Java XBasicForLoopExpression类代码示例

import org.eclipse.xtext.xbase.XBasicForLoopExpression; //导入依赖的package包/类
@Check
public void checkDeadCode(XBasicForLoopExpression loop) {
	XExpression predicate = loop.getExpression();
	if (!earlyExitComputer.isEarlyExit(predicate)) {
		Optional<BooleanResult> result = getBooleanResult(predicate);
		if (result.isPresent()) {
			BooleanResult booleanResult = result.get();
			markConstantBooleanCondition(predicate, booleanResult, false);
			if (booleanResult.isCompileTimeConstant() && !booleanResult.getValue().or(Boolean.TRUE)) {
				markAsDeadCode(loop.getEachExpression());
				return;
			}
		}
		if (earlyExitComputer.isEarlyExit(loop.getEachExpression())) {
			markAsDeadCode(loop.getUpdateExpressions());
		}
	} else {
		if (!markAsDeadCode(loop.getUpdateExpressions())) {
			markAsDeadCode(loop.getEachExpression());
		}
	}
}
 

import org.eclipse.xtext.xbase.XBasicForLoopExpression; //导入依赖的package包/类
protected void _computeTypes(final XBasicForLoopExpression object, final ITypeComputationState state) {
	for(XExpression initExpression : object.getInitExpressions()) {
		ITypeComputationState expressionState = state.withoutExpectation();
		expressionState.computeTypes(initExpression);
		addLocalToCurrentScope(initExpression, state);
	}
	state.withinScope(object);
	XExpression expression = object.getExpression();
	if (expression != null) {
		LightweightTypeReference booleanType = getRawTypeForName(Boolean.TYPE, state);
		ITypeComputationState conditionExpectation = state.withExpectation(booleanType);
		conditionExpectation.computeTypes(expression);
	}
	
	XExpression eachExpression = object.getEachExpression();
	ITypeComputationState stateWithoutExpectation = state.withoutExpectation();
	ITypeComputationState eachExpressionState = reassignCheckedType(expression, eachExpression, stateWithoutExpectation);
	eachExpressionState.computeTypes(eachExpression);
	
	for (XExpression updateExpression : object.getUpdateExpressions()) {
		eachExpressionState.computeTypes(updateExpression);
	}
	
	LightweightTypeReference primitiveVoid = getPrimitiveVoid(state);
	state.acceptActualType(primitiveVoid);
}
 

import org.eclipse.xtext.xbase.XBasicForLoopExpression; //导入依赖的package包/类
protected Object _doEvaluate(XBasicForLoopExpression forLoop, IEvaluationContext context, CancelIndicator indicator) {
	IEvaluationContext forkedContext = context.fork();
	for (XExpression initExpression : forLoop.getInitExpressions()) {
		internalEvaluate(initExpression, forkedContext, indicator);
	}
	XExpression expression = forLoop.getExpression();
	Object condition = expression == null ? Boolean.TRUE : internalEvaluate(expression, forkedContext, indicator);
	while (Boolean.TRUE.equals(condition)) {
		internalEvaluate(forLoop.getEachExpression(), forkedContext, indicator);
		for (XExpression updateExpression : forLoop.getUpdateExpressions()) {
			internalEvaluate(updateExpression, forkedContext, indicator);
		}
		condition = expression == null ? Boolean.TRUE : internalEvaluate(expression, forkedContext, indicator);
	}
	return null;
}
 

import org.eclipse.xtext.xbase.XBasicForLoopExpression; //导入依赖的package包/类
protected void _toJavaStatement(XBasicForLoopExpression expr, ITreeAppendable b, boolean isReferenced) {
	if (canCompileToJavaBasicForStatement(expr, b)) {
		toJavaBasicForStatement(expr, b, isReferenced);
	} else {
		toJavaWhileStatement(expr, b, isReferenced);
	}
}
 

