Добавлена функция std::try

Author: aNNiMON

program.own

@@ -252,4 +252,7 @@ println formatDate(d)
 println formatDate(d, newFormat("yyyy-MM-dd HH:mm:ss, EEEE"))
 println parseDate("2016/05/10", newFormat("yyyy/MM/dd"))
 println toTimestamp(d)
-println newDate(toTimestamp(d) - 100000)
+println newDate(toTimestamp(d) - 100000)
+
+try(def() = try + 2)
+println try(def() = try(), def(type, message) = sprintf("Error handled:\ntype: %s\nmessage: %s", type, message))

src/com/annimon/ownlang/lib/modules/functions/std_try.java

@@ -0,0 +1,28 @@
+package com.annimon.ownlang.lib.modules.functions;
+
+import com.annimon.ownlang.exceptions.TypeException;
+import com.annimon.ownlang.lib.*;
+
+public final class std_try implements Function {
+
+    @Override
+    public Value execute(Value... args) {
+        Arguments.checkOrOr(1, 2, args.length);
+        if (args[0].type() != Types.FUNCTION) {
+            throw new TypeException(args[0].toString() + " is not a function");
+        }
+        try {
+            return ((FunctionValue) args[0]).getValue().execute();
+        } catch (Exception ex) {
+            if (args.length == 2 && args[1].type() == Types.FUNCTION) {
+                final String message = ex.getMessage();
+                final Function catchFunction = ((FunctionValue) args[1]).getValue();
+                return catchFunction.execute(
+                        new StringValue(ex.getClass().getName()),
+                        new StringValue(message == null ? "" : message));
+            }
+            return NumberValue.MINUS_ONE;
+        }
+    }
+    
+}

src/com/annimon/ownlang/lib/modules/std.java

@@ -22,6 +22,7 @@ public void init() {
         Functions.set("sleep", new std_sleep());
         Functions.set("thread", new std_thread());
         Functions.set("sync", new std_sync());
+        Functions.set("try", new std_try());
 
         // String
         Functions.set("sprintf", new std_sprintf());