/// <summary>
/// Adds a constant.
/// </summary>
/// <returns>The constant.</returns>
/// <param name="id">Identifier.</param>
/// <param name="type">Type.</param>
public static Variable AddConstant(string id, GraphicFooType type)
{
if (constants.Contains(id))
{
return(constants.ReadVariable(id));
}
Variable variable = new Variable(id, type);
constants.AddVariable(variable);
return(variable);
}
/// <summary>
/// Finds a variable on a given scope.
/// </summary>
/// <returns>The variable.</returns>
/// <param name="scope">Scope.</param>
/// <param name="id">Identifier.</param>
public static Variable FindVariable(Procedure scope, string id)
{
Variable variable = null;
// Variables are only found on a procedure if a scope is given
if (scope != null)
{
variable = scope.ReadVariable(id);
if (variable != null)
{
return(variable);
}
}
// Continue search on globals
variable = globalVariables.ReadVariable(id);
if (variable != null)
{
return(variable);
}
variable = globalTemporary.ReadVariable(id);
if (variable != null)
{
return(variable);
}
variable = constants.ReadVariable(id);
if (variable != null)
{
return(variable);
}
Console.WriteLine(
"Variable {0} not found on scope {1}",
id,
(scope == null) ? "global" : scope.name
);
return(variable);
}
/// <summary>
/// Reads a variable from the procedure.
/// </summary>
/// <returns>The variable.</returns>
/// <param name="id">Identifier.</param>
public Variable ReadVariable(string id)
{
// Search first in parameters, then in local variables and last in
// temporary variables
Variable variable = parameters.ReadVariable(id);
if (variable == null)
{
variable = procedureVariables.ReadVariable(id);
}
if (variable == null)
{
variable = temporaryVariables.ReadVariable(id);
}
return(variable);
}
