public void AddNativeProperty(string propertyDesc, ScriptCallbackCB callbackCB, object userData)
{
var oldLex = currentLexer;
currentLexer = new ScriptLex(propertyDesc);
var baseVar = Root;
var propName = currentLexer.TokenString;
currentLexer.Match(ScriptLex.LexTypes.Id);
while (currentLexer.TokenType == (ScriptLex.LexTypes) '.')
{
currentLexer.Match((ScriptLex.LexTypes) '.');
var link = baseVar.FindChild(propName);
if (link == null)
{
link = baseVar.AddChild(propName, new ScriptVar(null, ScriptVar.Flags.Object));
}
baseVar = link.Var;
propName = currentLexer.TokenString;
currentLexer.Match(ScriptLex.LexTypes.Id);
}
var propVar = new ScriptVar();
callbackCB.Invoke(propVar, null);
currentLexer = oldLex;
baseVar.AddChild(propName, propVar);
}
public ScriptLex(ScriptLex owner, int start, int end)
{
data = owner.data;
dataOwned = false;
dataStart = start;
dataEnd = end;
Reset();
}
public ScriptLex(ScriptLex owner, Int32 start, Int32 end)
{
_data = owner._data;
_dataOwned = false;
_dataStart = start;
_dataEnd = end;
Reset();
}
public ScriptVarLink EvalComplex(String code)
{
ScriptLex oldLex = _currentLexer;
Stack <ScriptVar> oldScopes = _scopes;
_currentLexer = new ScriptLex(code);
_callStack.Clear();
_scopes.Clear();
_scopes.Push(Root);
ScriptVarLink v = null;
try
{
bool execute = true;
do
{
v = Base(ref execute);
if (_currentLexer.TokenType != ScriptLex.LexTypes.Eof)
{
_currentLexer.Match((ScriptLex.LexTypes) ';');
}
} while (_currentLexer.TokenType != ScriptLex.LexTypes.Eof);
}
catch (ScriptException ex)
{
String errorMessage = ex.Message;
int i = 0;
foreach (ScriptVar scriptVar in _scopes)
{
errorMessage += "\n" + i++ + ": " + scriptVar;
}
#if WINDOWS_UWP
Debug.WriteLine(errorMessage);
#else
Console.Write(errorMessage);
#endif
}
_currentLexer = oldLex;
_scopes = oldScopes;
if (v != null)
{
return(v);
}
return(new ScriptVarLink(new ScriptVar(null), null));
}
public ScriptVarLink EvalComplex(string code)
{
var oldLex = currentLexer;
var oldScopes = scopes;
currentLexer = new ScriptLex(code);
scopes = new List <ScriptVar>();
//callStack.Clear();
scopes.Clear();
scopes.PushBack(Root);
ScriptVarLink v = null;
try
{
var execute = true;
do
{
v = Base(ref execute);
if (currentLexer.TokenType != ScriptLex.LexTypes.Eof)
{
currentLexer.Match((ScriptLex.LexTypes) ';');
}
} while (currentLexer.TokenType != ScriptLex.LexTypes.Eof);
}
catch (ScriptException ex)
{
var errorMessage = new StringBuilder(string.Format("ERROR on line {0} column {1} [{2}]", currentLexer.LineNumber, currentLexer.ColumnNumber, ex.Message));
int i = 0;
foreach (ScriptVar scriptVar in scopes)
{
errorMessage.AppendLine();
errorMessage.Append(i++ + ": " + scriptVar);
}
Console.Error.WriteLine(errorMessage.ToString());
}
currentLexer = oldLex;
scopes = oldScopes;
if (v != null)
{
return(v);
}
return(new ScriptVarLink(new ScriptVar(null), null));
}
public void Execute(string code)
{
var oldLex = currentLexer;
var oldScopes = scopes;
scopes = new List <ScriptVar>();
scopes.Clear();
scopes.PushBack(Root);
var rootLink = new ScriptVarLink(Root, "root");
callStack.Push(rootLink);
using (currentLexer = new ScriptLex(code))
{
var execute = true;
while (currentLexer.TokenType != 0)
{
try
{
Statement(ref execute);
}
catch (Exception ex)
{
if (ex is ScriptException || ex is JITException)
{
