Package jminusminus

Class LocalContext

java.lang.Object

jminusminus.Context

jminusminus.LocalContext

Direct Known Subclasses:

MethodContext

class LocalContext
extends Context

A local context is a context (scope) in which local variables (including formal parameters) can be declared. Local variables are allocated at fixed offsets from the base of the current method's stack frame; this is done during analysis. The definitions for local variables record these offsets. The offsets are used in code generation.

Field Summary

Fields

Modifier and Type	Field	Description
protected int	offset	Next offset for a local variable.

Fields inherited from class jminusminus.Context

classContext, compilationUnitContext, entries, surroundingContext

Constructor Summary

Constructors

Constructor	Description
LocalContext(Context surrounding)	Constructs a local context.

Method Summary

Modifier and Type	Method	Description
int	nextOffset()	Allocates and returns a new offset (eg, for a parameter or local variable).
int	offset()	Returns the "next" offset.
void	toJSON(JSONElement json)	Adds information pertaining to this context to the given JSON element.

Methods inherited from class jminusminus.Context

addEntry, addType, classContext, compilationUnitContext, definingType, lookup, lookupType, methodContext, names, surroundingContext

Methods inherited from class java.lang.Object

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

Field Details

offset

protected int offset

Next offset for a local variable.

Constructor Details

LocalContext

public LocalContext(Context surrounding)

Constructs a local context. A local context is constructed for each block.

Parameters:

surrounding - the surrounding context.

Method Details

offset

public int offset()

Returns the "next" offset. Not to be used for allocating new offsets (the nextOffset() method is used for that).

Returns:

the next available offset.

nextOffset

public int nextOffset()

Allocates and returns a new offset (eg, for a parameter or local variable).

Returns:

the next allocated offset.

toJSON

public void toJSON(JSONElement json)

Adds information pertaining to this context to the given JSON element.

Overrides:

toJSON in class Context

Parameters:

json - JSON element.