Enum eval::Error

pub enum Error {
    UnsupportedOperator(String),
    CanNotExec(Operator),
    StartWithNonValueOperator,
    UnpairedBrackets,
    DuplicateValueNode,
    DuplicateOperatorNode,
    CommaNotWithFunction,
    BracketNotWithFunction,
    FunctionNotExists(String),
    ExpectedBoolean(Value),
    ExpectedIdentifier,
    ExpectedArray,
    ExpectedObject,
    ExpectedNumber,
    NoFinalNode,
    ArgumentsGreater(usize),
    ArgumentsLess(usize),
    UnsupportedTypes(String, String),
    InvalidRange(String),
    CanNotAddChild,
    Custom(String),
}

Expression parsing error

Variants

UnsupportedOperator(String)

Unsupported operator yet.

CanNotExec(Operator)

This operator does not support execution.

StartWithNonValueOperator

Your expression may start with non-value operator like ( + * )

UnpairedBrackets

Unpaired brackets, left brackets count does not equal right brackets count

DuplicateValueNode

Duplicate values node, you may have (2 3) but there is no operators between them

DuplicateOperatorNode

Duplicate operators node, you may have (+ +) but there is no values between them

CommaNotWithFunction

You have a comma(,) , but there is no function in front of it.

BracketNotWithFunction

You have empty brackets () , but there is no function in front of it.

FunctionNotExists(String)

Function not exists.

ExpectedBoolean(Value)

Expected a boolean but the given value isn't.

ExpectedIdentifier

Expected ident.

ExpectedArray

Expected array.

ExpectedObject

Expected object.

ExpectedNumber

Expect number.

NoFinalNode

Failed to parse, no final expression.

ArgumentsGreater(usize)

The number of arguments is greater than the maximum limit.

ArgumentsLess(usize)

The number of arguments is less than the minimum limit.

UnsupportedTypes(String, String)

This two value types are different or do not support mathematical calculations.

InvalidRange(String)

Invalid range expression like 1..2..3

CanNotAddChild

Can not add child node.

Custom(String)

Custom error.

Trait Implementations

impl PartialEq<Error> for Error

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

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

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

This method tests for !=.

impl Display for Error

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

Formats the value using the given formatter.

impl Debug for Error

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

Formats the value using the given formatter.

impl Error for Error

fn description(&self) -> &str

This method is soft-deprecated.

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

Deprecating in 1.33.0

: replaced by Error::source, which can support downcasting

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

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

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