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FunctionDefinition

mf_expression::functions::defs

Trait FunctionDefinition 

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pub trait FunctionDefinition {
    // Required methods
    fn required_parameters(&self) -> usize;
    fn optional_parameters(&self) -> usize;
    fn check_types(&self, args: &[VariableType]) -> FunctionTypecheck;
    fn call(&self, args: Arguments<'_>) -> Result<Variable>;
    fn param_type(&self, index: usize) -> Option<VariableType>;
    fn param_type_str(&self, index: usize) -> String;
    fn return_type(&self) -> VariableType;
    fn return_type_str(&self) -> String;
}

Required Methods§

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fn required_parameters(&self) -> usize

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fn optional_parameters(&self) -> usize

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

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

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

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

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fn return_type(&self) -> VariableType

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fn return_type_str(&self) -> String

Dyn Compatibility§

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors§