/// <summary>
/// Performs a syntax check on a provided Algo script. Throws a compile error if failing.
/// </summary>
private static void SyntaxCheck(string script, int dependencyLineCount)
{
//Read in the input.
var chars = new AntlrInputStream(script);
var lexer = new algoLexer(chars);
var tokens = new CommonTokenStream(lexer);
//Attempt to parse.
var parser = new algoParser(tokens);
parser.BuildParseTree = true;
var tree = parser.compileUnit();
//Walk the tree, check if there are any compile exceptions.
//Is there any content?
if (tree.block() == null)
{
Error.FatalCompile("No valid content was found to compile in the provided Algo script.");
}
//Walk all children.
foreach (var child in tree.block().statement())
{
//Does this one have an exception?
if (child.exception != null && child.exception != default(RecognitionException))
{
Error.FatalCompile("Syntax error in provided Algo script, at original file line " + (child.Start.Line - dependencyLineCount + 1) + ".");
}
}
Log("Script statement syntax check passed successfully.", ALECEvent.Success);
}
//Runs an Algo script, given a file path.
public void RunAlgoScript(string path, string newScopeName = "")
{
//Read the entire text file into a lexer and tokens.
string input = File.ReadAllText(path);
var chars = new AntlrInputStream(input);
var lexer = new algoLexer(chars);
var tokens = new CommonTokenStream(lexer);
//Parse the file.
var parser = new algoParser(tokens);
parser.BuildParseTree = true;
var tree = parser.compileUnit();
//Set the currently loaded file.
FileInfo fi = new FileInfo(path);
string oldFile = AlgoRuntimeInformation.FileLoaded;
AlgoRuntimeInformation.FileLoaded = fi.Name;
//If this is being placed in a separate scope, switch out now.
AlgoScopeCollection oldScope = null;
if (newScopeName != "")
{
oldScope = Scopes;
Scopes = new AlgoScopeCollection();
}
//Visit this tree, and fully execute.
VisitCompileUnit(tree);
//Set the currently loaded file back.
AlgoRuntimeInformation.FileLoaded = oldFile;
//If it was executed in a separate scope, save as a library with this name.
if (newScopeName != "")
{
AlgoScopeCollection importScope = Scopes;
Scopes = oldScope;
Scopes.AddLibrary(newScopeName, importScope);
}
}
/// <summary>
/// Runs Algo in "inline" mode (no package manager, etc). Returns an exit code.
/// </summary>
private static int RunAlgoInline(InlineCLIOptions opts, string[] originalArgs)
{
//Set developer mode on if necessary.
if (opts.DeveloperMode)
{
AlgoRuntimeInformation.DeveloperMode = true;
}
if (opts.TestMode)
{
AlgoRuntimeInformation.UnitTestMode = true;
}
//Displaying any generic info and then shutting off?
if (opts.ShowVersionOnly)
{
PrintVersionInfo(); return(0);
}
//Compiling a file?
if (opts.Compile != null)
{
//Attempt to compile.
ALEC.Compile(opts.Compile);
return(0);
}
//Running the script interpreter, or the live interpreter?
if (opts.ScriptFile == null)
{
//Run live.
//Print version info. If --nohead is on, then the header info for the interpreter is skipped.
if (!opts.NoHeader)
{
PrintVersionInfo();
Console.WriteLine("Starting interpreter...\n");
}
//Create a visitor.
if (visitor == null)
{
visitor = new algoVisitor();
//Load core library.
visitor.LoadCoreLibrary();
}
//Interactive interpreter.
while (true)
{
Console.Write(">> ");
string line = Console.ReadLine();
//Catch keywords and null strings.
if (line == "quit" || line == "exit" || line == "stop")
{
break;
}
if (line == "help")
{
PrintHelp(); continue;
}
if (line == "clear")
{
Console.Clear(); continue;
}
if (line == "")
{
continue;
}
//Parse line.
var s_chars = new AntlrInputStream(line);
var s_lexer = new algoLexer(s_chars);
var s_tokens = new CommonTokenStream(s_lexer);
var s_parse = new algoParser(s_tokens);
//Turn on continuous mode.
AlgoRuntimeInformation.ContinuousMode = true;
//Execute.
s_parse.BuildParseTree = true;
var s_tree = s_parse.compileUnit();
try
{
visitor.VisitCompileUnit(s_tree);
}
catch (Exception e)
{
//Internal exception.
if (!AlgoRuntimeInformation.UnitTestMode)
{
Error.Internal(e.Message);
}
else
{
throw e;
}
}
}
return(0);
}
else
{
//Run normal script.
//Does the given file location exist?
string fullPath = CPFilePath.GetPlatformFilePath(new string[] { Environment.CurrentDirectory, opts.ScriptFile });
if (!File.Exists(fullPath))
{
Error.FatalNoContext("No file with the name '" + opts.ScriptFile + "' exists relative to your current directory.");
return(-1);
}
//Loading in the file arguments.
List <string> args = originalArgs.ToList();
args.RemoveAll(x => x.StartsWith("-"));
algoVisitor.SetConsoleArguments(args.Skip(1).ToArray());
//Read in the input.
AlgoRuntimeInformation.FileLoaded = opts.ScriptFile;
string input = File.ReadAllText(fullPath);
var chars = new AntlrInputStream(input);
var lexer = new algoLexer(chars);
var tokens = new CommonTokenStream(lexer);
//Debug print.
if (AlgoRuntimeInformation.DeveloperMode)
{
ANTLRDebug.PrintTokens(lexer);
}
//Debug print tree.
var parser = new algoParser(tokens);
parser.BuildParseTree = true;
var tree = parser.compileUnit();
if (AlgoRuntimeInformation.DeveloperMode)
{
ANTLRDebug.PrintParseList(tree, parser);
//Add a gap.
Console.WriteLine(" --------------------\n | BEGIN EVALUATION |\n --------------------\n");
}
//Walking the tree.
visitor = new algoVisitor();
visitor.LoadCoreLibrary();
visitor.VisitCompileUnit(tree);
if (AlgoRuntimeInformation.DeveloperMode)
{
Console.ForegroundColor = ConsoleColor.Gray;
Console.WriteLine("\n ------------------\n | END EVALUATION |\n ------------------\n");
//Print variables.
ANTLRDebug.PrintScopes();
}
return(0);
}
}