hlt.language.design.kernel

Class FieldUpdate

java.lang.Object

hlt.language.design.kernel.Expression

hlt.language.design.kernel.ProtoExpression

hlt.language.design.kernel.FieldUpdate

All Implemented Interfaces:

Locatable

public class FieldUpdate
extends ProtoExpression

This class is the class of field update expressions. This kind of update concerns both named tuples and class object instances. The distinction is made according to the type of the object.

Field Summary

Fields inherited from class hlt.language.design.kernel.Expression

VOID_ASSIGNMENTS

Constructor Summary

Constructors

Constructor and Description
FieldUpdate(Expression object, Global field, Expression value) Constructs a field update with the specified object expression, field name and value expression.

Method Summary

Methods

Modifier and Type	Method and Description
void	compile(Compiler compiler) Compiles this field update of expressions in the context of the specified Compiler.
Expression	copy() Returns a deep copy of this expression.
int	numberOfSubexpressions() Returns the number of subexpressions
void	setCheckedType() Sets the checked type of the expression of this field update.
Expression	setSubexpression(int n, Expression expression) Returns this expression after setting its n-th subexpression to the specified expression; if there is no subexpression at the given position, this throws a NoSuchSubexpressionException
Expression	subexpression(int n) Returns the n-th subexpression of this expression; if there is no subexpression at the given position, this throws a NoSuchSubexpressionException
java.lang.String	toString()
Expression	tupleUpdate() Returns the tuple update expression this corresponds to if not a class instance object field update; null otherwise.
void	typeCheck(TypeChecker typeChecker) Type-checks this field update in the context of the specified TypeChecker.
Expression	typedCopy() Returns a deep copy of this expression this and all its subexpressions share the same type as their copy's counterparts.

Methods inherited from class hlt.language.design.kernel.ProtoExpression

checkedType, setCheckedType, setType, type, typeRef

Methods inherited from class hlt.language.design.kernel.Expression

addType, addTypes, boxSort, containsFreeName, enclosingScope, extent, getEnd, getStart, isConstant, isEquality, isFalse, isHiddenSlicing, isNull, isSelector, isSlicing, isTrue, isVoid, locationString, otherTypes, parameters, sanitizeNames, sanitizeSorts, setCheckedTypeLocked, setEnd, setExtent, setOtherTypes, setStart, shiftOffsets, shiftOffsets, sort, substitute, typeCheck, typeCheck, typeCheckLocked

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

FieldUpdate

public FieldUpdate(Expression object,
           Global field,
           Expression value)

Constructs a field update with the specified object expression, field name and value expression.

Method Detail

tupleUpdate

public final Expression tupleUpdate()

Returns the tuple update expression this corresponds to if not a class instance object field update; null otherwise.

copy

public final Expression copy()

Description copied from class: Expression

Returns a deep copy of this expression. The types are not not copied. NB: This is a convenience for building expressions that should be used exclusively before any processing (in particular sanitizing), is done on this expression.

Specified by:

copy in class Expression

typedCopy

public final Expression typedCopy()

Description copied from class: Expression

Returns a deep copy of this expression this and all its subexpressions share the same type as their copy's counterparts. NB: This is a convenience for building expressions that should be used exclusively before any processing (in particular sanitizing), is done on this expression.

Specified by:

typedCopy in class Expression

numberOfSubexpressions

public final int numberOfSubexpressions()

Description copied from class: Expression

Returns the number of subexpressions

Overrides:

numberOfSubexpressions in class Expression

subexpression

public final Expression subexpression(int n)
                               throws NoSuchSubexpressionException

Description copied from class: Expression

Returns the n-th subexpression of this expression; if there is no subexpression at the given position, this throws a NoSuchSubexpressionException

Overrides:

subexpression in class Expression

Throws:

NoSuchSubexpressionException

setSubexpression

public final Expression setSubexpression(int n,
                          Expression expression)
                                  throws NoSuchSubexpressionException

Description copied from class: Expression

Returns this expression after setting its n-th subexpression to the specified expression; if there is no subexpression at the given position, this throws a NoSuchSubexpressionException

Overrides:

setSubexpression in class Expression

Throws:

NoSuchSubexpressionException

setCheckedType

public final void setCheckedType()

Sets the checked type of the expression of this field update.

Specified by:

setCheckedType in class Expression

typeCheck

public final void typeCheck(TypeChecker typeChecker)
                     throws TypingErrorException

Type-checks this field update in the context of the specified TypeChecker. NB: Like assignments, the type of a field update is that of the value. However, ...

Specified by:

typeCheck in class Expression

Throws:

TypingErrorException

compile

public final void compile(Compiler compiler)

Compiles this field update of expressions in the context of the specified Compiler.

Specified by:

compile in class Expression

toString

public final java.lang.String toString()

Overrides:

toString in class java.lang.Object