Struct Context 

pub struct Context<'a> { /* private fields */ }

Evaluation context for Expression.

Implementations

impl<'a> Context<'a>

pub fn get_label(&self, key: &str) -> Option<&Option<usize>>

Looks up a label in the current context.

pub fn get_macro(&self, key: &str) -> Option<&MacroDefinition>

Looks up a macro in the current context.

pub fn get_variable(&self, key: &str) -> Option<&Expression>

Looks up a variable in the current context.

Trait Implementations

impl<'a> Clone for Context<'a>

fn clone(&self) -> Context<'a>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'a> Debug for Context<'a>

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

Formats the value using the given formatter.

impl<'a> Default for Context<'a>

fn default() -> Context<'a>

Returns the “default value” for a type.

impl<'a> From<&'a HashMap<String, Option<usize>>> for Context<'a>

fn from(labels: &'a HashMap<String, Option<usize>>) -> Self

Converts to this type from the input type.

impl<'a> From<(&'a HashMap<String, Option<usize>>, &'a HashMap<String, MacroDefinition>)> for Context<'a>

fn from( x: (&'a HashMap<String, Option<usize>>, &'a HashMap<String, MacroDefinition>), ) -> Self

Converts to this type from the input type.

impl<'a> From<(&'a HashMap<String, Option<usize>>, &'a HashMap<String, MacroDefinition>, &'a HashMap<String, Expression>)> for Context<'a>

fn from( x: (&'a HashMap<String, Option<usize>>, &'a HashMap<String, MacroDefinition>, &'a HashMap<String, Expression>), ) -> Self

Converts to this type from the input type.

impl<'a> Copy for Context<'a>