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package com.seaofnodes.simple;
import com.seaofnodes.simple.type.*;
/**
* The tracked fields are now complex enough to deserve a array-of-structs layout
*/
public class Var {
public final String _name; // Declared name
// These fields are not final for forward reference late updates or
// promotions.
public int _idx; // index in containing scope
private Type _type; // Declared type
public boolean _final; // Final field
public boolean _fref; // Forward ref
public Parser.Lexer _loc; // Source location
public Var(int idx, String name, Type type, boolean xfinal, Parser.Lexer loc ) {
this(idx,name,type,xfinal,loc,false);
}
public Var(int idx, String name, Type type, boolean xfinal, Parser.Lexer loc, boolean fref) {
_idx = idx;
_name = name;
_type = type;
_final = xfinal;
_fref = fref;
_loc = loc;
}
public Type type() {
if( !_type.isFRef() ) return _type;
// Update self to no longer use the forward ref type
Type def = Parser.TYPES.get(((TypeMemPtr)_type)._obj._name);
return (_type=_type.meet(def));
}
// Forward reference variables (not types) must be BOTTOM and
// distinct from inferred variables
public boolean isFRef() { return _fref; }
public void defFRef( Type type, boolean xfinal, Parser.Lexer loc ) {
assert isFRef() && xfinal;
_type = type;
_final = true;
_fref = false;
_loc = loc;
}
@Override public String toString() {
return _type.toString()+(_final ? " ": " !")+_name;
}
}
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