stak_vm/
error.rs

1use core::{
2    error,
3    fmt::{self, Debug, Display, Formatter},
4};
5
6/// An error of a virtual machine.
7#[derive(Clone, Debug, Eq, PartialEq)]
8pub enum Error {
9    /// Mismatched numbers of call arguments and procedure parameters.
10    ArgumentCount,
11    /// A cons expected.
12    ConsExpected,
13    /// An unexpected end of bytecodes.
14    BytecodeEnd,
15    /// An illegal instruction detected.
16    IllegalInstruction,
17    /// An illegal primitive detected.
18    IllegalPrimitive,
19    /// A number expected.
20    NumberExpected,
21    /// Out of memory.
22    OutOfMemory,
23    /// A procedure expected.
24    ProcedureExpected,
25}
26
27impl error::Error for Error {}
28
29impl Display for Error {
30    fn fmt(&self, formatter: &mut Formatter) -> fmt::Result {
31        match self {
32            Self::ArgumentCount => write!(formatter, "invalid argument count"),
33            Self::BytecodeEnd => write!(formatter, "unexpected end of bytecodes"),
34            Self::ConsExpected => write!(formatter, "cons expected"),
35            Self::IllegalInstruction => write!(formatter, "illegal instruction"),
36            Self::IllegalPrimitive => write!(formatter, "illegal primitive"),
37            Self::NumberExpected => write!(formatter, "number expected"),
38            Self::OutOfMemory => write!(formatter, "out of memory"),
39            Self::ProcedureExpected => write!(formatter, "procedure expected"),
40        }
41    }
42}
stak_vm/error.rs

stak_vm/
error.rs
