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Fix bug in JavaScript backend

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This commit is contained in:
Alexey Andreev 2016-09-03 23:00:47 +03:00
parent 9143714168
commit 8b3e160d8c
1 changed files with 26 additions and 11 deletions
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37
core/src/main/java/org/teavm/backend/javascript/rendering/Renderer.java
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@ -20,6 +20,7 @@ import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.util.ArrayDeque;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Deque;
import java.util.HashMap;
@ -106,6 +107,10 @@ import org.teavm.vm.RenderingException;
public class Renderer implements ExprVisitor, StatementVisitor, RenderingContext {
private static final String variableNames = "abcdefghijkmnopqrstuvwxyz";
private static final String variablePartNames = "abcdefghijkmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
private static final Set<String> keywords = new HashSet<>(Arrays.asList("break", "case", "catch",
"class", "const", "continue", "debugger", "default", "delete", "do", "else", "export",
"extends", "finally", "for", "function", "if", "import", "in", "instanceof", "new", "return",
"super", "switch", "this", "throw", "try", "typeof", "var", "void", "while", "with", "yield"));
private final NamingStrategy naming;
private final SourceWriter writer;
private final ListableClassHolderSource classSource;
@ -127,6 +132,7 @@ public class Renderer implements ExprVisitor, StatementVisitor, RenderingContext
private Precedence precedence;
private final Map<String, String> blockIdMap = new HashMap<>();
private final List<String> cachedVariableNames = new ArrayList<>();
private final Set<String> usedVariableNames = new HashSet<>();
private MethodNode currentMethod;
private boolean end;
private int currentPart;
@ -654,6 +660,7 @@ public class Renderer implements ExprVisitor, StatementVisitor, RenderingContext
private void renderBody(MethodNode method, boolean inner) throws IOException {
currentMethod = method;
cachedVariableNames.clear();
usedVariableNames.clear();
blockIdMap.clear();
MethodReference ref = method.getReference();
debugEmitter.emitMethod(ref.getDescriptor());
@ -1252,24 +1259,32 @@ public class Renderer implements ExprVisitor, StatementVisitor, RenderingContext
return minifying ? "$t" : "$this";
}
StringBuilder sb = new StringBuilder();
--index;
if (index < variableNames.length()) {
sb.append(Character.toString(variableNames.charAt(index)));
} else {
sb.append(Character.toString(variableNames.charAt(index % variableNames.length()))
+ index / variableNames.length());
}
if (!minifying) {
VariableNode variable = index < currentMethod.getVariables().size()
? currentMethod.getVariables().get(index)
: null;
if (variable != null && variable.getName() != null) {
sb.setLength(0);
sb.append(escapeName(variable.getName()));
String result = escapeName(variable.getName());
if (keywords.contains(result) || !usedVariableNames.add(result)) {
String base = result;
int suffix = 0;
do {
result = base + "_" + suffix++;
} while (!usedVariableNames.add(result));
}
return result;
} else {
return "var$" + index;
}
} else {
--index;
if (index < variableNames.length()) {
return Character.toString(variableNames.charAt(index));
} else {
return Character.toString(variableNames.charAt(index % variableNames.length()))
+ index / variableNames.length();
}
}
return sb.toString();
}
private static String escapeName(String name) {