/// Parses a string into multiple exressions, and returns an array of any values calculated.
/// Does not include null values in the array (ie. when define statements are interpreted).
/// Environment defaults to standard library.
public static TruVal[] InterpretAll(string code, Environment env = null)
{
env = env ?? TruLibrary.Library;
TruStatement[] exprs = TruStatement.ParseAll(code);
List <TruVal> rtrnVals = new List <TruVal>();
foreach (TruStatement expr in exprs)
{
TruVal result = expr.Interpret(env);
if (result != null)
{
rtrnVals.Add(result);
}
}
return(rtrnVals.ToArray());
}
/// Launches a REPL where you can evaluate Tru statements.
static void Main(string[] args)
{
Console.WriteLine(shortHelpStr);
Environment global = TruLibrary.Library;
while (true)
{
Console.Write(">>> ");
string input = Console.ReadLine();
if (input == "quit" || input == "exit")
{
return;
}
else if (input == "help")
{
Console.WriteLine(helpStr);
}
else
{
try {
TruStatement[] statements = TruStatement.ParseAll(input);
foreach (TruStatement statement in statements)
{
TruVal result = statement.Interpret(global);
if (result != null)
{
Console.WriteLine(result);
}
}
} catch (TruSyntaxError e) {
Console.WriteLine($"Syntax Error: {e.Message}");
} catch (TruRuntimeException e) {
Console.WriteLine($"Runtime Exception: {e.Message}");
}
}
}
}
/// Parses a string into Tru abstract syntax that can be Executed.
public static TruStatement Parse(string code)
{
return(TruStatement.Parse(ExprTree.Parse(code)));
}
/// Parses and Interprets a string. Environment defaults to the standard library.
public static TruVal Interpret(string code, Environment env = null)
{
env = env ?? TruLibrary.Library;
return(TruStatement.Parse(code).Interpret(env));
}