public void CreateIndexedExpression()
{
IndexedExpression expr = new IndexedExpression(new ConstantExpression("foo"), new ConstantExpression(0));
Assert.AreEqual("foo", expr.TargetExpression.Evaluate(null));
Assert.AreEqual(0, expr.IndexExpression.Evaluate(null));
}
public void GetIndexedStringOutOfBound()
{
Machine machine = new Machine();
IndexedExpression expression = new IndexedExpression(new ConstantExpression("foo"), new ConstantExpression(10));
var result = expression.Evaluate(machine.RootContext);
Assert.IsNull(result);
}
public void GetIndexedStringNegativeIndexAsNil()
{
Machine machine = new Machine();
IndexedExpression expression = new IndexedExpression(new ConstantExpression("bar"), new ConstantExpression(-10));
var result = expression.Evaluate(machine.RootContext);
Assert.IsNull(result);
}
public void EvaluateIndexedExpressionListInteger()
{
var list = new List <int>()
{
1, 2, 3
};
IndexedExpression expr = new IndexedExpression(new ConstantExpression(list), new ConstantExpression(1));
Assert.AreEqual(2, expr.Evaluate(null));
}
public void ParseSimpleIndexedExpression()
{
Parser parser = new Parser("a[1]");
var expected = new IndexedExpression(new NameExpression("a"), new ConstantExpression(1));
var result = parser.ParseExpression();
Assert.IsNotNull(result);
Assert.AreEqual(expected, result);
Assert.IsNull(parser.ParseCommand());
}
public void GetIndexedString()
{
Machine machine = new Machine();
IndexedExpression expression = new IndexedExpression(new ConstantExpression("foo"), new ConstantExpression(0));
var result = expression.Evaluate(machine.RootContext);
Assert.IsNotNull(result);
Assert.AreEqual("f", result);
}
/// <summary>
/// Sets the <see cref="ICSharpOutputNode.WriteDown"/> flag.
/// </summary>
public override void SetWriteDown()
{
if (WriteDown)
{
return;
}
WriteDown = true;
IndexedExpression.SetWriteDown();
FeatureCall.SetWriteDown();
}
public void GetIndexedOutOfBandValue()
{
Machine machine = new Machine();
machine.ExecuteText("a = [1,2,3]");
IndexedExpression expression = new IndexedExpression(new NameExpression("a"), new ConstantExpression(10));
var result = expression.Evaluate(machine.RootContext);
Assert.IsNull(result);
}
public void GetIndexedNegativeValue()
{
Machine machine = new Machine();
machine.ExecuteText("a = [1,2,3]");
IndexedExpression expression = new IndexedExpression(new NameExpression("a"), new ConstantExpression(-1));
var result = expression.Evaluate(machine.RootContext);
Assert.IsNotNull(result);
Assert.AreEqual(3, result);
}
/// <summary>
/// Gets the source code corresponding to the expression.
/// </summary>
/// <param name="writer">The stream on which to write.</param>
/// <param name="expressionContext">The context.</param>
/// <param name="skippedIndex">Index of a destination to skip.</param>
public override void WriteCSharp(ICSharpWriter writer, ICSharpExpressionContext expressionContext, int skippedIndex)
{
Debug.Assert(WriteDown);
ICSharpExpressionContext SourceExpressionContext = new CSharpExpressionContext();
IndexedExpression.WriteCSharp(writer, SourceExpressionContext, -1);
string IndexedText = SourceExpressionContext.ReturnValue;
CSharpArgument.CSharpArgumentList(writer, expressionContext, FeatureCall, -1, false, out string ArgumentListText, out IList <string> OutgoingResultList);
expressionContext.SetSingleReturnValue($"{IndexedText}[{ArgumentListText}]");
}
public void GetIndexedDictionaryEntryAsNil()
{
Machine machine = new Machine();
var hash = new DynamicHash();
hash[new Symbol("one")] = 1;
hash[new Symbol("two")] = 2;
IndexedExpression expression = new IndexedExpression(new ConstantExpression(hash), new ConstantExpression(new Symbol("three")));
var result = expression.Evaluate(machine.RootContext);
Assert.IsNull(result);
}
public override void GenerateCode(ILCodeGenerator cg)
{
//generamos la expresion a la que se le hace []
IndexedExpression.GenerateCode(cg);
//generamos el indice
Index.GenerateCode(cg);
//cargamos el elemento del array
if (LoadVariableInTheStack)
{
cg.ILGenerator.Emit(OpCodes.Ldelem, IndexedExpression.NodeInfo.ElementsType.ILType);
}
}
public void Equals()
{
IndexedExpression expr1 = new IndexedExpression(new NameExpression("a"), new ConstantExpression(1));
IndexedExpression expr2 = new IndexedExpression(new NameExpression("a"), new ConstantExpression(2));
IndexedExpression expr3 = new IndexedExpression(new NameExpression("b"), new ConstantExpression(1));
IndexedExpression expr4 = new IndexedExpression(new NameExpression("a"), new ConstantExpression(1));
Assert.IsTrue(expr1.Equals(expr4));
Assert.IsTrue(expr4.Equals(expr1));
Assert.AreEqual(expr1.GetHashCode(), expr4.GetHashCode());
Assert.IsFalse(expr1.Equals(expr2));
Assert.IsFalse(expr2.Equals(expr1));
Assert.IsFalse(expr1.Equals(expr3));
Assert.IsFalse(expr3.Equals(expr1));
Assert.IsFalse(expr1.Equals(null));
Assert.IsFalse(expr1.Equals("foo"));
}
private IExpression ParseTerm()
{
IExpression expression = null;
if (this.TryParseToken(TokenType.Operator, "-"))
{
expression = new NegativeExpression(this.ParseTerm());
}
else if (this.TryParseToken(TokenType.Operator, "+"))
{
expression = this.ParseTerm();
}
else if (this.TryParseToken(TokenType.Operator, "!"))
