Enum pir_8_emu::isa::instruction::ParseInstructionError

pub enum ParseInstructionError {
    InvalidCharacter(usize),
    EmptyString,
    UnrecognisedToken(usize, &'static [&'static str]),
    UnrecognisedRegisterLetter(usize, char, [char; 8]),
    MissingToken(usize, &'static [&'static str]),
    MissingRegisterLetter(usize, [char; 8]),
    TooManyTokens(usize),
}

An error that could've occurred when parsing an Instruction or an AluOperation.

Examples

let res = Instruction::from_str("LOAD IND Q", &registers);
assert_eq!(res,
           Err(ParseInstructionError::UnrecognisedRegisterLetter(
               10, 'Q', ['F', 'S', 'X', 'Y', 'A', 'B', 'C', 'D'])));

assert_eq!(format!("\nLOAD IND Q\n{}\n", res.unwrap_err()),
           "\nLOAD IND Q\n          ^ Register Q not found; expected: F, S, X, Y, A, B, C, D\n");
/*
           "
LOAD IND Q
         ^ Register Q not found; expected: F, S, X, Y, A, B, C, D
");
*/

let res = Instruction::from_str("   PORT", &registers);
assert_eq!(res, Err(ParseInstructionError::MissingToken(8, &["IN", "OUT"])));

assert_eq!(format!("\n   PORT\n{}\n", res.unwrap_err()),
           "\n   PORT\nIN, OUT ^ <- expected: Missing token\n");
/*
           "
   PORT
IN, OUT ^ <- expected: Missing token
");
*/

Variants

InvalidCharacter(usize)

An invalid (non-ASCII/vertical-WS) character was found in the input string

EmptyString

The string to be parsed contained no tokens

UnrecognisedToken(usize, &'static [&'static str])

A token was specified that doesn't fit in the place it was used

UnrecognisedRegisterLetter(usize, char, [char; 8])

The specified register letter was specified but no register with that letter exists

MissingToken(usize, &'static [&'static str])

A token was not specified, but one was required in that place

MissingRegisterLetter(usize, [char; 8])

A register name was not specified, but one was required in that place

TooManyTokens(usize)

A token was specified after a successful parse

Trait Implementations

impl Clone for ParseInstructionError

fn clone(&self) -> ParseInstructionError

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for ParseInstructionError

impl Debug for ParseInstructionError

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.

impl Display for ParseInstructionError

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.

impl Eq for ParseInstructionError

impl Error for ParseInstructionError

fn source(&self) -> Option<&(dyn Error + 'static)>

The lower-level source of this error, if any.

fn backtrace(&self) -> Option<&Backtrace>

🔬 This is a nightly-only experimental API. (backtrace)

Returns a stack backtrace, if available, of where this error occurred.

fn description(&self) -> &str

Deprecated since 1.42.0:

use the Display impl or to_string()

if let Err(e) = "xc".parse::<u32>() { // Print e itself, no need for description(). eprintln!("Error: {}", e); }

fn cause(&self) -> Option<&dyn Error>

Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

impl Hash for ParseInstructionError

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given [Hasher].

fn hash_slice<H>(data: &[Self], state: &mut H) where
    H: Hasher, 

Feeds a slice of this type into the given [Hasher].

impl Ord for ParseInstructionError

fn cmp(&self, other: &ParseInstructionError) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

🔬 This is a nightly-only experimental API. (clamp)

Restrict a value to a certain interval.

impl PartialEq<ParseInstructionError> for ParseInstructionError

fn eq(&self, other: &ParseInstructionError) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &ParseInstructionError) -> bool

This method tests for !=.

impl PartialOrd<ParseInstructionError> for ParseInstructionError

fn partial_cmp(&self, other: &ParseInstructionError) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &ParseInstructionError) -> bool

This method tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &ParseInstructionError) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &ParseInstructionError) -> bool

This method tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &ParseInstructionError) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl StructuralEq for ParseInstructionError

impl StructuralPartialEq for ParseInstructionError