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Fix stream operator on rules and items

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This commit is contained in:
Max Brunsfeld 2013-11-12 08:17:19 -08:00
parent 11e3980319
commit 6bbaba3ef8
4 changed files with 49 additions and 13 deletions
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32
src/lr/item.cpp
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@ -1,8 +1,10 @@
#include "item.h"
using namespace std;
namespace tree_sitter {
namespace lr {
Item::Item(const std::string &rule_name, rules::rule_ptr rule, int consumed_sym_count) :
Item::Item(const std::string &rule_name, const rules::rule_ptr rule, int consumed_sym_count) :
rule_name(rule_name),
rule(rule),
consumed_sym_count(consumed_sym_count) {};
@ -12,5 +14,31 @@ namespace tree_sitter {
return item_ptr(new Item(rule_name, to_rule, consumed_sym_count + 1));
});
};
vector<rules::rule_ptr> Item::next_symbols() const {
vector<rules::rule_ptr> result;
for (auto pair : rule->transitions())
result.push_back(pair.second);
return result;
}
bool Item::operator==(const Item &other) const {
return (
other.rule_name == rule_name &&
other.rule == rule &&
other.consumed_sym_count == consumed_sym_count);
}
std::ostream& operator<<(ostream &stream, const Item &item) {
stream <<
string("(item '") <<
item.rule_name <<
string("' ") <<
*item.rule <<
string(")");
return stream;
}
}
}
}