{
expression = new NegationExpression(this.ParseTerm());
}
else
{
expression = this.ParseSimpleTerm();
}
if (expression == null)
{
return(null);
}
while (true)
{
if (this.TryParseToken(TokenType.Separator, "."))
{
string name = this.ParseName();
if (this.TryParseToken(TokenType.Separator, "{"))
{
expression = new DotExpression(expression, name, new IExpression[] { this.ParseBlockExpression(true) });
}
else if (this.NextTokenStartsExpressionList())
{
expression = new DotExpression(expression, name, this.ParseExpressionList());
}
else
{
expression = new DotExpression(expression, name, new IExpression[0]);
}
continue;
}
if (this.TryParseToken(TokenType.Separator, "::"))
{
string name = this.ParseName();
expression = new DoubleColonExpression(expression, name);
continue;
}
if (this.TryParseToken(TokenType.Separator, "["))
{
IExpression indexexpr = this.ParseExpression();
this.ParseToken(TokenType.Separator, "]");
expression = new IndexedExpression(expression, indexexpr);
continue;
}
break;
}
return(expression);
}
public void EvaluateIndexedExpressionStringInteger()
{
IndexedExpression expr = new IndexedExpression(new ConstantExpression("foo"), new ConstantExpression(0));
Assert.AreEqual("f", expr.Evaluate(null));
}
public override void CheckSemantic(SymbolTable symbolTable, List <CompileError> errors)
{
//la politica que se siguio fue al encontrar un error en el array access no seguir buscando errores
//al modo de C#
//chequeamos la IndexedExpression
IndexedExpression.CheckSemantic(symbolTable, errors);
//chequeamos el Index
Index.CheckSemantic(symbolTable, errors);
//si alguno evalua de error entonces este tambien
if (IndexedExpression.NodeInfo.Equals(SemanticInfo.SemanticError) || Index.NodeInfo.Equals(SemanticInfo.SemanticError))
{
///el nodo evalúa de error
NodeInfo = SemanticInfo.SemanticError;
}
//si IndexedExpression no evaluo de error
if (!Object.Equals(IndexedExpression.NodeInfo, SemanticInfo.SemanticError))
{
//IndexedExpression tiene que ser compatible con array
if (!IndexedExpression.NodeInfo.Type.BuiltInType.IsCompatibleWith(BuiltInType.Array))
{
errors.Add(new CompileError
{
Line = IndexedExpression.Line,
Column = IndexedExpression.CharPositionInLine,
ErrorMessage = string.Format("Cannot apply indexing with [] to an expression of type '{0}'", IndexedExpression.NodeInfo.Type.Name),
Kind = ErrorKind.Semantic
});
///el nodo evalúa de error
NodeInfo = SemanticInfo.SemanticError;
}
}
//si Index no evaluo de error
if (!Object.Equals(Index.NodeInfo, SemanticInfo.SemanticError))
{
//Index tiene que ser compatible con int
if (!Index.NodeInfo.BuiltInType.IsCompatibleWith(BuiltInType.Int))
{
errors.Add(new CompileError
{
Line = Index.Line,
Column = Index.CharPositionInLine,
ErrorMessage = string.Format("Cannot implicitly convert type '{0}' to 'int'", Index.NodeInfo.Type.Name),
Kind = ErrorKind.Semantic
});
///el nodo evalúa de error
NodeInfo = SemanticInfo.SemanticError;
}
}
//seteamos los campos necesarios
if (!Object.Equals(NodeInfo, SemanticInfo.SemanticError))
{
NodeInfo.Name = SemanticInfo.NoName;
NodeInfo.ElementKind = SymbolKind.NoSymbol;
NodeInfo.BuiltInType = IndexedExpression.NodeInfo.ElementsType.BuiltInType;
NodeInfo.ElementsType = IndexedExpression.NodeInfo.ElementsType.ElementsType;
NodeInfo.Fields = IndexedExpression.NodeInfo.ElementsType.Fields;
NodeInfo.Type = IndexedExpression.NodeInfo.ElementsType;
//esta linea me parece que no es necesaria
NodeInfo.ILType = IndexedExpression.NodeInfo.ElementsType.ILType;
}
}