gnu.expr
Class ScopeExp

java.lang.Object
  gnu.mapping.PropertySet
      gnu.mapping.Procedure
          gnu.mapping.Procedure0
              gnu.expr.Expression
                  gnu.expr.ScopeExp

All Implemented Interfaces:

Named, Printable, SourceLocator, org.xml.sax.Locator

Direct Known Subclasses:

CatchClause, LambdaExp, LetExp

public abstract class ScopeExp
extends Expression

Abstract class for expressions that add local variable bindings.

Field Summary

protected int	frameSize Size of evalFrame to allocate in interpreter.
int	id Unique id number, to ease print-outs and debugging.
ScopeExp	outer The statically enclosing binding contour.

Fields inherited from class gnu.expr.Expression

flags, NEXT_AVAIL_FLAG, noExpressions

Constructor Summary

ScopeExp()

Method Summary

void	add(Declaration decl)
void	add(Declaration prev, Declaration decl) Add a Declaration at a specified position.
void	addDeclaration(Declaration decl) Add a Declaration to the current Scope.
Declaration	addDeclaration(java.lang.Object name) Create a new declaration in the current Scope.
Declaration	addDeclaration(java.lang.Object name, Type type) Create a new declaration in the current Scope.
int	countDecls()
LambdaExp	currentLambda()
ModuleExp	currentModule()
static void	duplicateDeclarationError(Declaration oldDecl, Declaration newDecl, Compilation comp)
Declaration	firstDecl()
Declaration	getDefine(java.lang.Object name, char severity, Compilation parser) Add a new Declaration, with a message if there is an existing one.
Declaration	getNoDefine(java.lang.Object name) Lookup a declaration, create a non-defining declaration if needed.
Scope	getVarScope()
Declaration	lookup(java.lang.Object sym) Find a Declaration by name.
Declaration	lookup(java.lang.Object sym, Language language, int namespace)
static int	nesting(ScopeExp sc)
void	popScope(CodeAttr code) Clear bytecode resources for the ScopeExp.
void	remove(Declaration decl)
void	remove(Declaration prev, Declaration decl)
void	replaceFollowing(Declaration prev, Declaration newDecl) Replace the prev.next by newDecl.
protected void	setIndexes() Calculate offset and frameSize needed by interpreter.
java.lang.String	toString()
protected Expression	walk(ExpWalker walker)

Methods inherited from class gnu.expr.Expression

apply, apply0, compile, compile, compile, compileButFirst, compileNotePosition, compileWithPosition, compileWithPosition, eval, eval, getColumnNumber, getFileName, getFlag, getFlags, getLineNumber, getPublicId, getSystemId, getType, inline, isStableSourceLocation, makeWhile, match0, mustCompile, print, print, printLineColumn, setFile, setFlag, setFlag, setLine, setLine, setLine, setLine, setLocation, side_effects, valueIfConstant, walkChildren

Methods inherited from class gnu.mapping.Procedure0

apply1, apply2, apply3, apply4, applyN, numArgs

Methods inherited from class gnu.mapping.Procedure

apply, check0, check1, check2, check3, check4, checkArgCount, checkN, getSetter, getSourceLocation, match1, match2, match3, match4, matchN, maxArgs, minArgs, set0, set1, setN, setSetter, setSourceLocation

Methods inherited from class gnu.mapping.PropertySet

getName, getProperty, getSymbol, removeProperty, setName, setProperty, setProperty, setSymbol

Methods inherited from class java.lang.Object

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

Field Detail

outer

public ScopeExp outer

The statically enclosing binding contour.

frameSize

protected int frameSize

Size of evalFrame to allocate in interpreter.

id

public int id

Unique id number, to ease print-outs and debugging.

Constructor Detail

ScopeExp

public ScopeExp()

Method Detail

firstDecl

public Declaration firstDecl()

getVarScope

public Scope getVarScope()

popScope

public void popScope(CodeAttr code)

Clear bytecode resources for the ScopeExp. This potentially allows Kawa to generate code for the same (inlined, shared) ScopeExp multiple times - though we're not making use of that yet.

add

public void add(Declaration decl)

add

public void add(Declaration prev,
                Declaration decl)

Add a Declaration at a specified position.

replaceFollowing

public void replaceFollowing(Declaration prev,
                             Declaration newDecl)

Replace the prev.next by newDecl. If prev==null, replace the first decl.

remove

public void remove(Declaration decl)

remove

public void remove(Declaration prev,
                   Declaration decl)

currentLambda

public LambdaExp currentLambda()

currentModule

public ModuleExp currentModule()

lookup

public Declaration lookup(java.lang.Object sym)

Find a Declaration by name.

Parameters:

sym - the (interned) name of the Declaration sought

Returns:

the matching Declaration, if found; otherwise null

lookup

public Declaration lookup(java.lang.Object sym,
                          Language language,
                          int namespace)

getNoDefine

public Declaration getNoDefine(java.lang.Object name)

Lookup a declaration, create a non-defining declaration if needed.

getDefine

public Declaration getDefine(java.lang.Object name,
                             char severity,
                             Compilation parser)

Add a new Declaration, with a message if there is an existing one.

duplicateDeclarationError

public static void duplicateDeclarationError(Declaration oldDecl,
                                             Declaration newDecl,
                                             Compilation comp)

addDeclaration

public final Declaration addDeclaration(java.lang.Object name)

Create a new declaration in the current Scope.

Parameters:

name - name (interned) to give to the new Declaration.

addDeclaration

public final Declaration addDeclaration(java.lang.Object name,
                                        Type type)

Create a new declaration in the current Scope.

Parameters:

name - name (interned) to give to the new Declaration.

type - type of the new Declaration.

addDeclaration

public final void addDeclaration(Declaration decl)

Add a Declaration to the current Scope.

countDecls

public int countDecls()

nesting

public static int nesting(ScopeExp sc)

setIndexes

protected void setIndexes()

Calculate offset and frameSize needed by interpreter.

walk

protected Expression walk(ExpWalker walker)

Overrides:

walk in class Expression

toString

public java.lang.String toString()

Overrides:

toString in class Expression