gnu.kawa.lispexpr
Class LangObjType

java.lang.Object
  gnu.bytecode.Type
      gnu.bytecode.ObjectType
          gnu.kawa.lispexpr.LangObjType

All Implemented Interfaces:

TypeValue

public class LangObjType
extends ObjectType
implements TypeValue

Field Summary

static LangObjType	filepathType
static LangObjType	pathType
static LangObjType	URIType

Fields inherited from class gnu.bytecode.ObjectType

flags

Fields inherited from class gnu.bytecode.Type

boolean_ctype, boolean_type, booleanValue_method, byte_type, char_type, clone_method, double_type, doubleValue_method, float_type, floatValue_method, int_type, intValue_method, java_lang_Class_type, long_type, longValue_method, neverReturnsType, nullType, number_type, pointer_type, reflectClass, short_type, string_type, throwable_type, toString_method, tostring_type, typeArray0, void_type

Method Summary

java.lang.Object	coerceFromObject(java.lang.Object obj) Convert an object to a value of this Type.
int	compare(Type other) Return a numeric code showing "subtype" relationship: 1: if other is a pure subtype of this; 0: if has the same values; -1: if this is a pure subtype of other; -2: if they have values in common but neither is a subtype of the other; -3: if the types have no values in common.
void	emitCoerceFromObject(CodeAttr code) Compile (in given method) cast from Object to this Type.
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 ....
Procedure	getConstructor() Get the constructor function for this type.
Type	getImplementationType() The type used to implement types not natively understood by the JVM.
int	getMethods(Filter filter, int searchSupers, java.util.Vector result, java.lang.String context)
java.lang.Class	getReflectClass() Get the java.lang.Class object for the representation type.

Methods inherited from class gnu.bytecode.ObjectType

getInternalName, isExisting, isInstance, promote, setExisting

Methods inherited from class gnu.bytecode.Type

coerceToObject, emitCoerceToObject, emitIsInstance, getName, getSignature, getSize, getSizeInWords, getType, hashCode, isMoreSpecific, isSubtype, isValidJavaTypeName, isVoid, lookupType, lowestCommonSuperType, make, registerTypeForClass, setName, setReflectClass, setSignature, signatureLength, signatureLength, signatureToName, signatureToPrimitive, signatureToType, signatureToType, swappedCompareResult, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

pathType

public static final LangObjType pathType

filepathType

public static final LangObjType filepathType

URIType

public static final LangObjType URIType

Method Detail

compare

public int compare(Type other)

Description copied from class: Type

Return a numeric code showing "subtype" relationship: 1: if other is a pure subtype of this; 0: if has the same values; -1: if this is a pure subtype of other; -2: if they have values in common but neither is a subtype of the other; -3: if the types have no values in common. "Same member" is rather loose; by "A is a subtype of B" we mean that all instance of A can be "widened" to B. More formally, A.compare(B) returns: 1: all B values can be converted to A without a coercion failure (i.e. a ClassCastException or overflow or major loss of information), but not vice versa. 0: all A values can be converted to B without a coercion failure and vice versa; -1: all A values can be converted to B without a coercion failure not not vice versa; -2: there are (potentially) some A values that can be converted to B, and some B values can be converted to A; -3: there are no A values that can be converted to B, and neither are there any B values that can be converted to A.

Overrides:

compare in class ObjectType

getMethods

public int getMethods(Filter filter,
                      int searchSupers,
                      java.util.Vector result,
                      java.lang.String context)

Overrides:

getMethods in class ObjectType

getReflectClass

public java.lang.Class getReflectClass()

Description copied from class: ObjectType

Get the java.lang.Class object for the representation type.

Overrides:

getReflectClass in class ObjectType

getImplementationType

public Type getImplementationType()

Description copied from class: Type

The type used to implement types not natively understood by the JVM. Usually, the identity function. However, a language might handle union types or template types or type expressions calculated at run time. In that case return the type used at the JVM level, and known at compile time.

Specified by:

getImplementationType in interface TypeValue

Overrides:

getImplementationType in class ObjectType

emitIsInstance

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

Description copied from interface: TypeValue

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

Specified by:

emitIsInstance in interface TypeValue

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.

emitTestIf

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

Description copied from interface: TypeValue

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.

Specified by:

emitTestIf in interface TypeValue

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 incoming is non-null.

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

comp - The compilation state.

coerceFromObject

public java.lang.Object coerceFromObject(java.lang.Object obj)

Description copied from class: ObjectType

Convert an object to a value of this Type. Throw a ClassCastException when this is not possible.

Overrides:

coerceFromObject in class ObjectType

emitCoerceFromObject

public void emitCoerceFromObject(CodeAttr code)

Description copied from class: ObjectType

Compile (in given method) cast from Object to this Type.

Overrides:

emitCoerceFromObject in class ObjectType

getConstructor

public Procedure getConstructor()

Description copied from interface: TypeValue

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 ( methods) should be used.

Specified by:

getConstructor in interface TypeValue