gnu.kawa.lispexpr

Class LangObjType

Implemented Interfaces:
TypeValue

public class LangObjType
extends ObjectType
implements TypeValue

Field Summary

static LangObjType
URIType
static LangObjType
filepathType
static LangObjType
pathType

Fields inherited from class gnu.bytecode.ObjectType

flags

Fields inherited from class gnu.bytecode.Type

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

Method Summary

Object
coerceFromObject(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 code to coerce/convert from Object to this type.
void
emitIsInstance(Variable incoming, Compilation comp, Target target)
void
emitTestIf(Variable incoming, Declaration decl, Compilation comp)
Procedure
getConstructor()
Type
getImplementationType()
The type used to implement types not natively understood by the JVM.
int
getMethods(Filter filter, int searchSupers, java.util.Vector result, String context)
java.lang.Class
getReflectClass()
Get the java.lang.Class object for the representation type.

Methods inherited from class gnu.bytecode.ObjectType

coerceFromObject, compare, emitCoerceFromObject, getContextClass, getImplementationType, getInternalName, getMethods, getReflectClass, isExisting, isInstance, promote, setExisting

Methods inherited from class gnu.bytecode.Type

coerceFromObject, coerceToObject, compare, emitCoerceFromObject, emitCoerceToObject, emitIsInstance, getImplementationType, getName, getReflectClass, getSignature, getSize, getSizeInWords, getType, hashCode, isInstance, isMoreSpecific, isSubtype, isValidJavaTypeName, isVoid, lookupType, lowestCommonSuperType, make, promote, registerTypeForClass, setName, setReflectClass, setSignature, signatureLength, signatureLength, signatureToName, signatureToPrimitive, signatureToType, signatureToType, swappedCompareResult, toString

Field Details

URIType

public static final LangObjType URIType

filepathType

public static final LangObjType filepathType

pathType

public static final LangObjType pathType

Method Details

coerceFromObject

public Object coerceFromObject(Object obj)
Convert an object to a value of this Type. Throw a ClassCastException when this is not possible.
Overrides:
coerceFromObject in interface ObjectType

compare

public 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. "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 interface ObjectType

emitCoerceFromObject

public void emitCoerceFromObject(CodeAttr code)
Compile code to coerce/convert from Object to this type.
Overrides:
emitCoerceFromObject in interface ObjectType

emitIsInstance

public void emitIsInstance(Variable incoming,
                           Compilation comp,
                           Target target)
Specified by:
emitIsInstance in interface TypeValue

emitTestIf

public void emitTestIf(Variable incoming,
                       Declaration decl,
                       Compilation comp)
Specified by:
emitTestIf in interface TypeValue

getConstructor

public Procedure getConstructor()
Specified by:
getConstructor in interface TypeValue

getImplementationType

public Type getImplementationType()
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 interface ObjectType

getMethods

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

getReflectClass

public java.lang.Class getReflectClass()
Get the java.lang.Class object for the representation type.
Overrides:
getReflectClass in interface ObjectType