private static void AddSledSpecificFunctions(LuatTable table)
{
if (table == null)
return;
// add libsleddebugger table
{
var debuggerTable = new LuatTable { Description = "libsleddebugger injected functionality" };
debuggerTable.AddChild("version", new LuatLiteral(LuatTypeString.Instance));
debuggerTable.AddChild("instance", new LuatLiteral(LuatTypeNumber.Instance));
table.AddChild("libsleddebugger", debuggerTable);
}
// add libsledluaplugin table
{
var luaPluginTable = new LuatTable { Description = "libsledluaplugin injected functionality" };
luaPluginTable.AddChild("version", new LuatLiteral(LuatTypeString.Instance));
luaPluginTable.AddChild("instance", new LuatLiteral(LuatTypeNumber.Instance));
{
var retVal = new LuatVariable(null, LuatTypeNil.Instance, LuatVariableFlags.None);
var function = new LuatFunction(retVal, new[] { "message" }) { ExpectsSelf = false };
luaPluginTable.AddChild("tty", function);
}
{
var retVal = new LuatVariable(null, LuatTypeNil.Instance, LuatVariableFlags.None);
var function = new LuatFunction(retVal, new[] { "condition", "message" }) { ExpectsSelf = false };
luaPluginTable.AddChild("assert", function);
}
{
var retVal = new LuatVariable(null, LuatTypeNil.Instance, LuatVariableFlags.None);
var function = new LuatFunction(retVal, new[] { "error" }) { ExpectsSelf = false };
luaPluginTable.AddChild("errorhandler", function);
}
table.AddChild("libsledluaplugin", luaPluginTable);
}
}
/// <summary>
/// Adds a variable to the unresolved type list
/// </summary>
/// <param name="variable"></param>
/// <returns></returns>
public bool AddUnresolvedVariableType(LuatVariable variable)
{
if (m_unresolvedVariableTypes.Contains(variable))
{
return(false);
}
if (!variable.IsFixedType)
{
variable.Type = LuatTypeUnknown.Instance;
}
m_unresolvedVariableTypes.Add(variable);
foreach (LuatValue.IReference reference in variable.References)
{
reference.OnTypeInvalidated();
}
return(true);
}
/// <summary>
/// Attempts to resolve (or infer) the variable type
/// </summary>
/// <param name="variable"></param>
/// <returns>true if the type was resolved or false if the type could not be resolved</returns>
private bool ResolveVariableType(LuatVariable variable)
{
LuatType type = variable.Type;
foreach (LuatValue.IReference assignment in variable.Assignments)
{
if (null == assignment.Value)
{
return false;
}
LuatType rhsType = assignment.Value.Type;
if (rhsType is LuatTypeUnknown)
{
// Being assigned an unknown results in an unknown
return false;
}
if (type is LuatTypeUnknown || type is LuatTypeNil)
{
type = rhsType;
continue;
}
if (rhsType is LuatTypeNil)
{
continue;
}
if (type.Equals(rhsType))
{
continue;
}
if (variable.IsFixedType)
{
assignment.AddWarning(WarningType.FixedType, string.Format("Type is fixed to {0}", type));
continue;
}
// Mixed types.
var mixed = type as LuatTypeMixed;
if (null == mixed)
{
mixed = new LuatTypeMixed();
mixed.AddType(type);
type = mixed;
}
mixed.AddType(rhsType);
}
if (null == type)
{
return false;
}
variable.Type = type;
// Propagate resolving of variable types through expressions
foreach (LuatValue.IReference reference in variable.References)
{
reference.OnTypeInvalidated();
}
return true;
}
/// <summary>
/// Adds a variable to the unresolved type list
/// </summary>
/// <param name="variable"></param>
/// <returns></returns>
public bool AddUnresolvedVariableType(LuatVariable variable)
{
if (m_unresolvedVariableTypes.Contains(variable))
return false;
if (!variable.IsFixedType)
variable.Type = LuatTypeUnknown.Instance;
m_unresolvedVariableTypes.Add(variable);
foreach (LuatValue.IReference reference in variable.References)
{
reference.OnTypeInvalidated();
}
return true;
}
/// <summary>
/// Attempts to resolve (or infer) the variable type
/// </summary>
/// <param name="variable"></param>
/// <returns>true if the type was resolved or false if the type could not be resolved</returns>
private bool ResolveVariableType(LuatVariable variable)
{
LuatType type = variable.Type;
foreach (LuatValue.IReference assignment in variable.Assignments)
{
if (null == assignment.Value)
{
return(false);
}
LuatType rhsType = assignment.Value.Type;
if (rhsType is LuatTypeUnknown)
{
// Being assigned an unknown results in an unknown
return(false);
}
if (type is LuatTypeUnknown || type is LuatTypeNil)
{
type = rhsType;
continue;
}
if (rhsType is LuatTypeNil)
{
continue;
}
if (type.Equals(rhsType))
{
continue;
}
if (variable.IsFixedType)
{
assignment.AddWarning(WarningType.FixedType, string.Format("Type is fixed to {0}", type));
continue;
}
// Mixed types.
var mixed = type as LuatTypeMixed;
if (null == mixed)
{
mixed = new LuatTypeMixed();
mixed.AddType(type);
type = mixed;
}
mixed.AddType(rhsType);
}
if (null == type)
{
return(false);
}
variable.Type = type;
// Propagate resolving of variable types through expressions
foreach (LuatValue.IReference reference in variable.References)
{
reference.OnTypeInvalidated();
}
return(true);
}