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/* ____ ____ ____ ____ ______ *\
** / __// __ \/ __// __ \/ ____/ SOcos COmpiles Scala **
** __\_ \/ /_/ / /__/ /_/ /\_ \ (c) 2002, LAMP/EPFL **
** /_____/\____/\___/\____/____/ **
\* */
// $Id$
package meta.scalac.ast;
public class MetaLazyTreeCopier extends AbstractTreeMethodExpander {
//########################################################################
// Public Methods
public void printTreeMethod(TreeNode node, boolean withSymbol) {
TreeField symbol = node.getSymbol();
node.printMethod(writer, tree.getFormal("tree"), withSymbol).lbrace();
if (!withSymbol && node.hasLinkedFields())
writer.println("assert tree.symbol() == null : "+
"\"tree's symbol is not null\";");
writer.print(node.getType(0)).print(" t = (").
print(node.getType(0)).println(")tree;");
TreeField[] fields = node.getFields(withSymbol);
// !!! why do we copy if there is no symbol and no field
if (withSymbol || node.fields.length > 0) {
writer.print("if (").indent();
if (withSymbol) writer.print("t.symbol() == " + symbol);
for (int i = 0; i < fields.length; i++) {
if (i > 0 ? true : withSymbol) writer.println(" &&");
writer.print("t." + fields[i] + " == " + fields[i]);
}
writer.println(")");
writer.println("return t;").undent();
}
writer.print("return copier.");
node.printCall(writer, "tree", withSymbol).println(";");
writer.rbrace();
if (withSymbol && node.hasLinkedFields()) {
node.printMethod(writer, tree.getFormal("tree"), false, true);
writer.lbrace();
symbol.print(writer, true).println(" = tree.symbol();");
node.printCall(writer.print("return "), "tree", true).println(";");
writer.rbrace();
return;
}
}
//########################################################################
}
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