Trait design_pattern_examples_rust::state::state_istatecontext_trait::IStateContext

pub trait IStateContext {
    // Required methods
    fn get_next_character(&mut self) -> StateChar;
    fn output_character(&mut self, character: StateChar);
}

Represents the context as passed to each state struct.

Each state struct can access the next character or output the current character through this trait.

Required Methods

fn get_next_character(&mut self) -> StateChar

Get the next character from the input.

Returns

Returns the next character wrapped in a StateChar::Char(). Returns StateChar::Eof if there is no more input.

fn output_character(&mut self, character: StateChar)

Write the character to the context. This is how the parser accumulates the filtered text.

Parameters

• character

The character to accumulate expressed as a StateChar::Char(c).

Implementors

impl IStateContext for InputOutput