StdScope

Package: com.hypixel.hytale.server.npc.util.expression

public class StdScope implements Scope

Standard implementation of Scope backed by a HashMap<String, Symbol> symbol table and an optional parent scope for hierarchical lookup. Provides methods to add constants, mutable variables, supplier-backed variables, and functions (both invariant and variant). Symbol lookup walks the parent chain when a name is not found locally.

Fields

Modifier	Type	Name
protected	Scope	parent
protected	Map<String, Symbol>	symbolTable

Constructors

Signature
public StdScope(Scope parent)

Factory Methods

Modifier	Return Type	Signature
@Nonnull public static	StdScope	copyOf(@Nonnull StdScope other)
@Nonnull public static	StdScope	mergeScopes(@Nonnull StdScope first, @Nonnull StdScope second)

Symbol Registration

Modifier	Return Type	Signature
public	void	addConst(String name, @Nullable String value)
public	void	addConst(String name, double value)
public	void	addConst(String name, boolean value)
public	void	addConst(String name, @Nullable String[] value)
public	void	addConst(String name, @Nullable double[] value)
public	void	addConst(String name, @Nullable boolean[] value)
public	void	addConstEmptyArray(String name)
public	void	addVar(String name, @Nullable String value)
public	void	addVar(String name, double value)
public	void	addVar(String name, boolean value)
public	void	addVar(String name, @Nullable String[] value)
public	void	addVar(String name, @Nullable double[] value)
public	void	addVar(String name, @Nullable boolean[] value)
public	void	addSupplier(String name, Supplier<String> value)
public	void	addSupplier(String name, DoubleSupplier value)
public	void	addSupplier(String name, BooleanSupplier value)
public	void	addStringArraySupplier(String name, Supplier<String[]> value)
public	void	addDoubleArraySupplier(String name, Supplier<double[]> value)
public	void	addBooleanArraySupplier(String name, Supplier<boolean[]> value)
public	void	addInvariant(@Nonnull String name, Scope.Function function, ValueType returnType, @Nonnull ValueType... argumentTypes)
public	void	addVariant(@Nonnull String name, Scope.Function function, ValueType returnType, @Nonnull ValueType... argumentTypes)

Value Mutation

Modifier	Return Type	Signature
public	void	changeValue(String name, @Nullable String value)
public	void	changeValue(String name, double value)
public	void	changeValue(String name, boolean value)
public	void	changeValue(String name, @Nullable String[] value)
public	void	changeValue(String name, @Nullable double[] value)
public	void	changeValue(String name, @Nullable boolean[] value)
public	void	changeValueToEmptyArray(String name)

Inner Types

Seven protected static inner classes form the symbol hierarchy: Symbol (base with isConstant and valueType), SymbolString, SymbolNumber, SymbolBoolean, SymbolStringArray, SymbolNumberArray, SymbolBooleanArray, and SymbolFunction. Each typed subclass wraps the corresponding supplier or function reference.

Related Types

• Scope — interface this class implements
• StdLib — singleton subclass providing built-in functions
• ValueType — type discriminant used by symbols