/// <summary>
/// Adds variable definition to the compiler definitions.
/// </summary>
/// <typeparam name="T">The type of variable</typeparam>
/// <param name="name">The variable name.</param>
/// <param name="constValue">The constant value.</param>
public void DefineConstant <T>(string name, T constValue)
{
var chars = new StringCharacters(name);
if (_variables.ContainsKey(chars) || _constants.ContainsKey(chars))
{
throw new ArgumentException($"Variable or constant of the specified name '{name}' is already defined.", nameof(name));
}
_constants[chars] = constValue;
}
/// <summary>
/// Adds variable definition to the compiler definitions.
/// </summary>
/// <typeparam name="T">The type of variable</typeparam>
/// <param name="name">The variable name.</param>
/// <param name="func">The function to evaluate variable value.</param>
public void DefineVariable <T>(string name, Func <T> func)
{
var chars = new StringCharacters(name);
if (_variables.ContainsKey(chars) || _constants.ContainsKey(chars))
{
throw new ArgumentException($"Variable or constant of the specified name '{name}' is already defined.", nameof(name));
}
_variables[chars] = (() => func.Invoke());
}
/// <summary>
/// Adds the function definition to the compiler definitions.
/// </summary>
/// <param name="name">The function name.</param>
/// <param name="function">The function delegate that evaluates the function value.</param>
/// <param name="paramsCount">The number of function parameters.</param>
public void DefineFunction(string name, Func <object[], object> function, int paramsCount)
{
var c = new StringCharacters(name);
if (!_functionsByNameByArgCount.TryGetValue(c, out var funByArgCount))
{
funByArgCount = new Dictionary <int, Func <object[], object> >();
_functionsByNameByArgCount[c] = funByArgCount;
}
else
{
if (funByArgCount.ContainsKey(paramsCount))
{
throw new ArgumentException($"Function '{name}'({paramsCount} params) is already defined.", nameof(name));
}
}
funByArgCount[paramsCount] = function;
}
