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public abstract GetExpressionType ( ) : |
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/// <summary>
/// Checks an expression associated to a model element
/// </summary>
/// <param name="model">The model element on which the expression is defined</param>
/// <param name="expression">The expression to check</param>
/// <returns>the expression parse tree</returns>
private Interpreter.Expression checkExpression(ModelElement model, string expression)
{
Interpreter.Expression retVal = null;
Interpreter.Parser parser = model.EFSSystem.Parser;
try
{
retVal = parser.Expression(model, expression);
if (retVal != null)
{
retVal.checkExpression();
Types.Type type = retVal.GetExpressionType();
if (type == null)
{
model.AddError("Cannot determine expression type (5) for " + retVal.ToString());
}
}
else
{
model.AddError("Cannot parse expression");
}
}
catch (Exception exception)
{
model.AddException(exception);
}
return(retVal);
}
private void CheckActualAgainstFormal(Dictionary <string, Expression> actuals, Expression expression, Parameter parameter)
{
actuals[parameter.Name] = expression;
expression.checkExpression();
Types.Type argumentType = expression.GetExpressionType();
if (argumentType == null)
{
AddError("Cannot evaluate argument type for argument " + expression.ToString());
}
else
{
if (parameter.Type == null)
{
AddError("Cannot evaluate formal parameter type for " + parameter.Name);
}
else
{
if (!parameter.Type.Match(argumentType))
{
AddError("Invalid argument " + expression.ToString() + " type, expected " + parameter.Type.FullName + ", actual " + argumentType.FullName);
}
}
}
}
public override void visit(Generated.Expectation obj, bool subNodes)
{
Tests.Expectation expect = obj as Tests.Expectation;
if (expect != null)
{
try
{
expect.Messages.Clear();
if (!expect.Expression.Contains("%"))
{
Interpreter.Expression expression = checkExpression(expect, expect.Expression);
if (!expect.EFSSystem.BoolType.Match(expression.GetExpressionType()))
{
expect.AddError("Expression type should be Boolean");
}
}
if (expect.getCondition() != null && !expect.getCondition().Contains("%"))
{
Interpreter.Expression expression = checkExpression(expect, expect.getCondition());
if (!expect.EFSSystem.BoolType.Match(expression.GetExpressionType()))
{
expect.AddError("Condition type should be Boolean");
}
}
}
catch (Exception exception)
{
expect.AddException(exception);
}
}
base.visit(obj, subNodes);
}
/// <summary>
/// Checks the expression and appends errors to the root tree node when inconsistencies are found
/// </summary>
public override void CheckExpression()
{
Structure structureType = Structure.GetExpressionType() as Structure;
if (structureType != null)
{
if (structureType.IsAbstract)
{
AddError("Instantiation of abstract types is forbidden", RuleChecksEnum.SyntaxError);
}
foreach (KeyValuePair <Designator, Expression> pair in Associations)
{
Designator name = pair.Key;
Expression expression = pair.Value;
List <INamable> targets = new List <INamable>();
structureType.Find(name.Image, targets);
if (targets.Count > 0)
{
expression.CheckExpression();
Type type = expression.GetExpressionType();
if (type != null)
{
if (type.IsAbstract)
{
AddError("Instantiation of abstract types is forbidden", RuleChecksEnum.SyntaxError);
}
else
{
foreach (INamable namable in targets)
{
ITypedElement element = namable as ITypedElement;
if (element != null && element.Type != null)
{
if (!element.Type.Match(type))
{
AddError("Expression " + expression + " type (" + type.FullName +
") does not match the target element " + element.Name + " type (" +
element.Type.FullName + ")", RuleChecksEnum.SyntaxError);
}
}
}
}
}
else
{
AddError("Expression " + expression + " type cannot be found", RuleChecksEnum.SyntaxError);
}
}
else
{
Root.AddError("Cannot find " + name + " in structure " + Structure);
}
}
}
else
{
AddError("Cannot find structure type " + Structure, RuleChecksEnum.SyntaxError);
}
}
/// <summary>
/// Provides the type of this expression
/// </summary>
/// <param name="context">The interpretation context</param>
/// <returns></returns>
public override Types.Type GetExpressionType()
{
Functions.Function retVal = (Functions.Function)Generated.acceptor.getFactory().createFunction();
retVal.Name = ToString();
retVal.ReturnType = Expression.GetExpressionType();
