Struct Signature

pub struct Signature {
    pub parameters: Vec<Box<dyn DataType>>,
    pub return_type: Box<dyn DataType>,
}

Signature struct is a representation of function type

Function type in GitQL used to track parameters and return type for now but later can track parameter names to allow pass parameter by name and improve error messages

GitQL Function Signature has some rules to follow

Rules:

• Parameters must contains 0 or 1 [DataType::Varargs] parameter type only.
• [DataType::Varargs] must be the last parameter.
• You can add 0 or more [DataType::Optional] parameters.
• [DataType::Optional] parameters must be at the end but also before [DataType::Varargs] if exists.

The return type can be a static DataType such as Int, Flow or Dynamic so you can return a dynamic type depending on parameters.

Fields

parameters: Vec<Box<dyn DataType>>

return_type: Box<dyn DataType>

Trait Implementations

impl Clone for Signature

fn clone(&self) -> Signature

Returns a copy of the value.

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

Performs copy-assignment from source.