var errorMessage = new StringBuilder(string.Format("ERROR on line {0} column {1} [{2}]", currentLexer.LineNumber, currentLexer.ColumnNumber, ex.Message));
Console.Error.WriteLine(errorMessage.ToString());
return;
}
else
{
throw;
}
}
}
}
callStack.Pop();
currentLexer = oldLex;
scopes = oldScopes;
}
public ScriptEngine()
{
currentLexer = null;
scopes = new List <ScriptVar>();
callStack = new Stack <ScriptVarLink>();
Root = (new ScriptVar(null, ScriptVar.Flags.Object)).Ref();
objectClass = (new ScriptVar(null, ScriptVar.Flags.Object)).Ref();
stringClass = (new ScriptVar(null, ScriptVar.Flags.Object)).Ref();
arrayClass = (new ScriptVar(null, ScriptVar.Flags.Object)).Ref();
Root.AddChild("Object", objectClass);
Root.AddChild("String", stringClass);
Root.AddChild("Array", arrayClass);
}
public ScriptEngine(bool loadProviders = true)
{
_currentLexer = null;
_scopes = new Stack <ScriptVar>();
_callStack = new Stack <string>();
Root = (new ScriptVar(null, ScriptVar.Flags.Object)).Ref();
_stringClass = (new ScriptVar(null, ScriptVar.Flags.Object)).Ref();
_objectClass = (new ScriptVar(null, ScriptVar.Flags.Object)).Ref();
_arrayClass = (new ScriptVar(null, ScriptVar.Flags.Object)).Ref();
Root.AddChild("String", _stringClass);
Root.AddChild("Object", _objectClass);
Root.AddChild("Array", _arrayClass);
if (loadProviders)
{
LoadAllFunctionProviders();
}
}
public void AddMethod(String funcProto, ScriptCallbackCB callback, Object userdata)
{
ScriptLex oldLex = _currentLexer;
using (_currentLexer = new ScriptLex(funcProto))
{
ScriptVar baseVar = Root;
_currentLexer.Match(ScriptLex.LexTypes.RFunction);
String funcName = _currentLexer.TokenString;
_currentLexer.Match(ScriptLex.LexTypes.Id);
while (_currentLexer.TokenType == (ScriptLex.LexTypes) '.')
{
_currentLexer.Match((ScriptLex.LexTypes) '.');
ScriptVarLink link = baseVar.FindChild(funcName);
if (link == null)
{
link = baseVar.AddChild(funcName, new ScriptVar(null, ScriptVar.Flags.Object));
}
baseVar = link.Var;
funcName = _currentLexer.TokenString;
_currentLexer.Match(ScriptLex.LexTypes.Id);
}
ScriptVar funcVar = new ScriptVar(null, ScriptVar.Flags.Function | ScriptVar.Flags.Native);
funcVar.SetCallback(callback, userdata);
ParseFunctionArguments(funcVar);
baseVar.AddChild(funcName, funcVar);
}
_currentLexer = oldLex;
}
public void Execute(String code)
{
ScriptLex oldLex = _currentLexer;
Stack <ScriptVar> oldScopes = _scopes;
using (_currentLexer = new ScriptLex(code))
{
_scopes.Clear();
_scopes.Push(Root);
_callStack.Clear();
try
{
while (_currentLexer.TokenType != 0)
{
bool execute = true;
Statement(ref execute);
}
}
catch (ScriptException ex)
{
String errorMessage = String.Format("ERROR on line {0} column {1} [{2}]", _currentLexer.LineNumber, _currentLexer.ColumnNumber, ex.Message);
int i = 0;
foreach (ScriptVar scriptVar in _scopes)
{
errorMessage += "\n" + i++ + ": " + scriptVar;
}
Console.Write(errorMessage);
}
}
_currentLexer = oldLex;
_scopes = oldScopes;
}
public void AddNative(string funcDesc, ScriptCallbackCB callbackCB, object userData)
{
var oldLex = currentLexer;
currentLexer = new ScriptLex(funcDesc);
var baseVar = Root;
currentLexer.Match(ScriptLex.LexTypes.RFunction);
var funcName = currentLexer.TokenString;
currentLexer.Match(ScriptLex.LexTypes.Id);
while (currentLexer.TokenType == (ScriptLex.LexTypes) '.')
