1, i2) => self.push(Value::Integer(i1 / i2)),
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},
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OpCode::OpInvert => {
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let v = self.pop().as_bool()?;
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self.push(Value::Bool(!v));
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}
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OpCode::OpNegate => match self.pop() {
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Value::Integer(i) => self.push(Value::Integer(-i)),
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Value::Float(f) => self.push(Value::Float(-f)),
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@ -106,7 +111,6 @@ impl VM {
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self.push(Value::Bool(eq))
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}
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OpCode::OpInvert => todo!("invert"),
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OpCode::OpNull => todo!("null"),
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OpCode::OpTrue => todo!("true"),
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OpCode::OpFalse => todo!("false"),
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