pub trait CoreFunctionHelper {
// Required method
fn pop_value_impl(&mut self) -> Option<Value>;
// Provided methods
fn pop_value(&mut self) -> Result<Value> { ... }
fn set_block_height(&mut self, _height: u32) { ... }
fn lookup_mapping(
&self,
_program: Option<Symbol>,
_name: Symbol,
) -> Option<&HashMap<Value, Value>> { ... }
fn lookup_mapping_mut(
&mut self,
_program: Option<Symbol>,
_name: Symbol,
) -> Option<&mut HashMap<Value, Value>> { ... }
fn mapping_get(
&self,
program: Option<Symbol>,
name: Symbol,
key: &Value,
) -> Option<Value> { ... }
fn mapping_set(
&mut self,
program: Option<Symbol>,
name: Symbol,
key: Value,
value: Value,
) -> Option<()> { ... }
fn mapping_remove(
&mut self,
program: Option<Symbol>,
name: Symbol,
key: &Value,
) -> Option<()> { ... }
fn rng(&mut self) -> Option<&mut ChaCha20Rng> { ... }
}Expand description
A context in which we can evaluate core functions.
This is intended to be implemented by Cursor, which will be used during
execution of the interpreter, and by Vec<Value>, which will be used
during compile time evaluation for constant folding.
The default implementations for rng, set_block_height, and mapping lookup
do nothing, as those features will not be available during compile time
evaluation.