From: axelcl <axelcl>
Date: Mon, 18 Apr 2005 19:13:02 +0000 (+0000)
Subject: Improved error "Unreachable code" for if statements
X-Git-Url: http://git.phpeclipse.com

Improved error "Unreachable code" for if statements
---

diff --git a/net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/compiler/parser/Parser.java b/net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/compiler/parser/Parser.java
index 4777170..01897dd 100644
--- a/net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/compiler/parser/Parser.java
+++ b/net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/compiler/parser/Parser.java
@@ -464,18 +464,14 @@ public class Parser implements ITerminalSymbols, CompilerModifiers, ParserBasicI
   private Block statementList() {
     boolean branchStatement = false;
     Statement statement;
-    int sourceStart;
-    int sourceEnd;
     int blockStart = scanner.getCurrentTokenStartPosition();
     ArrayList blockStatements = new ArrayList();
     do {
       try {
-        sourceStart = scanner.getCurrentTokenStartPosition();
         statement = statement();
         blockStatements.add(statement);
-        if (branchStatement) {
-          sourceEnd = scanner.getCurrentTokenEndPosition();
-          reportSyntaxError("Unreachable code", sourceStart, sourceEnd);
+        if (branchStatement && statement!=null) {
+          reportSyntaxError("Unreachable code", statement.sourceStart, statement.sourceEnd);
         }
         if ((token == TokenNameRBRACE) || (token == TokenNamecase) || (token == TokenNamedefault) || (token == TokenNameelse)
             || (token == TokenNameelseif) || (token == TokenNameendif) || (token == TokenNameendfor)
@@ -484,7 +480,6 @@ public class Parser implements ITerminalSymbols, CompilerModifiers, ParserBasicI
           return createBlock(blockStart, blockStatements);
         }
         branchStatement = checkUnreachableStatements(statement);
-//        return createBlock(blockStart, blockStatements);
       } catch (SyntaxError sytaxErr1) {
         // if an error occured,
         // try to find keywords
@@ -528,13 +523,12 @@ public class Parser implements ITerminalSymbols, CompilerModifiers, ParserBasicI
    * @return
    */
   private boolean checkUnreachableStatements(Statement statement) {
-    boolean branchStatement = false;
     if (statement instanceof ReturnStatement || statement instanceof ContinueStatement || statement instanceof BreakStatement) {
-      branchStatement = true;
+      return true;
     } else if (statement instanceof IfStatement && ((IfStatement)statement).checkUnreachable) {
-      branchStatement = true;
+      return true;
     }
-    return branchStatement;
+    return false;
   }
 
   /**
@@ -1949,12 +1943,16 @@ public class Parser implements ITerminalSymbols, CompilerModifiers, ParserBasicI
         int off = b.statements.length - 1;
         if (!(b.statements[off] instanceof ReturnStatement) && !(b.statements[off] instanceof ContinueStatement)
             && !(b.statements[off] instanceof BreakStatement)) {
-          iState.checkUnreachable = false;
-        }
+          if (!(b.statements[off] instanceof IfStatement) || !((IfStatement)b.statements[off]).checkUnreachable) {
+            iState.checkUnreachable = false;
+          }
+        } 
       }
     } else {
       if (!(s instanceof ReturnStatement) && !(s instanceof ContinueStatement) && !(s instanceof BreakStatement)) {
-        iState.checkUnreachable = false;
+        if (!(s instanceof IfStatement) || !((IfStatement)s).checkUnreachable) {
+          iState.checkUnreachable = false;
+        }
       }
     }
   }