Trait PhantomDataExt 

pub trait PhantomDataExt {
    // Required methods
    fn type_name(&self) -> &'static str;
    fn argument_sql(&self) -> Result<SqlMapping, ArgumentError>;
    fn return_sql(&self) -> Result<Returns, ReturnsError>;
    fn variadic(&self) -> bool;
    fn optional(&self) -> bool;
    fn entity(&self) -> FunctionMetadataTypeEntity;
}

An extension trait for PhantomData offering SQL generation related info

Since we don’t actually want to construct values during SQL generation, we use a PhantomData.

Required Methods

fn type_name(&self) -> &'static str

fn argument_sql(&self) -> Result<SqlMapping, ArgumentError>

fn return_sql(&self) -> Result<Returns, ReturnsError>

fn variadic(&self) -> bool

fn optional(&self) -> bool

fn entity(&self) -> FunctionMetadataTypeEntity

Dyn Compatibility

This trait is dyn compatible.

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

Implementations on Foreign Types

impl<T> PhantomDataExt for PhantomData<T>

where T: SqlTranslatable,

fn type_name(&self) -> &'static str

fn argument_sql(&self) -> Result<SqlMapping, ArgumentError>

fn return_sql(&self) -> Result<Returns, ReturnsError>

fn variadic(&self) -> bool

fn optional(&self) -> bool

fn entity(&self) -> FunctionMetadataTypeEntity

Implementors