gnu.expr

Interface TypeValue

All Superinterfaces:

java.lang.reflect.Type

All Known Implementing Classes:

AttributeType, ElementType, GenArrayType, LangObjType, LangPrimType, MappedArrayType, MultValuesType, NodeSetType, NodeType, OccurrenceType, ProcessingInstructionType, SeqSizeType, XDataType, XIntegerType, XStringType, XTimeType

public interface TypeValue
extends java.lang.reflect.Type

A Type or a Type expression. Can be used for higher-level types that do not map directly to a Type.

Method Summary

Modifier and Type	Method and Description
Expression	convertValue(Expression value) Return converted expression or null.
void	emitIsInstance(Variable incoming, Compilation comp, Target target) Emit code for incoming instanceof this_type.
void	emitTestIf(Variable incoming, Declaration decl, Compilation comp) Emit code for if (incoming instanceof this_type) decl = incoming ....
default java.lang.String	encodeType(Language language)
Procedure	getConstructor() Get the constructor function for this type.
Type	getImplementationType() The lower-level Type used to represent instances of this type.

Methods inherited from interface java.lang.reflect.Type

getTypeName

Method Detail

getImplementationType

Type getImplementationType()

The lower-level Type used to represent instances of this type.

emitTestIf

void emitTestIf(Variable incoming,
                Declaration decl,
                Compilation comp)

Emit code for if (incoming instanceof this_type) decl = incoming .... This method is designed for typeswitch applications, where this call is the first part of a conditional, so it must be followed by calls to emitElse and emitFi.

Parameters:

incoming - Contains the value we are testing to see if it has the type of this. If null, use top-of-stack. May not be null if decl is non-null.

decl - If non-null, assign value after coercion to Declaration.

comp - The compilation state.

emitIsInstance

void emitIsInstance(Variable incoming,
                    Compilation comp,
                    Target target)

Emit code for incoming instanceof this_type. The implementation can use InstanceOf .emitIsInstance which is a conveniece method that calls emitTestIf.

Parameters:

incoming - Contains the value we are testing to see if it has the the type of 'this'. If null, use top-of-stack.

comp - The compilation state.

target - Where to leave the result.

getConstructor

Procedure getConstructor()

Get the constructor function for this type. Returns null if there is no contructor function. Also returns null if this extends ClassType or ArrayType and standard Java constructors (<init> methods) should be used.

convertValue

Expression convertValue(Expression value)

Return converted expression or null.

encodeType

default java.lang.String encodeType(Language language)