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/* ____ ____ ____ ____ ______ *\
** / __// __ \/ __// __ \/ ____/ SOcos COmpiles Scala **
** __\_ \/ /_/ / /__/ /_/ /\_ \ (c) 2002, LAMP/EPFL **
** /_____/\____/\___/\____/____/ **
\* */
// $OldId: ExpressionContext.java,v 1.2 2002/06/05 09:05:56 paltherr Exp $
// $Id$
package scala.tools.scalai;
import java.util.Map;
import java.util.HashMap;
import ch.epfl.lamp.util.SourceFile;
import scalac.symtab.Symbol;
import scalac.symtab.Type;
import scalac.util.Debug;
public class ExpressionContext {
//########################################################################
// Private Fields
private final Environment environment;
private final Map functions;
private final Map variables;
private final SourceFile source;
private final Symbol owner;
private int current;
private int maximum;
//########################################################################
// Public Constructors
public ExpressionContext(
Environment environment, SourceFile source, Symbol owner)
{
this.environment = environment;
this.functions = new HashMap();
this.variables = new HashMap();
this.source = source;
this.owner = owner;
this.current = 0;
this.maximum = 0;
}
//########################################################################
// Public Methods - translate
public Class getClass(Symbol symbol) {
return environment.getClass(symbol);
}
public Class getClass(Type type) {
return environment.getClass(type);
}
//########################################################################
// Public Methods - insert
public Function insertLabel(Symbol symbol) {
Function function = Function.Label(symbol);
assert Debug.log("insert label : ", symbol);
assert !functions.containsKey(symbol) : Debug.show(symbol);
functions.put(symbol, function);
return function;
}
public Variable insertVariable(Symbol symbol, Variable variable) {
assert Debug.log("insert variable: ", symbol);
assert !variables.containsKey(symbol) : Debug.show(symbol);
variables.put(symbol, variable);
return variable;
}
//########################################################################
// Public Methods - lookup
public Template lookupTemplate(Symbol symbol) {
return environment.lookupTemplate(symbol);
}
public Function lookupFunction(Symbol symbol) {
Object value = functions.get(symbol);
if (value != null) return (Function)value;
return environment.lookupFunction(symbol);
}
public Variable lookupVariable(Symbol symbol) {
Object value = variables.get(symbol);
if (value != null) return (Variable)value;
return environment.lookupVariable(symbol);
}
//########################################################################
// Public Methods - origin
public SourceFile source() {
return source;
}
public Symbol owner() {
return owner;
}
//########################################################################
// Public Methods - stack
public void stacksize(int size) {
assert size >= 0 : size;
maximum = Math.max(current, maximum);
current = size;
}
public int stacksize() {
return current;
}
public int stackmax() {
return maximum = Math.max(current, maximum);
}
public int push() {
return current++;
}
public int pop() {
maximum = Math.max(current, maximum);
return --current;
}
//########################################################################
}
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