// minden scope-ban nézünk egyezést. Az első-be ismétlődés találásánál errort dobunk.
// a többiben figyelmeztetjük a programozót, hogy name shadow-ol
public bool Add(Symbol symbol, dynamic value, Stack <Scope> scopeStack)
{
foreach (KeyValuePair <Symbol, dynamic> pair in table)
{
if (pair.Key.Name == symbol.Name)
{
ErrorMsg = $"Redefinition of variable '{symbol.Name}'";
return(false);
}
}
if (scopeStack.Count != 0)
{
scopeStack.Pop(); // a mostani scope-ot kivesszök
foreach (var scope in scopeStack)
{
foreach (KeyValuePair <Symbol, dynamic> pair in scope.table)
{
if (pair.Key.Name == symbol.Name && pair.Key.IsIterator == false)
{
WarningMsg = $"Name shadowing. There is already a variable defined as '{symbol.Name}'";
break;
}
else if (pair.Key.Name == symbol.Name && pair.Key.IsIterator == true)
{
ErrorMsg = $"Name shadowing. You cannot declare a variable with the name of an iterator ({symbol.Name})";
return(false);
}
}
}
}
if (!Assigner.CanAssign(symbol.Type, value))
{
ErrorMsg = Assigner.ErrorMsg;
return(false);
}
table[symbol] = value;
return(true);
}
// úgy adja hozzá, hogy csak az adott scope-ban néz egyezést
// így hozzuk létre az iterátorokat
public bool Add(Symbol symbol, dynamic value)
{
foreach (KeyValuePair <Symbol, dynamic> pair in table)
{
if (pair.Key.Name == symbol.Name)
{
ErrorMsg = $"Redefinition of variable '{symbol.Name}'";
return(false);
}
}
if (!Assigner.CanAssign(symbol.Type, value))
{
ErrorMsg = Assigner.ErrorMsg;
return(false);
}
table[symbol] = value;
return(true);
}
private bool SetVariableValueByName(string id, dynamic value, OtherBinaryOperation obo, ParserRuleContext context)
{
if (value == null)
{
return(false);
}
dynamic currentValue = GetVariableValueByName(id);
string currentType = GetVariableTypeByName(id);
bool complexAssign = obo != null;
if (complexAssign)
{
var newValue = obo.Calculate(currentValue, value);
string warningMsg = obo.WarningMsg;
if (warningMsg != null)
{
alerts.Add(new warning(context.Start.Line, warningMsg));
}
if (newValue == null)
{
alerts.Add(new error(context.Start.Line, obo.ErrorMsg));
return(false);
}
bool success = currentScope.ReplaceKey(id, newValue);
if (!success)
{
foreach (Scope sc in symbolTable)
{
success = sc.ReplaceKey(id, newValue);
if (success)
{
break;
}
}
}
}
else
{
if (Assigner.CanAssign(currentType, value))
{
bool success = currentScope.ReplaceKey(id, value);
if (!success)
{
foreach (Scope sc in symbolTable)
{
success = sc.ReplaceKey(id, value);
if (success)
{
break;
}
}
}
}
else
{
alerts.Add(new error(context.Start.Line, Assigner.ErrorMsg));
return(false);
}
}
return(true);
}
/* assign_statement: (simple_modifyable_exp EQ operation SEMI) |
* (simple_modifyable_exp other_binary_op operation SEMI);
*
*/
public override object VisitAssign_statement([NotNull] DDD_layout_scriptParser.Assign_statementContext context)
{
var toModify = context.simple_modifyable_exp();
if (toModify.ID() != null)
{
string id = toModify.ID().GetText();
Symbol symbol = GetVariableByName(id);
dynamic value = GetVariableValueByName(id);
if (value == null)
{
alerts.Add(new error(context.Start.Line, $"Cannot assign to an undefined variable {id}"));
return(null);
}
if (symbol.Const && !(value is UnitializedObject))
{
alerts.Add(new error(context.Start.Line, $"Left hand side refers to a constant expression {id}"));
return(null);
}
dynamic opValue = VisitOperation(context.operation());
if (opValue is UnitializedObject)
{
alerts.Add(new error(context.Start.Line, $"You cannot assign uninitialized varible to another one"));
return(null);
}
// az értéket teljesen felülírjuk
if (context.EQ() != null)
{
SetVariableValueByName(id, opValue, context);
}
// az értéket változtatjuk ( += v -= v *= v /= )
else
{
if (value is UnitializedObject)
{
alerts.Add(new error(context.Start.Line, $"You cannot use += -= *= /= on an uninitalized variable ({id})"));
return(null);
}
SetVariableValueByName(id, opValue, new OtherBinaryOperation(context.other_binary_op().GetText()), context);
}
}
// vektor valamelyik koordinátájával csinálunk valamit.
else
{
var xyz = toModify.modifiable_xyz();
string xyzText = xyz.GetText();
string id = xyz.ID().GetText();
Symbol symbol = GetVariableByName(id);
dynamic value = GetVariableValueByName(id);
if (value == null)
{
alerts.Add(new error(context.Start.Line, $"Cannot assign to an undefined variable {id}"));
return(null);
}
if (symbol.Const && !(value is UnitializedObject))
{
alerts.Add(new error(context.Start.Line, $"Left hand side refers to a constant expression {id}"));
return(null);
}
if (symbol.Type != "Vec3" && symbol.Type != "Unknown")
{
alerts.Add(new error(context.Start.Line, "Cannot access coordinates of a non Vec3 type"));
return(null);
}
else if (value is UnitializedObject)
{
alerts.Add(new error(context.Start.Line, "Accessing coordinates of an unitialized Vec3"));
return(null);
}
vec3 originalVec3 = (vec3)value;
dynamic opValue = VisitOperation(context.operation());
if (!Assigner.CanAssign("Float", opValue))
{
alerts.Add(new error(context.Start.Line, Assigner.ErrorMsg));
return(null);
}
if (xyzText.Contains(".x"))
{
if (context.EQ() != null)
{
dynamic res = opValue;
originalVec3.x = res;
SetVariableValueByName(id, originalVec3, null);
}
else
{
OtherBinaryOperation obo = new OtherBinaryOperation(context.other_binary_op().GetText());
dynamic res = obo.Calculate(originalVec3.x, opValue);
originalVec3.x = res;
SetVariableValueByName(id, originalVec3, null);
}
}
else if (xyzText.Contains(".y"))
{
if (context.EQ() != null)
{
dynamic res = opValue;
originalVec3.y = res;
SetVariableValueByName(id, originalVec3, null);
}
else
{
OtherBinaryOperation obo = new OtherBinaryOperation(context.other_binary_op().GetText());
dynamic res = obo.Calculate(originalVec3.y, opValue);
originalVec3.y = res;
SetVariableValueByName(id, originalVec3, null);
}
}
else if (xyzText.Contains(".z"))
{
if (context.EQ() != null)
{
dynamic res = opValue;
originalVec3.z = res;
SetVariableValueByName(id, originalVec3, null);
}
else
{
OtherBinaryOperation obo = new OtherBinaryOperation(context.other_binary_op().GetText());
dynamic res = obo.Calculate(originalVec3.z, opValue);
originalVec3.z = res;
SetVariableValueByName(id, originalVec3, null);
}
}
}
return(null);
}