{
currentLexer.Match((ScriptLex.LexTypes) '.');
var link = baseVar.FindChild(funcName);
if (link == null)
{
link = baseVar.AddChild(funcName, new ScriptVar(null, ScriptVar.Flags.Object));
}
baseVar = link.Var;
funcName = currentLexer.TokenString;
currentLexer.Match(ScriptLex.LexTypes.Id);
}
var funcVar = new ScriptVar(null, ScriptVar.Flags.Function | ScriptVar.Flags.Native);
funcVar.SetCallback(callbackCB, userData);
ParseFunctionArguments(funcVar);
currentLexer = oldLex;
baseVar.AddChild(funcName, funcVar);
}
private ScriptVarLink FunctionCall(ref bool execute, ScriptVarLink function, ScriptVar parent)
{
if (execute)
{
if (!function.Var.IsFunction)
{
throw new ScriptException(String.Format("{0} is not a function", function.Name));
}
currentLexer.Match((ScriptLex.LexTypes) '(');
var functionRoot = new ScriptVar(null, ScriptVar.Flags.Function);
if (parent != null)
{
functionRoot.AddChildNoDup("this", parent);
}
var v = function.Var.FirstChild;
while (v != null)
{
var value = Base(ref execute);
if (execute)
{
if (value.Var.IsBasic)
{
//pass by val
functionRoot.AddChild(v.Name, value.Var.DeepCopy());
}
else
{
//pass by ref
functionRoot.AddChild(v.Name, value.Var);
}
}
if (currentLexer.TokenType != (ScriptLex.LexTypes) ')')
{
currentLexer.Match((ScriptLex.LexTypes) ',');
}
v = v.Next;
}
currentLexer.Match((ScriptLex.LexTypes) ')');
var returnVarLink = functionRoot.AddChild(ScriptVar.ReturnVarName, null);
scopes.PushBack(functionRoot);
//callStack.PushBack(string.Format("{0} from line {1}", function.Name, currentLexer.LineNumber));
callStack.Push(function);
if (function.Var.IsNative)
{
var func = function.Var.GetCallback();
func?.Invoke(functionRoot, function.Var.GetCallbackUserData());
}
else
{
var oldLex = currentLexer;
var newLex = new ScriptLex(function.Var.String);
currentLexer = newLex;
try
{
Block(ref execute);
execute = true;
}
catch
{
throw;
}
finally
{
currentLexer = oldLex;
}
}
callStack.Pop();
scopes.PopBack();
var returnVar = new ScriptVarLink(returnVarLink.Var, null);
functionRoot.RemoveLink(returnVarLink);
return(returnVar);
}
else
{
//not executing the function, just parsing it out
currentLexer.Match((ScriptLex.LexTypes) '(');
while (currentLexer.TokenType != (ScriptLex.LexTypes) ')')
{
Base(ref execute);
if (currentLexer.TokenType != (ScriptLex.LexTypes) ')')
{
currentLexer.Match((ScriptLex.LexTypes) ',');
}
}
currentLexer.Match((ScriptLex.LexTypes) ')');
if (currentLexer.TokenType == (ScriptLex.LexTypes) '{') //WTF?