import org.eclipse.xtext.xbase.XBasicForLoopExpression; //导入依赖的package包/类
protected Collection<IEarlyExitComputer.ExitPoint> exitPoints(final XExpression expression) {
  if (expression instanceof XDoWhileExpression) {
    return _exitPoints((XDoWhileExpression)expression);
  } else if (expression instanceof XWhileExpression) {
    return _exitPoints((XWhileExpression)expression);
  } else if (expression instanceof XAbstractFeatureCall) {
    return _exitPoints((XAbstractFeatureCall)expression);
  } else if (expression instanceof XBasicForLoopExpression) {
    return _exitPoints((XBasicForLoopExpression)expression);
  } else if (expression instanceof XBlockExpression) {
    return _exitPoints((XBlockExpression)expression);
  } else if (expression instanceof XConstructorCall) {
    return _exitPoints((XConstructorCall)expression);
  } else if (expression instanceof XForLoopExpression) {
    return _exitPoints((XForLoopExpression)expression);
  } else if (expression instanceof XIfExpression) {
    return _exitPoints((XIfExpression)expression);
  } else if (expression instanceof XReturnExpression) {
    return _exitPoints((XReturnExpression)expression);
  } else if (expression instanceof XSwitchExpression) {
    return _exitPoints((XSwitchExpression)expression);
  } else if (expression instanceof XSynchronizedExpression) {
    return _exitPoints((XSynchronizedExpression)expression);
  } else if (expression instanceof XThrowExpression) {
    return _exitPoints((XThrowExpression)expression);
  } else if (expression instanceof XTryCatchFinallyExpression) {
    return _exitPoints((XTryCatchFinallyExpression)expression);
  } else if (expression instanceof XVariableDeclaration) {
    return _exitPoints((XVariableDeclaration)expression);
  } else if (expression != null) {
    return _exitPoints(expression);
  } else {
    throw new IllegalArgumentException("Unhandled parameter types: " +
      Arrays.<Object>asList(expression).toString());
  }
}
 

import org.eclipse.xtext.xbase.XBasicForLoopExpression; //导入依赖的package包/类
protected void completeXBasicForLoopInit(final EObject model, final ContentAssistContext context, final IIdeContentProposalAcceptor acceptor) {
  final ICompositeNode node = NodeModelUtils.getNode(model);
  int _offset = node.getOffset();
  int _offset_1 = context.getOffset();
  boolean _greaterEqualsThan = (_offset >= _offset_1);
  if (_greaterEqualsThan) {
    this.createLocalVariableAndImplicitProposals(model, IExpressionScope.Anchor.BEFORE, context, acceptor);
    return;
  }
  if ((model instanceof XBasicForLoopExpression)) {
    final EList<XExpression> children = ((XBasicForLoopExpression)model).getInitExpressions();
    for (int i = (children.size() - 1); (i >= 0); i--) {
      {
        final XExpression child = children.get(i);
        final ICompositeNode childNode = NodeModelUtils.getNode(child);
        int _endOffset = childNode.getEndOffset();
        int _offset_2 = context.getOffset();
        boolean _lessEqualsThan = (_endOffset <= _offset_2);
        if (_lessEqualsThan) {
          this.createLocalVariableAndImplicitProposals(child, IExpressionScope.Anchor.AFTER, context, acceptor);
          return;
        }
      }
    }
  }
  this.createLocalVariableAndImplicitProposals(model, IExpressionScope.Anchor.BEFORE, context, acceptor);
}
 

import org.eclipse.xtext.xbase.XBasicForLoopExpression; //导入依赖的package包/类
@Test public void testBasicForLoopExpression_0() throws Exception {
	XBasicForLoopExpression loop = (XBasicForLoopExpression) expression("for(var i = 0; i < 10; i = i + 1) {}");
	for (XExpression initExpression : loop.getInitExpressions()) {
		assertExpected(null, initExpression);	
	}
	assertExpected("boolean", loop.getExpression());
	for (XExpression updateExpression : loop.getUpdateExpressions()) {
		assertExpected(null, updateExpression);	
	}
}
 

import org.eclipse.xtext.xbase.XBasicForLoopExpression; //导入依赖的package包/类
@Test public void testBasicForLoopExpression_1() throws Exception {
	XBasicForLoopExpression loop = (XBasicForLoopExpression) expression("for(null; null; null) {}");
	for (XExpression initExpression : loop.getInitExpressions()) {
		assertExpected(null, initExpression);	
	}
	assertExpected("boolean", loop.getExpression());
	for (XExpression updateExpression : loop.getUpdateExpressions()) {
		assertExpected(null, updateExpression);	
	}
}
 

import org.eclipse.xtext.xbase.XBasicForLoopExpression; //导入依赖的package包/类
@Test public void testBasicForLoopExpression_2() throws Exception {
	XBasicForLoopExpression loop = (XBasicForLoopExpression) expression("for(;;) {}");
	for (XExpression initExpression : loop.getInitExpressions()) {
		assertExpected(null, initExpression);	
	}
	assertExpected(null, loop.getExpression());
	for (XExpression updateExpression : loop.getUpdateExpressions()) {
		assertExpected(null, updateExpression);	
	}
}
 

import org.eclipse.xtext.xbase.XBasicForLoopExpression; //导入依赖的package包/类
@Deprecated
protected void sequence_XBasicForLoopExpression(EObject context, XBasicForLoopExpression semanticObject) {
	sequence_XBasicForLoopExpression(createContext(context, semanticObject), semanticObject);
}
 

