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continued typecheck

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Krauß, Josefine 2024-05-31 11:54:57 +02:00
parent a147512dcb
commit abc4e3ff70
4 changed files with 51 additions and 24 deletions
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4
src/main/java/Input.java
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@ -7,7 +7,9 @@ class Example {
class Example2 { class Example2 {
boolean instVarBool; boolean instVarBool;
int m(int n){ int m(int n){
if(instVarBool){ boolean localBool;
localBool = true;
if(localBool){
return n; return n;
} }
return -1; return -1;

16
src/main/java/abstractSyntaxTree/Expression/IntConstantExpression.java
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@ -1,6 +1,12 @@
package abstractSyntaxTree.Expression; package abstractSyntaxTree.Expression;
import TypeCheck.AbstractType; import TypeCheck.AbstractType;
import TypeCheck.TypeCheckResult;
import abstractSyntaxTree.Parameter.ParameterList;
import org.objectweb.asm.MethodVisitor;
import java.util.HashMap;
import java.util.LinkedHashMap;
public class IntConstantExpression extends AbstractType implements IExpression{ public class IntConstantExpression extends AbstractType implements IExpression{
public int value; public int value;
@ -8,4 +14,14 @@ public class IntConstantExpression extends AbstractType implements IExpression{
public IntConstantExpression(int value) { public IntConstantExpression(int value) {
this.value = value; this.value = value;
} }
@Override
public TypeCheckResult typeCheck(HashMap<String, HashMap<String, HashMap<String, ParameterList>>> methodContext, HashMap<String, HashMap<String, String>> typeContext, HashMap<String, String> localVars) throws Exception {
return null;
}
@Override
public void codeGen(MethodVisitor mv, LinkedHashMap<String, String> localVars, HashMap<String, HashMap<String, String>> typeContext) throws Exception {
}
} }

8
src/main/java/abstractSyntaxTree/Expression/LocalVarIdentifier.java
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@ -24,7 +24,13 @@ public class LocalVarIdentifier implements IExpression{
@Override @Override
public TypeCheckResult typeCheck(HashMap<String, HashMap<String, HashMap<String, ParameterList>>> methodContext, HashMap<String, HashMap<String, String>> typeContext, HashMap<String, String> localVars) throws Exception { public TypeCheckResult typeCheck(HashMap<String, HashMap<String, HashMap<String, ParameterList>>> methodContext, HashMap<String, HashMap<String, String>> typeContext, HashMap<String, String> localVars) throws Exception {
return null; TypeCheckResult result = new TypeCheckResult();
if (localVars.containsKey(identifier)) {
result.type = localVars.get(identifier);
} else {
throw new Exception("TypeCheck Exception: local var does not exist");
}
return result;
} }
@Override @Override

47
src/main/java/abstractSyntaxTree/Statement/BlockStatement.java
View File

@ -34,35 +34,38 @@ public class BlockStatement extends AbstractType implements IStatement {
} }
for (IStatement statement : statements) { for (IStatement statement : statements) {
TypeCheckResult typeOfCurrentStatement = statement.typeCheck(methodContext, typeContext, localVars); // todo remove later if there are no null statement any more
if (statement != null) {
TypeCheckResult typeOfCurrentStatement = statement.typeCheck(methodContext, typeContext, localVars);
if (typeOfCurrentStatement.type.contains(",")) { if (typeOfCurrentStatement.type.contains(",")) {
// else if has 2 returns, all code paths must retrun a value. // else if has 2 returns, all code paths must retrun a value.
String[] substrings = typeOfCurrentStatement.type.split(","); String[] substrings = typeOfCurrentStatement.type.split(",");
String firstType = substrings[0]; String firstType = substrings[0];
String secondType = substrings[1]; String secondType = substrings[1];
if(!firstType.equals(this.returnType) || !firstType.equals(this.returnType)){ if (!firstType.equals(this.returnType) || !firstType.equals(this.returnType)) {
if(!firstType.equals("void")){ if (!firstType.equals("void")) {
throw new Exception("TypeCeck Exception: if paths return wrong type"); throw new Exception("TypeCeck Exception: if paths return wrong type");
} }
if(!secondType.equals("void")){ if (!secondType.equals("void")) {
throw new Exception("TypeCeck Exception: else paths return wrong type"); throw new Exception("TypeCeck Exception: else paths return wrong type");
} }
boolean firstIsVoid = firstType.equals("void"); boolean firstIsVoid = firstType.equals("void");
if(!firstIsVoid){ if (!firstIsVoid) {
typeOfCurrentStatement.type = firstType; typeOfCurrentStatement.type = firstType;
}else{ } else {
typeOfCurrentStatement.type = secondType; typeOfCurrentStatement.type = secondType;
}
} }
} }
}
if (!typeOfCurrentStatement.type.equals(this.returnType)) { if (!typeOfCurrentStatement.type.equals(this.returnType)) {
if (!typeOfCurrentStatement.type.equals("void")) if (!typeOfCurrentStatement.type.equals("void"))
throw new Exception("TypeCheck Exception: Block returns the wrong type."); throw new Exception("TypeCheck Exception: Block returns the wrong type.");
}
} }
} }
result.type = this.returnType; result.type = this.returnType;