luau/tests/AstQueryDsl.cpp

46 lines
908 B
C++
Raw Permalink Normal View History

// This file is part of the Luau programming language and is licensed under MIT License; see LICENSE.txt for details
#include "AstQueryDsl.h"
namespace Luau
{
FindNthOccurenceOf::FindNthOccurenceOf(Nth nth)
: requestedNth(nth)
{
}
bool FindNthOccurenceOf::checkIt(AstNode* n)
{
if (theNode)
return false;
if (n->classIndex == requestedNth.classIndex)
{
// Human factor: the requestedNth starts from 1 because of the term `nth`.
if (currentOccurrence + 1 != requestedNth.nth)
++currentOccurrence;
else
theNode = n;
}
return !theNode; // once found, returns false and stops traversal
}
bool FindNthOccurenceOf::visit(AstNode* n)
{
return checkIt(n);
}
bool FindNthOccurenceOf::visit(AstType* t)
{
return checkIt(t);
}
bool FindNthOccurenceOf::visit(AstTypePack* t)
{
return checkIt(t);
}
} // namespace Luau