/// <summary>
/// Creates a new instance of the <see cref="EvaluationContext"/> class.
/// </summary>
/// <param name="globalFunctions">The global functions of the evaluation context.</param>
/// <param name="globalVariables">The global variables of the evaluation context.</param>
/// <returns>A new immutable instance of the evaluation context.</returns>
public static EvaluationContext Create(FunctionsDictionary globalFunctions,
VariablesDictionary globalVariables)
{
return(new EvaluationContext(
new FunctionsDictionary(globalFunctions),
new VariablesDictionary(globalVariables))); // Makes them immutable
}
private EvaluationContext( // Private ctor forces the creation of evaluation context from Create method
FunctionsDictionary globalFunctions,
VariablesDictionary globalVariables) // Globals are only created once
{
_globalFunctions = globalFunctions;
_globalVariables = globalVariables;
}
/// <summary>
/// Adds a local <see cref="TemplateFunction"/> to the context under the supplied name,
/// overriding any existing <see cref="TemplateFunction"/> with the same name
/// </summary>
public void SetLocalFunction(string name, TemplateFunction function)
{
if (_localFunctions == null)
{
_localFunctions = new FunctionsDictionary();
}
_localFunctions[name] = function;
}
/// <summary>
/// Creates a list of Commands from the temp file
/// </summary>
/// <param name="filePath"></param>
private void CreateCommandList(string filePath)
{
commands.Clear();
commands.Add(new MacroCommand());
using (StreamReader sr = new StreamReader(filePath))
{
while (!sr.EndOfStream)
{
Command newCommand;
var line = sr.ReadLine();
if (line.ElementAt(0) != 'B')
{
ArgStruct args = ParseLine(line);
newCommand = FunctionsDictionary[args._command](args);
}
else
{
newCommand = CreateMacro(new MacroCommand(), sr);
}
commands.Add(newCommand);
}
}
}
/// <summary>
/// Initializes a new instance of the <see cref="EvaluationContext"/> class.
/// Making it private forces the creation of evaluation context from the
/// <see cref="Create(FunctionsDictionary, VariablesDictionary)"/> method.
/// </summary>
/// <param name="globalFunctions">The global functions of the evaluation context.</param>
/// <param name="globalVariables">The global variables of the evaluation context.</param>
private EvaluationContext(FunctionsDictionary globalFunctions, VariablesDictionary globalVariables)
{
_globalFunctions = globalFunctions;
_globalVariables = globalVariables;
}
public FunctionsDictionary(FunctionsDictionary dic) : base(dic, StringComparer.OrdinalIgnoreCase)
{
}
