Struct CustomFunctionDefinition

pub struct CustomFunctionDefinition {
    pub name: String,
    pub signature: FunctionSignature,
    pub executor: Box<dyn Fn(&Arguments<'_>, Option<&Arc<dyn Any + Send + Sync>>) -> Result<Variable> + 'static>,
}

自定义函数定义

Fields

name: String

函数名称

signature: FunctionSignature

函数签名

executor: Box<dyn Fn(&Arguments<'_>, Option<&Arc<dyn Any + Send + Sync>>) -> Result<Variable> + 'static>

执行器

Implementations

impl CustomFunctionDefinition

pub fn new( name: String, signature: FunctionSignature, executor: Box<dyn Fn(&Arguments<'_>, Option<&Arc<dyn Any + Send + Sync>>) -> Result<Variable> + 'static>, ) -> Self

Trait Implementations

impl FunctionDefinition for CustomFunctionDefinition

fn call(&self, args: Arguments<'_>) -> AnyhowResult<Variable>

执行函数调用

fn required_parameters(&self) -> usize

返回必需参数的数量

fn optional_parameters(&self) -> usize

返回可选参数的数量

fn check_types(&self, args: &[Rc<VariableType>]) -> FunctionTypecheck

检查参数类型是否匹配

fn param_type(&self, index: usize) -> Option<VariableType>

获取指定位置参数的类型

fn param_type_str(&self, index: usize) -> String

获取指定位置参数类型的字符串表示

fn return_type(&self) -> VariableType

获取函数返回值类型

fn return_type_str(&self) -> String

获取函数返回值类型的字符串表示