import org.eclipse.xtext.xbase.XBasicForLoopExpression; //导入依赖的package包/类
@Override
public void computeTypes(XExpression expression, ITypeComputationState state) {
	if (expression instanceof XAssignment) {
		_computeTypes((XAssignment)expression, state);
	} else if (expression instanceof XAbstractFeatureCall) {
		_computeTypes((XAbstractFeatureCall)expression, state);
	} else if (expression instanceof XDoWhileExpression) {
		_computeTypes((XDoWhileExpression)expression, state);
	} else if (expression instanceof XWhileExpression) {
		_computeTypes((XWhileExpression)expression, state);
	} else if (expression instanceof XBlockExpression) {
		_computeTypes((XBlockExpression)expression, state);
	} else if (expression instanceof XBooleanLiteral) {
		_computeTypes((XBooleanLiteral)expression, state);
	} else if (expression instanceof XCastedExpression) {
		_computeTypes((XCastedExpression)expression, state);
	} else if (expression instanceof XClosure) {
		_computeTypes((XClosure)expression, state);
	} else if (expression instanceof XConstructorCall) {
		_computeTypes((XConstructorCall)expression, state);
	} else if (expression instanceof XForLoopExpression) {
		_computeTypes((XForLoopExpression)expression, state);
	} else if (expression instanceof XBasicForLoopExpression) {
		_computeTypes((XBasicForLoopExpression)expression, state);
	} else if (expression instanceof XIfExpression) {
		_computeTypes((XIfExpression)expression, state);
	} else if (expression instanceof XInstanceOfExpression) {
		_computeTypes((XInstanceOfExpression)expression, state);
	} else if (expression instanceof XNumberLiteral) {
		_computeTypes((XNumberLiteral)expression, state);
	} else if (expression instanceof XNullLiteral) {
		_computeTypes((XNullLiteral)expression, state);
	} else if (expression instanceof XReturnExpression) {
		_computeTypes((XReturnExpression)expression, state);
	} else if (expression instanceof XStringLiteral) {
		_computeTypes((XStringLiteral)expression, state);
	} else if (expression instanceof XSwitchExpression) {
		_computeTypes((XSwitchExpression)expression, state);
	} else if (expression instanceof XThrowExpression) {
		_computeTypes((XThrowExpression)expression, state);
	} else if (expression instanceof XTryCatchFinallyExpression) {
		_computeTypes((XTryCatchFinallyExpression)expression, state);
	} else if (expression instanceof XTypeLiteral) {
		_computeTypes((XTypeLiteral)expression, state);
	} else if (expression instanceof XVariableDeclaration) {
		_computeTypes((XVariableDeclaration)expression, state);
	} else if (expression instanceof XListLiteral) {
		_computeTypes((XListLiteral)expression, state);
	} else if (expression instanceof XSetLiteral) {
		_computeTypes((XSetLiteral)expression, state);
	} else if (expression instanceof XSynchronizedExpression) {
		_computeTypes((XSynchronizedExpression)expression, state);
	} else {
		throw new UnsupportedOperationException("Missing type computation for expression type: " + expression.eClass().getName() + " / " + state);
	}
}
 

import org.eclipse.xtext.xbase.XBasicForLoopExpression; //导入依赖的package包/类
/**
 * Returns <code>true</code> for expressions that seem to be early exit expressions, e.g.
 * <pre>
 *   while(condition) {
 *     if (anotherCondition)
 *       return value
 *     changeResultOfFirstCondition
 *   }
 * </pre>
 */
public boolean isIntentionalEarlyExit(/* @Nullable */ XExpression expression) {
	if (expression == null) {
		return true;
	}
	if (expression instanceof XBlockExpression) {
		XBlockExpression block = (XBlockExpression) expression;
		List<XExpression> children = block.getExpressions();
		for(XExpression child: children) {
			if (isIntentionalEarlyExit(child)) {
				return true;
			}
		}
	} else if (expression instanceof XIfExpression) {
		return isIntentionalEarlyExit(((XIfExpression) expression).getThen()) 
				|| isIntentionalEarlyExit(((XIfExpression) expression).getElse());
	} else if (expression instanceof XSwitchExpression) {
		XSwitchExpression switchExpression = (XSwitchExpression) expression;
		for(XCasePart caseExpression: switchExpression.getCases()) {
			if (isIntentionalEarlyExit(caseExpression.getThen())) {
				return true;
			}
		}
		if (isIntentionalEarlyExit(switchExpression.getDefault())) {
			return true;
		}
	} else if (expression instanceof XTryCatchFinallyExpression) {
		XTryCatchFinallyExpression tryCatchFinally = (XTryCatchFinallyExpression) expression;
		if (isIntentionalEarlyExit(tryCatchFinally.getExpression())) {
			for(XCatchClause catchClause: tryCatchFinally.getCatchClauses()) {
				if (!isIntentionalEarlyExit(catchClause.getExpression()))
					return false;
			}
			return true;
		}
		return false;
	} else if (expression instanceof XAbstractWhileExpression) {
		return isIntentionalEarlyExit(((XAbstractWhileExpression) expression).getBody());
	} else if (expression instanceof XForLoopExpression) {
		return isIntentionalEarlyExit(((XForLoopExpression) expression).getEachExpression());
	} else if (expression instanceof XBasicForLoopExpression) {
		return isIntentionalEarlyExit(((XBasicForLoopExpression) expression).getEachExpression());
	} else if (expression instanceof XSynchronizedExpression) {
		return isIntentionalEarlyExit(((XSynchronizedExpression) expression).getExpression());
	}
	return expression instanceof XReturnExpression || expression instanceof XThrowExpression;
}
 