{
Block(ref execute);
}
return(function);
}
}
public void Execute(String code)
{
ScriptLex oldLex = _currentLexer;
Stack <ScriptVar> oldScopes = _scopes;
// Preprocess script and expand any libraries if needed
IncludedLibraries.Clear();
foreach (KimonoProperty property in ObiScriptPortfolio.Portfolio.Properties)
{
// Is this a script library?
if (property is KimonoPropertyLibrary)
{
// Yes, see if it has been included in the current script
var token = $"using {property.Name};";
// Included?
if (code.Contains(token))
{
// Yes, is the library already included?
if (LibraryIncluded(property.Name))
{
// Yes, just remove this call
code = code.Replace(token, "");
}
else
{
// No, expand the library into this script and
// mark library as included
code = code.Replace(token, property.ObiScript);
IncludedLibraries.Add(property.Name);
}
}
}
}
using (_currentLexer = new ScriptLex(code))
{
_scopes.Clear();
_scopes.Push(Root);
_callStack.Clear();
// Clear results
ObiScriptEngine.EvaluationResult.Successful = true;
ObiScriptEngine.EvaluationResult.ErrorMessage = "";
ObiScriptEngine.EvaluationResult.Value = this;
try
{
while (_currentLexer.TokenType != 0)
{
bool execute = true;
Statement(ref execute);
}
}
catch (ScriptException ex)
{
// Record error
ObiScriptEngine.EvaluationResult.Successful = false;
ObiScriptEngine.EvaluationResult.ErrorMessage = String.Format("ERROR on line {0} column {1} [{2}]", _currentLexer.LineNumber, _currentLexer.ColumnNumber, ex.Message);
int i = 0;
foreach (ScriptVar scriptVar in _scopes)
{
ObiScriptEngine.EvaluationResult.ErrorMessage += "\n" + i++ + ": " + scriptVar;
}
// Clear result
ObiScriptEngine.EvaluationResult.Value = null;
}
}
_currentLexer = oldLex;
_scopes = oldScopes;
}
private void Statement(ref bool execute)
{
if (_currentLexer.TokenType == ScriptLex.LexTypes.Id ||
_currentLexer.TokenType == ScriptLex.LexTypes.Int ||
_currentLexer.TokenType == ScriptLex.LexTypes.Float ||
_currentLexer.TokenType == ScriptLex.LexTypes.Str ||
_currentLexer.TokenType == (ScriptLex.LexTypes) '-')
{
//execite a basic statement
Base(ref execute);
_currentLexer.Match((ScriptLex.LexTypes) ';');
}
else if (_currentLexer.TokenType == (ScriptLex.LexTypes) '{')
{
//code block
Block(ref execute);
}
else if (_currentLexer.TokenType == (ScriptLex.LexTypes) ';')
{
//allow for multiple semi colon such as ;;;
_currentLexer.Match((ScriptLex.LexTypes) ';');
}
else if (_currentLexer.TokenType == ScriptLex.LexTypes.RVar)
{
//creating variables
//TODO: make this less shit
_currentLexer.Match(ScriptLex.LexTypes.RVar);
while (_currentLexer.TokenType != (ScriptLex.LexTypes) ';')
{
ScriptVarLink a = null;
if (execute)
{
a = _scopes.Peek().FindChildOrCreate(_currentLexer.TokenString);
}
_currentLexer.Match(ScriptLex.LexTypes.Id);
//get through the dots
while (_currentLexer.TokenType == (ScriptLex.LexTypes) '.')
