Package net.hydromatic.morel.eval

Interface EvalEnv

All Known Subinterfaces:

MutableEvalEnv

All Known Implementing Classes:

EvalEnvs.ArraySubEvalEnv, EvalEnvs.MapEvalEnv, EvalEnvs.MutableArraySubEvalEnv, EvalEnvs.MutablePatSubEvalEnv, EvalEnvs.MutableSubEvalEnv, EvalEnvs.PatSubEvalEnv, EvalEnvs.SubEvalEnv

public interface EvalEnv

Evaluation environment.

Whereas Environment contains both types and values, because it is used for validation/compilation, EvalEnv contains only values.

Field Summary

Fields

Modifier and Type	Field	Description
static String	SESSION	The name of the variable that contains the Session.

Method Summary

Modifier and Type	Method	Description
default EvalEnv	bind(String name, Object value)	Creates an environment that has the same content as this one, plus the binding (name, value).
default MutableEvalEnv	bindMutable(String name)	Creates an evaluation environment that has the same content as this one, plus a mutable slot.
default MutableEvalEnv	bindMutableArray(List<String> names)	Creates an evaluation environment that has the same content as this one, plus a mutable slot or slots.
default MutableEvalEnv	bindMutablePat(Core.Pat pat)	Creates an evaluation environment that has the same content as this one, plus mutable slots for each name in a pattern.
default EvalEnv	fix()	Converts this environment to a non-mutable environment.
Object	getOpt(String name)	Returns the binding of name if bound, null if not.
default Map<String,Object>	valueMap()	Returns a map of the values and bindings.
void	visit(BiConsumer<String,Object> consumer)	Visits every variable binding in this environment.

Field Detail

SESSION

static final String SESSION

The name of the variable that contains the Session.

See Also:

Constant Field Values

Method Detail

getOpt

Object getOpt(String name)

Returns the binding of name if bound, null if not.

bind

default EvalEnv bind(String name,
                     Object value)

Creates an environment that has the same content as this one, plus the binding (name, value).

bindMutable

default MutableEvalEnv bindMutable(String name)

Creates an evaluation environment that has the same content as this one, plus a mutable slot.

bindMutablePat

default MutableEvalEnv bindMutablePat(Core.Pat pat)

Creates an evaluation environment that has the same content as this one, plus mutable slots for each name in a pattern.

bindMutableArray

default MutableEvalEnv bindMutableArray(List<String> names)

Creates an evaluation environment that has the same content as this one, plus a mutable slot or slots.

If names has one element, calling MutableEvalEnv.set(Object) will populate the slot will be filled by an object; if names has more than one element, set will expect to be given an array with the same number of elements.

visit

void visit(BiConsumer<String,Object> consumer)

Visits every variable binding in this environment.

Bindings that are obscured by more recent bindings of the same name are visited, but after the more obscuring bindings.

valueMap

default Map<String,Object> valueMap()

Returns a map of the values and bindings.

fix

default EvalEnv fix()

Converts this environment to a non-mutable environment.