import org.eclipse.xtext.xbase.XBasicForLoopExpression; //导入依赖的package包/类
@Override
protected void doInternalToJavaStatement(XExpression obj, ITreeAppendable appendable, boolean isReferenced) {
	if (obj instanceof XBlockExpression) {
		_toJavaStatement((XBlockExpression) obj, appendable, isReferenced);
	} else if (obj instanceof XCastedExpression) {
		_toJavaStatement((XCastedExpression) obj, appendable, isReferenced);
	} else if (obj instanceof XClosure) {
		_toJavaStatement((XClosure) obj, appendable, isReferenced);
	} else if (obj instanceof XConstructorCall) {
		_toJavaStatement((XConstructorCall) obj, appendable, isReferenced);
	} else if (obj instanceof XDoWhileExpression) {
		_toJavaStatement((XDoWhileExpression) obj, appendable, isReferenced);
	} else if (obj instanceof XForLoopExpression) {
		_toJavaStatement((XForLoopExpression) obj, appendable, isReferenced);
	} else if (obj instanceof XBasicForLoopExpression) {
		_toJavaStatement((XBasicForLoopExpression) obj, appendable, isReferenced);
	} else if (obj instanceof XIfExpression) {
		_toJavaStatement((XIfExpression) obj, appendable, isReferenced);
	} else if (obj instanceof XInstanceOfExpression) {
		_toJavaStatement((XInstanceOfExpression) obj, appendable, isReferenced);
	} else if (obj instanceof XReturnExpression) {
		_toJavaStatement((XReturnExpression) obj, appendable, isReferenced);
	} else if (obj instanceof XSwitchExpression) {
		_toJavaStatement((XSwitchExpression) obj, appendable, isReferenced);
	} else if (obj instanceof XThrowExpression) {
		_toJavaStatement((XThrowExpression) obj, appendable, isReferenced);
	} else if (obj instanceof XTryCatchFinallyExpression) {
		_toJavaStatement((XTryCatchFinallyExpression) obj, appendable, isReferenced);
	} else if (obj instanceof XVariableDeclaration) {
		_toJavaStatement((XVariableDeclaration) obj, appendable, isReferenced);
	} else if (obj instanceof XWhileExpression) {
		_toJavaStatement((XWhileExpression) obj, appendable, isReferenced);
	} else if (obj instanceof XListLiteral) {
		_toJavaStatement((XListLiteral) obj, appendable, isReferenced);
	} else if (obj instanceof XSetLiteral) {
		_toJavaStatement((XSetLiteral) obj, appendable, isReferenced);
	} else if (obj instanceof XSynchronizedExpression) {
		_toJavaStatement((XSynchronizedExpression) obj, appendable, isReferenced);
	} else {
		super.doInternalToJavaStatement(obj, appendable, isReferenced);
	}
}
 

import org.eclipse.xtext.xbase.XBasicForLoopExpression; //导入依赖的package包/类
/**
 * @param isReferenced unused in this context but necessary for dispatch signature 
 */
protected void toJavaBasicForStatement(XBasicForLoopExpression expr, ITreeAppendable b, boolean isReferenced) {
	ITreeAppendable loopAppendable = b.trace(expr);
	loopAppendable.openPseudoScope();
	loopAppendable.newLine().append("for (");
	
