Package net.hydromatic.morel.eval

Interface MutableEvalEnv

All Superinterfaces:

EvalEnv

All Known Implementing Classes:

EvalEnvs.MutableArraySubEvalEnv, EvalEnvs.MutablePatSubEvalEnv, EvalEnvs.MutableSubEvalEnv

public interface MutableEvalEnv
extends EvalEnv

An evaluation environment whose last entry is mutable.

Field Summary

Fields inherited from interface net.hydromatic.morel.eval.EvalEnv

SESSION

Method Summary

Modifier and Type	Method	Description
void	set(Object value)	Puts a value into this environment.
default boolean	setOpt(Object value)	Puts a value into this environment in a way that may not succeed.

Methods inherited from interface net.hydromatic.morel.eval.EvalEnv

bind, bindMutable, bindMutableArray, bindMutablePat, fix, getOpt, valueMap, visit

Method Details

set

void set(Object value)

Puts a value into this environment.

setOpt

default boolean setOpt(Object value)

Puts a value into this environment in a way that may not succeed.

For example, if this environment is based on the pattern (x, 2) then (1, 2) will succeed and will bind x to 1, but (3, 4) will fail.

The default implementation calls set(java.lang.Object) and always succeeds.