Trait ColIdx 

pub trait ColIdx: Debug + Copy {
    // Required methods
    fn as_str(&self) -> Option<&str>;
    fn as_usize(&self) -> Option<&usize>;
}

Column Index, used by TryGetable. Implemented for &str and usize

Required Methods

fn as_str(&self) -> Option<&str>

Self must be &str, return None otherwise

fn as_usize(&self) -> Option<&usize>

Self must be usize, return None otherwise

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl ColIdx for &str

fn as_str(&self) -> Option<&str>

fn as_usize(&self) -> Option<&usize>

impl ColIdx for usize

fn as_str(&self) -> Option<&str>

fn as_usize(&self) -> Option<&usize>

Implementors