Struct mhtemplate::Context

pub struct Context(_);

Evaluation context containing variable values.

A context can be created from the programs enviroment:

# use mhtemplate::Context;
let vars = std::env::vars();
let ctx  = Context::from(vars);

Methods

impl Context

pub fn new() -> Self

pub fn var(&self, name: &str) -> Option<&String>

pub fn var_mut(&mut self, name: &str) -> Option<&mut String>

pub fn set_var(&mut self, name: String, val: String) -> Option<String>

pub fn iter_vars(&self) -> Iter<String, String>

pub fn iter_vars_mut(&mut self) -> IterMut<String, String>

Trait Implementations

impl Clone for Context

fn clone(&self) -> Context

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Context

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.

impl Default for Context

fn default() -> Context

Returns the "default value" for a type.

impl Eq for Context

impl<'_> From<&'_ Context> for Context

fn from(ctx: &Context) -> Self

Performs the conversion.

impl From<HashMap<String, String, RandomState>> for Context

fn from(vars: HashMap<String, String>) -> Self

let mut vars = HashMap::new();
vars.insert(String::from("one"), String::from("1"));
let mut ctx = Context::from(vars);

impl From<Vars> for Context

fn from(vars: Vars) -> Self

let vars = std::env::vars();
let ctx  = Context::from(vars);

impl<'_> Index<&'_ str> for Context

type Output = String

The returned type after indexing.

fn index(&self, index: &str) -> &Self::Output

Performs the indexing (container[index]) operation.

impl<'_> IndexMut<&'_ str> for Context

fn index_mut(&mut self, index: &str) -> &mut Self::Output

Performs the mutable indexing (container[index]) operation.

impl PartialEq<Context> for Context

fn eq(&self, other: &Context) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Context) -> bool

This method tests for !=.

impl StructuralEq for Context

impl StructuralPartialEq for Context