foreach (Parameter parameter in Parameters)
{
Parameter param = (Parameter)Generated.acceptor.getFactory().createParameter();
param.Name = parameter.Name;
param.Type = parameter.Type;
retVal.appendParameters(param);
}
retVal.Enclosing = Root;
return(retVal);
}
/// <summary>
/// Checks the expression and appends errors to the root tree node when inconsistencies are found
/// </summary>
public override void checkExpression()
{
Types.Structure structureType = Structure.GetExpressionType() as Types.Structure;
if (structureType != null)
{
foreach (KeyValuePair <string, Expression> pair in Associations)
{
string name = pair.Key;
Expression expression = pair.Value;
List <Utils.INamable> targets = new List <Utils.INamable>();
structureType.Find(name, targets);
if (targets.Count > 0)
{
expression.checkExpression();
Types.Type type = expression.GetExpressionType();
if (type != null)
{
foreach (Utils.INamable namable in targets)
{
Types.ITypedElement element = namable as Types.ITypedElement;
if (element != null && element.Type != null)
{
if (!element.Type.Match(type))
{
AddError("Expression " + expression.ToString() + " type (" + type.FullName + ") does not match the target element " + element.Name + " type (" + element.Type.FullName + ")");
}
}
}
}
else
{
AddError("Expression " + expression.ToString() + " type cannot be found");
}
}
else
{
Root.AddError("Cannot find " + name + " in structure " + Structure.ToString());
}
}
}
else
{
AddError("Cannot find structure type " + Structure.ToString());
}
}
public override void visit(Generated.PreCondition obj, bool subNodes)
{
Rules.PreCondition preCondition = obj as Rules.PreCondition;
if (preCondition != null)
{
try
{
// Check whether the expression is valid
Interpreter.Expression expression = checkExpression(preCondition, preCondition.Condition);
if (!preCondition.Dictionary.EFSSystem.BoolType.Match(expression.GetExpressionType()))
{
preCondition.AddError("Expression type should be Boolean");
}
Types.ITypedElement element = OverallTypedElementFinder.INSTANCE.findByName(preCondition, preCondition.findVariable());
if (element != null)
{
if (element.Type is Types.StateMachine)
{
if (preCondition.findOperator() != null)
{
if (preCondition.findOperator().CompareTo("==") == 0)
{
preCondition.AddWarning("Operator == should not be used for state machines");
}
else if (preCondition.findOperator().CompareTo("!=") == 0)
{
preCondition.AddWarning("Operator != should not be used for state machines");
}
}
}
}
}
catch (Exception exception)
{
preCondition.AddException(exception);
}
}
base.visit(obj, subNodes);
}
/// <summary>
/// Provides the type of this expression
/// </summary>
/// <returns></returns>
public override Type GetExpressionType()
{
Type retVal = null;
if (Term != null)
{
retVal = Term.GetExpressionType();
}
else if (Expression != null)
{
if (Not.Equals(UnaryOp))
{
Type type = Expression.GetExpressionType();
if (type is BoolType)
{
retVal = type;
}
else
{
AddError("Cannot apply NOT on non boolean types", RuleChecksEnum.SemanticAnalysisError);
}
}
else if (Minus.Equals(UnaryOp))
{
Type type = Expression.GetExpressionType();
if (type == EfsSystem.Instance.IntegerType || type == EfsSystem.Instance.DoubleType || type is Range)
{
retVal = type;
}
else
{
AddError("Cannot apply - on non integral types", RuleChecksEnum.SemanticAnalysisError);
}
}
else
{
retVal = Expression.GetExpressionType();
}
}
return(retVal);
}
/// <summary>
/// Checks the expression and appends errors to the root tree node when inconsistencies are found
/// </summary>
public override void CheckExpression()
{
base.CheckExpression();
InitialValue.CheckExpression();
Type initialValueType = InitialValue.GetExpressionType();
if (initialValueType != null)
{
Expression.CheckExpression();
Type expressionType = Expression.GetExpressionType();
if (expressionType != null)
{
if (expressionType != initialValueType)
{
AddError("Expression " + Expression + " has not the same type (" + expressionType.FullName +
" than initial value " + InitialValue + " type " + initialValueType.FullName, RuleChecksEnum.SemanticAnalysisError);
}
}
else
{
AddError("Cannot determine type of expression " + Expression, RuleChecksEnum.SemanticAnalysisError);
}
Type conditionType = Condition.GetExpressionType();
if (conditionType != null)
{
if (!(conditionType is BoolType))
{
