/// <summary>
/// Exit a parse tree produced by <see cref="DDD_layout_scriptParser.assign_statement"/>.
/// <para>The default implementation does nothing.</para>
/// </summary>
/// <param name="context">The parse tree.</param>
public virtual void ExitAssign_statement([NotNull] DDD_layout_scriptParser.Assign_statementContext context)
{
}
/* 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);
}
/// <summary>
/// Visit a parse tree produced by <see cref="DDD_layout_scriptParser.assign_statement"/>.
/// <para>
/// The default implementation returns the result of calling <see cref="AbstractParseTreeVisitor{Result}.VisitChildren(IRuleNode)"/>
/// on <paramref name="context"/>.
/// </para>
/// </summary>
/// <param name="context">The parse tree.</param>
/// <return>The visitor result.</return>
public virtual Result VisitAssign_statement([NotNull] DDD_layout_scriptParser.Assign_statementContext context)
{
return(VisitChildren(context));
}
