GH-550 Add crease.panda test

examples/lang/crease.panda

@@ -0,0 +1,72 @@
+module panda
+
+/*
+ * Increase and decrease operations on different number types
+ */
+main {
+    /* Byte */
+
+    mut Byte byte = 1B
+
+    log 2 == ++byte
+    log 2 == byte++
+    log 2 == --byte
+    log 2 == byte--
+
+    log 1 == byte
+
+    /* Short */
+
+    mut Short short = 1S
+
+    log 2 == ++short
+    log 2 == short++
+    log 2 == --short
+    log 2 == short--
+
+    log 1 == short
+
+    /* Int */
+
+    mut Int int = 1
+
+    log 2 == ++int
+    log 2 == int++
+    log 2 == --int
+    log 2 == int--
+
+    log 1 == int
+
+     /* Long */
+
+    mut Long long = 1L
+
+    log 2 == ++long
+    log 2 == long++
+    log 2 == --long
+    log 2 == long--
+
+    log 1 == long
+
+     /* Float */
+
+    mut Float float = 1.0F
+
+    log 2 == ++float
+    log 2 == float++
+    log 2 == --float
+    log 2 == float--
+
+    log 1 == float
+
+    /* Double */
+
+    mut Double double = 1.0D
+
+    log 2 == ++double
+    log 2 == double++
+    log 2 == --double
+    log 2 == double--
+
+    log 1 == double
+}

panda/src/main/java/org/panda_lang/panda/language/resource/syntax/expressions/subparsers/CreaseExpression.java

@@ -25,6 +25,7 @@
 import org.panda_lang.language.runtime.MemoryContainer;
 import org.panda_lang.language.runtime.ProcessStack;
 import org.panda_lang.panda.language.resource.syntax.expressions.subparsers.number.NumberPriorities;
+import org.panda_lang.panda.language.resource.syntax.expressions.subparsers.number.NumberUtils;
 
 import java.util.function.Function;
 
@@ -33,7 +34,7 @@ final class CreaseExpression extends NumberPriorities implements DynamicExpressi
     private final Accessor<?> accessor;
     private final boolean grow;
     private final boolean post;
-    private final Function<Object, Object> function;
+    private final Function<Number, Object> function;
 
     public CreaseExpression(Accessor<?> accessor, boolean grow, boolean post) {
         this.accessor = accessor;
@@ -46,40 +47,42 @@ public CreaseExpression(Accessor<?> accessor, boolean grow, boolean post) {
     @SuppressWarnings("unchecked")
     public Object evaluate(ProcessStack stack, Object instance) throws Exception {
         MemoryContainer memory = accessor.fetchMemoryContainer(stack, instance);
-        Object before = memory.get(accessor.getMemoryPointer());
 
+        Number before = memory.get(accessor.getMemoryPointer());
         Object after = function.apply(before);
         memory.set(accessor.getMemoryPointer(), after);
 
-        return post ? before : after;
+        return post
+                ? before
+                : after;
     }
 
-    private Function<Object, Object> toFunction(int priority) {
+    private Function<Number, Object> toFunction(int priority) {
         switch (priority) {
             case INT:
                 return grow
-                        ? value -> (int) value + 1
-                        : value -> (int) value - 1;
+                        ? value -> value.intValue() + 1
+                        : value -> value.intValue() - 1;
             case LONG:
                 return grow
-                        ? value -> (long) value + 1L
-                        : value -> (long) value - 1L;
+                        ? value -> value.longValue() + 1L
+                        : value -> value.longValue() - 1L;
             case DOUBLE:
                 return grow
-                        ? value -> (double) value + 1.0D
-                        : value -> (double) value - 1.0D;
+                        ? value -> value.doubleValue() + 1.0D
+                        : value -> value.doubleValue() - 1.0D;
             case FLOAT:
                 return grow
-                        ? value -> (float) value + 1.0F
-                        : value -> (float) value - 1.0F;
+                        ? value -> value.floatValue() + 1.0F
+                        : value -> value.floatValue() - 1.0F;
             case BYTE:
                 return grow
-                        ? value -> (byte) value + 1
-                        : value -> (byte) value - 1;
+                        ? value -> value.byteValue() + 1
+                        : value -> value.byteValue() - 1;
             case SHORT:
                 return grow
-                        ? value -> (short) value + 1
-                        : value -> (short) value - 1;
+                        ? value -> value.shortValue() + 1
+                        : value -> value.shortValue() - 1;
             default:
                 throw new PandaParserException("Unknown number type: " + priority);
         }

panda/src/test/groovy/org/panda_lang/panda/examples/lang/CreaseTest.groovy

@@ -0,0 +1,14 @@
+package org.panda_lang.panda.examples.lang
+
+import groovy.transform.CompileStatic
+import org.junit.jupiter.api.Test
+
+@CompileStatic
+class CreaseTest extends LangTestSpecification {
+
+    @Test
+    void 'should compile and execute crease operations' () {
+        launch 'crease.panda'
+    }
+
+}