1 files changed, 104 insertions, 0 deletions
diff --git a/src/core/lombok/javac/handlers/HandleVal.java b/src/core/lombok/javac/handlers/HandleVal.java
new file mode 100644
index 00000000..a6f22093
--- /dev/null
+++ b/src/core/lombok/javac/handlers/HandleVal.java
@@ -0,0 +1,104 @@
+/*
+ * Copyright © 2010 Reinier Zwitserloot and Roel Spilker.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+package lombok.javac.handlers;
+
+import lombok.javac.JavacASTAdapter;
+import lombok.javac.JavacASTVisitor;
+import lombok.javac.JavacNode;
+import lombok.javac.JavacResolution;
+
+import org.mangosdk.spi.ProviderFor;
+
+import com.sun.tools.javac.code.Flags;
+import com.sun.tools.javac.code.Type;
+import com.sun.tools.javac.tree.JCTree;
+import com.sun.tools.javac.tree.JCTree.JCEnhancedForLoop;
+import com.sun.tools.javac.tree.JCTree.JCExpression;
+import com.sun.tools.javac.tree.JCTree.JCVariableDecl;
+
+@ProviderFor(JavacASTVisitor.class)
+public class HandleVal extends JavacASTAdapter {
+	@Override public boolean isResolutionBased() {
+		return true;
+	}
+	
+	@Override public void visitLocal(JavacNode localNode, JCVariableDecl local) {
+		if (local.vartype != null && local.vartype.toString().equals("val")) {
+			JCExpression rhsOfEnhancedForLoop = null;
+			if (local.init == null) {
+				JCTree parentRaw = localNode.directUp().get();
+				if (parentRaw instanceof JCEnhancedForLoop) {
+					JCEnhancedForLoop efl = (JCEnhancedForLoop) parentRaw;
+					if (efl.var == local) rhsOfEnhancedForLoop = efl.expr;
+				}
+			}
+			
+			if (rhsOfEnhancedForLoop == null && local.init == null) {
+				localNode.addError("'val' on a local variable requires an initializer expression");
+				return;
+			}
+			
+			local.mods.flags |= Flags.FINAL;
+			JCExpression oldVarType = local.vartype;
+			local.vartype = JavacResolution.createJavaLangObject(localNode.getTreeMaker(), localNode.getAst());
+			
+			Type type;
+			try {
+				if (rhsOfEnhancedForLoop == null) {
+					if (local.init.type == null) {
+						JavacResolution resolver = new JavacResolution(localNode.getContext());
+						type = ((JCExpression) resolver.resolve(localNode).get(local.init)).type;
+					} else {
+						type = local.init.type;
+					}
+				} else {
+					if (rhsOfEnhancedForLoop.type == null) {
+						JavacResolution resolver = new JavacResolution(localNode.getContext());
+						type = ((JCExpression) resolver.resolve(localNode.directUp()).get(rhsOfEnhancedForLoop)).type;
+					} else {
+						type = rhsOfEnhancedForLoop.type;
+					}
+				}
+				
+				try {
+					JCExpression replacement;
+					
+					if (rhsOfEnhancedForLoop != null) {
+						localNode.addError("For now 'val' cannot be used in enhanced for loops. Fixing this is a high priority lombok issue though!");
+						return;
+						// TODO: Fix enhanced for loops - then uncomment a bunch of lines in test/transform/resource/*/ValInFor.java
+					}
+					replacement = JavacResolution.typeToJCTree(type, localNode.getTreeMaker(), localNode.getAst());
+					if (replacement != null) local.vartype = replacement;
+					else local.vartype = oldVarType;
+				} catch (JavacResolution.TypeNotConvertibleException e) {
+					localNode.addError("Cannot use 'val' here because initializer expression does not have a representable type: " + e.getMessage());
+					local.vartype = oldVarType;
+				}
+			} catch (RuntimeException e) {
+				local.vartype = oldVarType;
+				throw e;
+			}
+		}
+		// TODO search for val decls in either kind of for.
+	}
+}