{
_currentLexer.Match((ScriptLex.LexTypes) '.');
if (execute)
{
ScriptVarLink aLast = a;
if (aLast != null)
{
a = aLast.Var.FindChildOrCreate(_currentLexer.TokenString);
}
}
_currentLexer.Match(ScriptLex.LexTypes.Id);
}
//initialiser
if (_currentLexer.TokenType == (ScriptLex.LexTypes) '=')
{
_currentLexer.Match((ScriptLex.LexTypes) '=');
ScriptVarLink varLink = Base(ref execute);
if (execute)
{
if (a != null)
{
a.ReplaceWith(varLink);
}
}
}
if (_currentLexer.TokenType != (ScriptLex.LexTypes) ';')
{
_currentLexer.Match((ScriptLex.LexTypes) ',');
}
}
_currentLexer.Match((ScriptLex.LexTypes) ';');
}
else if (_currentLexer.TokenType == ScriptLex.LexTypes.RIf)
{
//if condition
_currentLexer.Match(ScriptLex.LexTypes.RIf);
_currentLexer.Match((ScriptLex.LexTypes) '(');
ScriptVarLink varLink = Base(ref execute);
_currentLexer.Match((ScriptLex.LexTypes) ')');
bool condition = execute && varLink.Var.GetBool();
bool noExecute = false;
if (condition)
{
Statement(ref execute);
}
else
{
Statement(ref noExecute);
}
if (_currentLexer.TokenType == ScriptLex.LexTypes.RElse)
{
//else part of an if
_currentLexer.Match(ScriptLex.LexTypes.RElse);
if (condition)
{
Statement(ref noExecute);
}
else
{
Statement(ref execute);
}
}
}
else if (_currentLexer.TokenType == ScriptLex.LexTypes.RWhile)
{
//while loop
_currentLexer.Match(ScriptLex.LexTypes.RWhile);
_currentLexer.Match((ScriptLex.LexTypes) '(');
Int32 whileConditionStart = _currentLexer.TokenStart;
ScriptVarLink condition = Base(ref execute);
bool loopCondition = execute && condition.Var.GetBool();
ScriptLex whileCond = _currentLexer.GetSubLex(whileConditionStart);
_currentLexer.Match((ScriptLex.LexTypes) ')');
Int32 whileBodyStart = _currentLexer.TokenStart;
Statement(ref loopCondition);
ScriptLex whileBody = _currentLexer.GetSubLex(whileBodyStart);
ScriptLex oldLex = _currentLexer;
//TODO: possible maximum itteration limit?
while (loopCondition)
{
whileCond.Reset();
_currentLexer = whileCond;
condition = Base(ref execute);
loopCondition = condition.Var.GetBool();
if (loopCondition)
{
whileBody.Reset();
_currentLexer = whileBody;
Statement(ref execute);
}
}
_currentLexer = oldLex;
}
else if (_currentLexer.TokenType == ScriptLex.LexTypes.RFor)
{
//for loop
_currentLexer.Match(ScriptLex.LexTypes.RFor);
_currentLexer.Match((ScriptLex.LexTypes) '(');
Statement(ref execute); //init
int forConditionStart = _currentLexer.TokenStart;
ScriptVarLink condition = Base(ref execute);
bool noExecute = false;
bool loopCondition = execute && condition.Var.GetBool();
ScriptLex forCondition = _currentLexer.GetSubLex(forConditionStart);
_currentLexer.Match((ScriptLex.LexTypes) ';');
int forIterStart = _currentLexer.TokenStart;
Base(ref noExecute);
ScriptLex forIter = _currentLexer.GetSubLex(forIterStart);
_currentLexer.Match((ScriptLex.LexTypes) ')');
int forBodyStart = _currentLexer.TokenStart;
if (loopCondition)
{
Statement(ref execute);
}
else
{
Statement(ref noExecute);
}
ScriptLex forBody = _currentLexer.GetSubLex(forBodyStart);
ScriptLex oldLex = _currentLexer;
if (loopCondition)
{
forIter.Reset();
_currentLexer = forIter;
Base(ref execute);
}
//TODO: limit number of iterations?
while (execute && loopCondition)
{
forCondition.Reset();
_currentLexer = forCondition;
condition = Base(ref execute);
loopCondition = condition.Var.GetBool();
if (execute && loopCondition)
{
forBody.Reset();
_currentLexer = forBody;
Statement(ref execute);
}
if (execute && loopCondition)
{
forIter.Reset();
_currentLexer = forIter;
Base(ref execute);
}
}
_currentLexer = oldLex;
}
else if (_currentLexer.TokenType == ScriptLex.LexTypes.RReturn)
{
_currentLexer.Match(ScriptLex.LexTypes.RReturn);
ScriptVarLink res = null;
if (_currentLexer.TokenType != (ScriptLex.LexTypes) ';')
{
res = Base(ref execute);
}
if (execute)
{
ScriptVarLink resultVar = _scopes.Peek().FindChild(ScriptVar.ReturnVarName);
if (resultVar != null)
{
resultVar.ReplaceWith(res);
}
else
{
//return statement outside of function???
