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LR0: Implemented ::expand

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This commit is contained in:
Paul Beckingham 2016-01-02 15:35:53 -05:00
parent ecb161131c
commit f4bff57b09
1 changed files with 4 additions and 0 deletions
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4
src/LR0.cpp
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@ -130,9 +130,13 @@ std::set <std::string> LR0::getExpected (const Closure& closure) const
}
////////////////////////////////////////////////////////////////////////////////
// Add all items to the result set matching the production rule for symbol.
LR0::Closure LR0::expand (const std::string& symbol) const
{
LR0::Closure result;
for (auto& rule : _augmented)
if (rule[0] == symbol)
result.push_back (Item (rule));
return result;
}