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LR0: Added ::getExpectations

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This commit is contained in:
Paul Beckingham 2016-01-02 14:16:11 -05:00
parent 9327ff7c8b
commit 679f094f16
1 changed files with 5 additions and 0 deletions
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5
src/LR0.cpp
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@ -105,9 +105,14 @@ LR0::Closure LR0::getClosure (const Closure& items)
}
////////////////////////////////////////////////////////////////////////////////
// Collect a unique set of expected symbols from the closure.
std::vector <std::string> LR0::getExpectations (const Closure& closure)
{
std::vector <std::string> expected;
for (auto& item : closure)
if (! item.done () &&
std::find (expected.begin (), expected.end (), item.next ()) == expected.end ())
expected.push_back (item.next ());
return expected;
}