System.Diagnostics.Trace.TraceWarning("Return statement outside of a function, what is going on?");
}
}
execute = false;
_currentLexer.Match((ScriptLex.LexTypes) ';');
}
else if (_currentLexer.TokenType == ScriptLex.LexTypes.RFunction)
{
//function
ScriptVarLink funcVar = ParseFunctionDefinition();
if (execute)
{
if (funcVar.Name == String.Empty)
{
//functions must have a name at statement level
}
else
{
ScriptVar v = _scopes.Peek();
v.AddChildNoDup(funcVar.Name, funcVar.Var);
}
}
}
else
{
_currentLexer.Match(ScriptLex.LexTypes.Eof);
}
}
private ScriptVarLink FunctionCall(ref bool execute, ScriptVarLink function, ScriptVar parent)
{
if (execute)
{
if (!function.Var.IsFunction)
{
throw new ScriptException(String.Format("{0} is not a function", function.Name));
}
_currentLexer.Match((ScriptLex.LexTypes) '(');
ScriptVar functionRoot = new ScriptVar(null, ScriptVar.Flags.Function);
if (parent != null)
{
functionRoot.AddChildNoDup("this", parent);
}
ScriptVarLink v = function.Var.FirstChild;
while (v != null)
{
ScriptVarLink value = Base(ref execute);
if (value.Var.IsBasic)
{
//pass by val
functionRoot.AddChild(v.Name, value.Var.DeepCopy());
}
else
{
//pass by ref
functionRoot.AddChild(v.Name, value.Var);
}
if (_currentLexer.TokenType != (ScriptLex.LexTypes) ')')
{
_currentLexer.Match((ScriptLex.LexTypes) ',');
}
v = v.Next;
}
_currentLexer.Match((ScriptLex.LexTypes) ')');
ScriptVarLink returnVarLink = functionRoot.AddChild(ScriptVar.ReturnVarName, null);
_scopes.Push(functionRoot);
_callStack.Push(String.Format("{0} from line {1}", function.Name, _currentLexer.LineNumber));
if (function.Var.IsNative)
{
ScriptCallbackCB func = function.Var.GetCallback();
if (func != null)
{
func(functionRoot, function.Var.GetCallbackUserData(), parent);
}
}
else
{
ScriptException ex = null;
ScriptLex oldLex = _currentLexer;
ScriptLex newLex = new ScriptLex(function.Var.GetString());
_currentLexer = newLex;
try
{
Block(ref execute);
execute = true;
}
catch (ScriptException e)
{
ex = e;
}
_currentLexer = oldLex;
if (ex != null)
{
throw ex;
}
}
_callStack.Pop();
_scopes.Pop();
ScriptVarLink returnVar = new ScriptVarLink(returnVarLink.Var, null);
functionRoot.RemoveLink(returnVarLink);
return(returnVar);
}
//not executing the function, just parsing it out
_currentLexer.Match((ScriptLex.LexTypes) '(');
while (_currentLexer.TokenType != (ScriptLex.LexTypes) ')')
{
Base(ref execute);
if (_currentLexer.TokenType != (ScriptLex.LexTypes) ')')
{
_currentLexer.Match((ScriptLex.LexTypes) ',');
}
}
_currentLexer.Match((ScriptLex.LexTypes) ')');
if (_currentLexer.TokenType == (ScriptLex.LexTypes) '{') //WTF?
{
Block(ref execute);
}
return(function);
}
private void Statement(ref bool execute)
{
if (currentLexer.TokenType == (ScriptLex.LexTypes) '{')
{
//code block
Block(ref execute);
}
else if (currentLexer.TokenType == (ScriptLex.LexTypes) ';')
{
//allow for multiple semi colon such as ;;;
currentLexer.Match((ScriptLex.LexTypes) ';');
}
else if (currentLexer.TokenType == ScriptLex.LexTypes.RVar || currentLexer.TokenType == ScriptLex.LexTypes.RConst)
{
//creating variables
//TODO: make this less shit
var readOnly = currentLexer.TokenType == ScriptLex.LexTypes.RConst;
currentLexer.Match(currentLexer.TokenType);
while (currentLexer.TokenType != (ScriptLex.LexTypes) ';')
{
ScriptVarLink a = null;
if (execute)
{
a = scopes.Back().FindChildOrCreate(currentLexer.TokenString, ScriptVar.Flags.Undefined, readOnly);
}
currentLexer.Match(ScriptLex.LexTypes.Id);
//get through the dots
while (currentLexer.TokenType == (ScriptLex.LexTypes) '.')
