79 lines
1.9 KiB
Rust
79 lines
1.9 KiB
Rust
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use std::fmt::{Debug, Display, Error, Formatter};
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use super::MpsOp;
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use super::RuntimeError;
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/// Mps operation where clones of it emulate the Display behaviour without cloning the data
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#[derive(Debug)]
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pub enum PseudoOp {
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Real(Box<dyn MpsOp>),
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Fake(String)
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}
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impl PseudoOp {
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pub fn try_real(&mut self) -> Result<&mut Box<dyn MpsOp>, RuntimeError> {
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match self {
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Self::Real(op) => Ok(op),
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Self::Fake(_) => Err(RuntimeError {
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line: 0,
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op: self.clone(),
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msg: "PseudoOp::Fake is not a real MpsOp".into(),
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})
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}
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}
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pub fn unwrap_real(self) -> Result<Box<dyn MpsOp>, RuntimeError> {
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match self {
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Self::Real(op) => {
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let result = Ok(op);
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result
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},
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Self::Fake(_) => Err(RuntimeError {
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line: 0,
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op: self.clone(),
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msg: "PseudoOp::Fake is not a real MpsOp".into(),
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})
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}
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}
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#[inline]
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pub fn is_real(&self) -> bool {
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match self {
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Self::Real(_) => true,
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_ => false,
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}
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}
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#[inline]
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pub fn is_fake(&self) -> bool {
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match self {
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Self::Fake(_) => true,
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_ => false,
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}
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}
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}
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impl Clone for PseudoOp {
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fn clone(&self) -> Self {
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match self {
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Self::Real(op) => Self::Fake(format!("{}", op)),
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Self::Fake(s) => Self::Fake(s.clone())
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}
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}
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}
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impl Display for PseudoOp {
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fn fmt(&self, f: &mut Formatter) -> Result<(), Error> {
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match self {
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Self::Real(op) => write!(f, "{}", op),
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Self::Fake(s) => write!(f, "{}", s)
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}
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}
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}
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impl std::convert::From<Box<dyn MpsOp>> for PseudoOp {
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fn from(item: Box<dyn MpsOp>) -> Self {
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Self::Real(item)
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}
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}
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