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/* ____ ____ ____ ____ ______ *\
** / __// __ \/ __// __ \/ ____/ SOcos COmpiles Scala **
** __\_ \/ /_/ / /__/ /_/ /\_ \ (c) 2002, LAMP/EPFL **
** /_____/\____/\___/\____/____/ **
\* */
// $Id$
package meta.scalac.ast;
/** A base class for expanders that generate switches on tree nodes. */
public abstract class AbstractTreeCaseExpander extends AbstractTreeExpander {
//########################################################################
// Public Constructors
public AbstractTreeCaseExpander() {
writer.importType(t_Debug);
}
//########################################################################
// Public Methods
public void printTreeSwitch() {
writer.println("switch (tree) {");
writer.println();
printTreeCases();
writer.println("default:");
writer.indent();
writer.print("throw ").print(t_Debug).
println(".abort(\"unknown tree\", tree);");
writer.undent();
writer.println("}");
}
public void printTreeCases() {
for (int i = 0; i < tree.nodes.length; i++) {
printTreeCase(tree.nodes[i]);
writer.println();
}
}
public void printTreeCase(TreeNode node) {
printTreeCaseHeader(node);
writer.println().indent();
printTreeCaseBody(node);
printTreeCaseFooter(node);
writer.undent();
}
public void printTreeCaseHeader(TreeNode node) {
node.printCase(writer, false);
}
public abstract void printTreeCaseBody(TreeNode node);
public void printTreeCaseFooter(TreeNode node) {
// do nothing
}
//########################################################################
}
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