Trait ValueStore 

pub trait ValueStore: Debug {
    // Required methods
    fn contains_root(&self, name: &str) -> bool;
    fn roots(&self) -> Vec<&str>;
    fn contains_variable(&self, path: PathRef<'_, '_>) -> bool;
    fn try_get_variable<'a>(
        &'a self,
        path: PathRef<'_, '_>,
    ) -> Option<&'a Value>;
    fn get_variable<'a>(&'a self, path: PathRef<'_, '_>) -> Result<&'a Value>;
}

Immutable view into a template’s global variables.

Required Methods

fn contains_root(&self, name: &str) -> bool

Check if root variable exists.

fn roots(&self) -> Vec<&str>

Enumerate all root variables.

fn contains_variable(&self, path: PathRef<'_, '_>) -> bool

Check if variable exists.

Notes to implementers:

• Don’t forget to reverse-index on negative array indexes
• Don’t forget about arr.first, arr.last.

fn try_get_variable<'a>(&'a self, path: PathRef<'_, '_>) -> Option<&'a Value>

Access a variable.

Notes to implementers:

• Don’t forget to reverse-index on negative array indexes
• Don’t forget about arr.first, arr.last.

fn get_variable<'a>(&'a self, path: PathRef<'_, '_>) -> Result<&'a Value>

Access a variable.

Notes to implementers:

• Don’t forget to reverse-index on negative array indexes
• Don’t forget about arr.first, arr.last.

Dyn Compatibility

This trait is dyn compatible.

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

Implementations on Foreign Types

impl ValueStore for Object

fn contains_root(&self, name: &str) -> bool

fn roots(&self) -> Vec<&str>

fn contains_variable(&self, path: PathRef<'_, '_>) -> bool

fn try_get_variable<'a>(&'a self, path: PathRef<'_, '_>) -> Option<&'a Value>

fn get_variable<'a>(&'a self, path: PathRef<'_, '_>) -> Result<&'a Value>

Implementors