{
currentLexer.Match((ScriptLex.LexTypes) '.');
if (execute)
{
var aLast = a;
if (aLast != null)
{
a = aLast.Var.FindChildOrCreate(currentLexer.TokenString);
}
}
currentLexer.Match(ScriptLex.LexTypes.Id);
}
//initialiser
if (currentLexer.TokenType == (ScriptLex.LexTypes) '=')
{
currentLexer.Match((ScriptLex.LexTypes) '=');
var varLink = Base(ref execute);
if (execute)
{
if (a != null)
{
a.ReplaceWith(varLink);
}
}
}
if (currentLexer.TokenType != (ScriptLex.LexTypes) ';')
{
currentLexer.Match((ScriptLex.LexTypes) ',');
}
}
currentLexer.Match((ScriptLex.LexTypes) ';');
}
else if (currentLexer.TokenType == ScriptLex.LexTypes.RIf)
{
//if condition
currentLexer.Match(ScriptLex.LexTypes.RIf);
currentLexer.Match((ScriptLex.LexTypes) '(');
var varLink = Base(ref execute);
currentLexer.Match((ScriptLex.LexTypes) ')');
bool condition = execute && varLink.Var.Bool;
bool noExecute = false;
if (condition)
{
Statement(ref execute);
}
else
{
Statement(ref noExecute);
}
if (currentLexer.TokenType == ScriptLex.LexTypes.RElse)
{
//else part of an if
currentLexer.Match(ScriptLex.LexTypes.RElse);
if (condition)
{
Statement(ref noExecute);
}
else
{
Statement(ref execute);
}
}
}
else if (currentLexer.TokenType == ScriptLex.LexTypes.RWhile)
{
//while loop
currentLexer.Match(ScriptLex.LexTypes.RWhile);
currentLexer.Match((ScriptLex.LexTypes) '(');
var whileConditionStart = currentLexer.TokenStart;
var noExecute = false;
var condition = Base(ref execute);
var loopCondition = execute && condition.Var.Bool;
var whileCond = currentLexer.GetSubLex(whileConditionStart);
currentLexer.Match((ScriptLex.LexTypes) ')');
var whileBodyStart = currentLexer.TokenStart;
if (loopCondition)
{
Statement(ref execute);
}
else
{
Statement(ref noExecute);
}
var whileBody = currentLexer.GetSubLex(whileBodyStart);
var oldLex = currentLexer;
//TODO: possible maximum itteration limit?
while (loopCondition)
{
whileCond.Reset();
currentLexer = whileCond;
condition = Base(ref execute);
loopCondition = execute && condition.Var.Bool;
if (loopCondition)
{
whileBody.Reset();
currentLexer = whileBody;
Statement(ref execute);
}
}
currentLexer = oldLex;
}
else if (currentLexer.TokenType == ScriptLex.LexTypes.RFor)
{
//for loop
currentLexer.Match(ScriptLex.LexTypes.RFor);
currentLexer.Match((ScriptLex.LexTypes) '(');
Statement(ref execute); //init
var forConditionStart = currentLexer.TokenStart;
var condition = Base(ref execute);
var noExecute = false;
var loopCondition = execute && condition.Var.Bool;
var forCondition = currentLexer.GetSubLex(forConditionStart);
currentLexer.Match((ScriptLex.LexTypes) ';');
var forIterStart = currentLexer.TokenStart;
Base(ref noExecute);
var forIter = currentLexer.GetSubLex(forIterStart);
currentLexer.Match((ScriptLex.LexTypes) ')');
var forBodyStart = currentLexer.TokenStart;
if (loopCondition)
{
Statement(ref execute);
}
else
{
Statement(ref noExecute);
}
var forBody = currentLexer.GetSubLex(forBodyStart);
var oldLex = currentLexer;
if (loopCondition)
{
forIter.Reset();
currentLexer = forIter;
Base(ref execute);
}
//TODO: limit number of iterations?