	EList<XExpression> initExpressions = expr.getInitExpressions();
	XExpression firstInitExpression = IterableExtensions.head(initExpressions);
	if (firstInitExpression instanceof XVariableDeclaration) {
		XVariableDeclaration variableDeclaration = (XVariableDeclaration) firstInitExpression;
		LightweightTypeReference type = appendVariableTypeAndName(variableDeclaration, loopAppendable);
		loopAppendable.append(" = ");
		if (variableDeclaration.getRight() != null) {
			compileAsJavaExpression(variableDeclaration.getRight(), loopAppendable, type);
		} else {
			appendDefaultLiteral(loopAppendable, type);
		}
	} else {
		for (int i = 0; i < initExpressions.size(); i++) {
			if (i != 0) {
				loopAppendable.append(", ");
			}
			XExpression initExpression = initExpressions.get(i);
			compileAsJavaExpression(initExpression, loopAppendable, getLightweightType(initExpression));
		}
	}
	
	loopAppendable.append(";");
	
	XExpression expression = expr.getExpression();
	if (expression != null) {
		loopAppendable.append(" ");
		internalToJavaExpression(expression, loopAppendable);
	}
	loopAppendable.append(";");
	
	EList<XExpression> updateExpressions = expr.getUpdateExpressions();
	for (int i = 0; i < updateExpressions.size(); i++) {
		if (i != 0) {
			loopAppendable.append(",");
		}
		loopAppendable.append(" ");
		XExpression updateExpression = updateExpressions.get(i);
		internalToJavaExpression(updateExpression, loopAppendable);
	}
	loopAppendable.append(") {").increaseIndentation();
	
	XExpression eachExpression = expr.getEachExpression();
	internalToJavaStatement(eachExpression, loopAppendable, false);
	
	loopAppendable.decreaseIndentation().newLine().append("}");
	loopAppendable.closeScope();
}
 

import org.eclipse.xtext.xbase.XBasicForLoopExpression; //导入依赖的package包/类
protected void toJavaWhileStatement(XBasicForLoopExpression expr, ITreeAppendable b, boolean isReferenced) {
	ITreeAppendable loopAppendable = b.trace(expr);
	
	boolean needBraces = !bracesAreAddedByOuterStructure(expr);
	if (needBraces) {
		loopAppendable.newLine().increaseIndentation().append("{");
		loopAppendable.openPseudoScope();
	}
	
	EList<XExpression> initExpressions = expr.getInitExpressions();
	for (int i = 0; i < initExpressions.size(); i++) {
		XExpression initExpression = initExpressions.get(i);
		if (i < initExpressions.size() - 1) {
			internalToJavaStatement(initExpression, loopAppendable, false);
		} else {
			internalToJavaStatement(initExpression, loopAppendable, isReferenced);
			if (isReferenced) {
				loopAppendable.newLine().append(getVarName(expr, loopAppendable)).append(" = (");
				internalToConvertedExpression(initExpression, loopAppendable, getLightweightType(expr));
				loopAppendable.append(");");
			}
		}
	}

	final String varName = loopAppendable.declareSyntheticVariable(expr, "_while");
	
	XExpression expression = expr.getExpression();
	if (expression != null) {
		internalToJavaStatement(expression, loopAppendable, true);
		loopAppendable.newLine().append("boolean ").append(varName).append(" = ");
		internalToJavaExpression(expression, loopAppendable);
		loopAppendable.append(";");
	} else {
		loopAppendable.newLine().append("boolean ").append(varName).append(" = true;");
	}
	loopAppendable.newLine();
	loopAppendable.append("while (");
	loopAppendable.append(varName);
	loopAppendable.append(") {").increaseIndentation();
	loopAppendable.openPseudoScope();
	
	XExpression eachExpression = expr.getEachExpression();
	internalToJavaStatement(eachExpression, loopAppendable, false);
	
	EList<XExpression> updateExpressions = expr.getUpdateExpressions();
	if (!updateExpressions.isEmpty()) {
		for (XExpression updateExpression : updateExpressions) {
			internalToJavaStatement(updateExpression, loopAppendable, false);
		}
	}
	
	if (!isEarlyExit(eachExpression)) {
		if (expression != null) {
			internalToJavaStatement(expression, loopAppendable, true);
			loopAppendable.newLine().append(varName).append(" = ");
			internalToJavaExpression(expression, loopAppendable);
			loopAppendable.append(";");
		} else {
			loopAppendable.newLine().append(varName).append(" = true;");
		}
	}
	
	loopAppendable.closeScope();
	loopAppendable.decreaseIndentation().newLine().append("}");
	
	if (needBraces) {
		loopAppendable.closeScope();
		loopAppendable.decreaseIndentation().newLine().append("}");
	}
}