diff options
| -rw-r--r-- | config/list/runtime.lst | 3 | ||||
| -rw-r--r-- | sources/scala/runtime/InterpreterSupport.java | 106 |
2 files changed, 108 insertions, 1 deletions
diff --git a/config/list/runtime.lst b/config/list/runtime.lst index c5cb73c222..f9aa23a103 100644 --- a/config/list/runtime.lst +++ b/config/list/runtime.lst @@ -29,7 +29,8 @@ Ref.java Short.java Unit.java -runtime/RunTime.java +runtime/InterpreterSupport.java runtime/ResultOrException.java +runtime/RunTime.java ############################################################################## diff --git a/sources/scala/runtime/InterpreterSupport.java b/sources/scala/runtime/InterpreterSupport.java new file mode 100644 index 0000000000..9388ec3814 --- /dev/null +++ b/sources/scala/runtime/InterpreterSupport.java @@ -0,0 +1,106 @@ +/* __ *\ +** ________ ___ / / ___ Scala API ** +** / __/ __// _ | / / / _ | (c) 2002, LAMP/EPFL ** +** __\ \/ /__/ __ |/ /__/ __ | ** +** /____/\___/_/ |_/____/_/ | | ** +** |/ ** +\* */ + +// $Id$ + +package scala.runtime; + +/** This class provides support methods for the interpreter. */ +public class InterpreterSupport { + + //######################################################################## + // Public classes + + /** This interface provides method to show definitions. */ + public static interface DefinitionPrinter { + + /** This method is invoked for each non-value definition. */ + public void showDefinition(String signature); + + /** This method is invoked for each value definition. */ + public void showValueDefinition(String signature, Object value); + + } + + /** This class describes an evaluation result. */ + public static class EvaluationResult { + + /** The value of the result */ + public final Object value; + + /** The type of the result */ + public final String type; + + /** Creates a new instance */ + public EvaluationResult(Object value, String type) { + this.value = value; + this.type = type; + } + } + + //######################################################################## + // Private Variables + + private static final ThreadLocal printer = new ThreadLocal(); + private static final ThreadLocal result = new ThreadLocal(); + + //######################################################################## + // Public Functions + + /** Sets the definition printer of the current thread. */ + public static void setDefinitionPrinter(DefinitionPrinter object) { + printer.set(object); + } + + /** Returns the definition printer of the current thread. */ + public static DefinitionPrinter getDefinitionPrinter() { + return (DefinitionPrinter)printer.get(); + } + + /** + * This function is invoked for each non-value definition. It + * forwards the call to the current thread's definition printer. + * + * @meta method (java.lang.String, scala.Any) scala.Unit; + */ + public static void showDefinition(String signature) { + getDefinitionPrinter().showDefinition(signature); + } + + /** + * This method is invoked for each value definition. It forwards + * the call to the current thread's definition printer. + * + * @meta method (java.lang.String, scala.Any) scala.Unit; + */ + public static void showValueDefinition(String signature, Object value) { + getDefinitionPrinter().showValueDefinition(signature, value); + } + + /** + * Sets the evaluation result of the current thread. + * + * @meta method (scala.Any, java.lang.String) scala.Unit; + */ + public static void setEvaluationResult(Object value, String type) { + result.set(new EvaluationResult(value, type)); + } + + /** + * Returns and resets the evaluation result of the current + * thread. A null value indicates that the last evaluation had no + * result (only definitions). + */ + public static EvaluationResult getAndResetEvaluationResult() { + Object object = result.get(); + result.set(null); + return (EvaluationResult)object; + } + + //######################################################################## +} |