while (execute && loopCondition)
{
forCondition.Reset();
currentLexer = forCondition;
condition = Base(ref execute);
loopCondition = condition.Var.Bool;
if (execute && loopCondition)
{
forBody.Reset();
currentLexer = forBody;
Statement(ref execute);
}
if (execute && loopCondition)
{
forIter.Reset();
currentLexer = forIter;
Base(ref execute);
}
}
currentLexer = oldLex;
}
else if (currentLexer.TokenType == ScriptLex.LexTypes.RReturn)
{
currentLexer.Match(ScriptLex.LexTypes.RReturn);
ScriptVarLink res = null;
if (currentLexer.TokenType != (ScriptLex.LexTypes) ';')
{
res = Base(ref execute);
}
if (execute)
{
var resultVar = scopes.Back().FindChild(ScriptVar.ReturnVarName);
if (resultVar != null)
{
resultVar.ReplaceWith(res);
}
else
{
//return statement outside of function???
System.Diagnostics.Trace.TraceWarning("Return statement outside of a function, what is going on?");
}
execute = false;
}
currentLexer.Match((ScriptLex.LexTypes) ';');
}
else if (currentLexer.TokenType == ScriptLex.LexTypes.RFunction)
{
//function
var funcVar = ParseFunctionDefinition();
if (execute)
{
if (funcVar.Name == string.Empty)
{
//functions must have a name at statement level
}
else
{
var v = scopes.Back();
v.AddChildNoDup(funcVar.Name, funcVar.Var);
}
}
}
else if (currentLexer.TokenType == ScriptLex.LexTypes.RTry)
{
var tryBlock = ParseDefinition(ScriptLex.LexTypes.RTry);
ScriptVarLink catchBlock = null, finallyBlock = null;
var originalLexer = currentLexer;
if (currentLexer.TokenType == ScriptLex.LexTypes.RCatch)
{
catchBlock = ParseDefinition(ScriptLex.LexTypes.RCatch);
}
if (currentLexer.TokenType == ScriptLex.LexTypes.RFinally)
{
finallyBlock = ParseDefinition(ScriptLex.LexTypes.RFinally);
}
try
{
var oldLex = currentLexer;
var newLex = new ScriptLex(tryBlock.Var.String);
currentLexer = newLex;
Block(ref execute);
execute = true;
currentLexer = oldLex;
}
catch (JITException ex)
{
if (catchBlock != null)
{
var catchScope = new ScriptVar(null, ScriptVar.Flags.Object);
var v = catchBlock?.Var?.FirstChild;
if (v != null)
{
catchScope.AddChild(v.Name, ex.VarObj);
}
var oldLex = currentLexer;
var newLex = new ScriptLex(catchBlock.Var.String);
currentLexer = newLex;
scopes.PushBack(catchScope);
Block(ref execute);
scopes.PopBack();
execute = true;
currentLexer = oldLex;
}
else
{
throw new ScriptException(ex.Message, ex);
}
}
finally
{
if (finallyBlock != null)
{
var oldLex = currentLexer;
var newLex = new ScriptLex(finallyBlock.Var.String);
currentLexer = newLex;
Block(ref execute);
execute = true;
currentLexer = oldLex;
}
}
currentLexer = originalLexer;
}
else if (currentLexer.TokenType == ScriptLex.LexTypes.RThrow)
{
currentLexer.Match(ScriptLex.LexTypes.RThrow);
ScriptVar message = new ScriptVar();
if (currentLexer.TokenType == (ScriptLex.LexTypes) ';')
{
currentLexer.Match((ScriptLex.LexTypes) ';');
}
else
{
var res = Base(ref execute);
message = res.Var;
}
throw new JITException(message);
}
else
{
//execute a basic statement
Base(ref execute);
currentLexer.Match((ScriptLex.LexTypes) ';');
}
}