Enum FunctionKind

pub enum FunctionKind {
    Internal(InternalFunction),
    Deprecated(DeprecatedFunction),
    Closure(ClosureFunction),
    Mf(MfFunction),
}

函数类型枚举

定义了表达式系统中所有可用的函数类型

Variants

Internal(InternalFunction)

内置函数：系统预定义的标准函数

Deprecated(DeprecatedFunction)

已废弃函数：为向后兼容保留的旧函数

Closure(ClosureFunction)

闭包函数：用于数组操作的特殊函数

Mf(MfFunction)

自定义函数：用户定义的扩展函数

Trait Implementations

impl Clone for FunctionKind

fn clone(&self) -> FunctionKind

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for FunctionKind

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

Formats the value using the given formatter.

impl Display for FunctionKind

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

Formats the value using the given formatter.

impl PartialEq for FunctionKind

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl TryFrom<&str> for FunctionKind

fn try_from(value: &str) -> Result<Self, Self::Error>

从字符串解析函数类型

按优先级顺序尝试匹配：内置函数 > 已废弃函数 > 闭包函数 > 自定义函数

type Error = ParseError

The type returned in the event of a conversion error.

impl Eq for FunctionKind

impl StructuralPartialEq for FunctionKind