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Add stream operator for ParseItemSet

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This commit is contained in:
Max Brunsfeld 2017-07-12 09:42:56 -07:00
parent 65bf1389e1
commit 5c8f7c035e
1 changed files with 29 additions and 0 deletions
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29
test/helpers/stream_methods.cc
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@ -180,6 +180,35 @@ ostream &operator<<(ostream &stream, const LexItemSet &item_set) {
return stream << item_set.entries;
}
ostream &operator<<(ostream &stream, const ParseItem &item) {
stream << "(ParseItem " << item.lhs() << " ->";
for (size_t i = 0; i < item.production->size(); i++) {
if (i == item.step_index) {
stream << " •";
}
stream << " " << item.production->at(i).symbol << " " << item.production->at(i).precedence <<
" " << (int)item.production->at(i).associativity;
}
if (item.step_index == item.production->size()) {
stream << " • ";
}
return stream << ")";
}
ostream &operator<<(ostream &stream, const ParseItemSet &item_set) {
return stream << item_set.entries;
}
ostream &operator<<(ostream &stream, const LookaheadSet &lookaheads) {
if (lookaheads.entries.get()) {
return stream << *lookaheads.entries;
} else {
return stream << "()";
}
}
ostream &operator<<(ostream &stream, const LexItemSet::Transition &transition) {
return stream << "(Transition " << transition.destination << " prec:" << transition.precedence << ")";
}