AddError("Condition " + Condition + " does not evaluate to a boolean", RuleChecksEnum.SemanticAnalysisError);
}
}
else
{
AddError("Cannot determine type of condition " + Condition, RuleChecksEnum.SyntaxError);
}
}
else
{
AddError("Cannot determine type of the initial value " + InitialValue, RuleChecksEnum.SemanticAnalysisError);
}
}
/// <summary>
/// Provides the type of this expression
/// </summary>
/// <param name="context">The interpretation context</param>
/// <returns></returns>
public override Types.Type GetExpressionType()
{
Types.Type retVal = null;
if (Term != null)
{
retVal = Term.GetExpressionType();
}
else if (Expression != null)
{
if (NOT.CompareTo(UnaryOp) == 0)
{
Types.Type type = Expression.GetExpressionType();
if (type is Types.BoolType)
{
retVal = type;
}
else
{
AddError("Cannot apply NOT on non boolean types");
}
}
else if (MINUS.CompareTo(UnaryOp) == 0)
{
Types.Type type = Expression.GetExpressionType();
if (type == EFSSystem.IntegerType || type == EFSSystem.DoubleType || type is Types.Range)
{
retVal = type;
}
else
{
AddError("Cannot apply - on non integral types");
}
}
else
{
retVal = Expression.GetExpressionType();
}
}
return(retVal);
}
/// <summary>
/// Checks the expression and appends errors to the root tree node when inconsistencies are found
/// </summary>
/// <param name="context">The interpretation context</param>
public override void checkExpression()
{
base.checkExpression();
InitialValue.checkExpression();
Types.Type initialValueType = InitialValue.GetExpressionType();
if (initialValueType != null)
{
Expression.checkExpression();
Types.Type expressionType = Expression.GetExpressionType();
if (expressionType != null)
{
if (expressionType != initialValueType)
{
AddError("Expression " + Expression + " has not the same type (" + expressionType.FullName + " than initial value " + InitialValue + " type " + initialValueType.FullName);
}
}
else
{
AddError("Cannot determine type of expression " + Expression);
}
Types.Type conditionType = Condition.GetExpressionType();
if (conditionType != null)
{
if (!(conditionType is Types.BoolType))
{
AddError("Condition " + Condition + " does not evaluate to a boolean");
}
}
else
{
AddError("Cannot determine type of condition " + Condition);
}
}
else
{
AddError("Cannot determine type of the initial value " + InitialValue);
}
}
private void CheckActualAgainstFormal(Dictionary<string, Expression> actuals, Expression expression, Parameter parameter)
{
actuals[parameter.Name] = expression;
expression.checkExpression();
Types.Type argumentType = expression.GetExpressionType();
if (argumentType == null)
{
AddError("Cannot evaluate argument type for argument " + expression.ToString());
}
else
{
if (parameter.Type == null)
{
AddError("Cannot evaluate formal parameter type for " + parameter.Name);
}
else
{
if (!parameter.Type.Match(argumentType))
{
AddError("Invalid argument " + expression.ToString() + " type, expected " + parameter.Type.FullName + ", actual " + argumentType.FullName);
}
}
}
}
/// <summary>
/// Provides the type of this expression
/// </summary>
/// <returns></returns>
public override Type GetExpressionType()
{
return(Expression.GetExpressionType());
}
/// <summary>
/// Ensures that the parameter provided corresponds to a function double->double
/// </summary>
/// <param name="root">Element on which the errors shall be attached</param>
/// <param name="context">The context used to evaluate the expression</param>
/// <param name="expression">The expression which references the function</param>
/// <param name="count">the expected number of parameters</param>
protected virtual void CheckFunctionalParameter(ModelElement root, InterpretationContext context,
Expression expression, int count)
{
Type type = expression.GetExpressionType();
Function function = type as Function;
if (function != null)
{
if (function.FormalParameters.Count == count)
{
foreach (Parameter parameter in function.FormalParameters)
{
if (!parameter.Type.IsDouble())
{
root.AddError(expression.ToString() + " does not takes a double for parameter " +
parameter.Name);
}
}
}
else
{
root.AddError(expression.ToString() + " does not take " + count + "parameter(s) as input");
}
if (!function.ReturnType.IsDouble())
{
root.AddError(expression.ToString() + " does not return a double");
}
}
else
{
if (!type.IsDouble())
{
root.AddError(expression.ToString() + " type is not double");
}
}
}