private static Equation BuildEquationAndPutItToVariables(
EquationSyntaxNode equation,
IFunctionDictionary functionsDictionary,
VariableDictionary variables,
TypeInferenceResults typeInferenceResults)
{
var expression = ExpressionBuilderVisitor.BuildExpression(
node: equation.Expression,
functions: functionsDictionary,
outputType: equation.OutputType,
variables: variables,
typeInferenceResults: typeInferenceResults,
typesConverter: TicTypesConverter.Concrete);
VariableSource outputVariableSource;
if (equation.OutputTypeSpecified)
{
outputVariableSource = VariableSource.CreateWithStrictTypeLabel(
name: equation.Id,
type: equation.OutputType,
typeSpecificationIntervalOrNull: equation.TypeSpecificationOrNull.Interval,
attributes: equation.Attributes,
isOutput: true);
}
else
{
outputVariableSource = VariableSource.CreateWithoutStrictTypeLabel(
name: equation.Id,
type: equation.OutputType,
isOutput: true,
equation.Attributes);
}
var itVariable = variables.GetSuperAnonymousVariableOrNull();
if (itVariable != null)
{
throw FunParseException.ErrorStubToDo("Variable cannot starts with it");
}
if (!variables.TryAdd(outputVariableSource))
{
//some equation referenced the source before
var usages = variables.GetUsages(equation.Id);
if (usages.Source.IsOutput)
{
throw ErrorFactory.OutputNameWithDifferentCase(equation.Id, equation.Expression.Interval);
}
else
{
throw ErrorFactory.CannotUseOutputValueBeforeItIsDeclared(usages);
}
}
//ReplaceInputType
if (outputVariableSource.Type != expression.Type)
{
throw new ImpossibleException("fitless");
}
return(new Equation(equation.Id, expression, outputVariableSource));
}