tree-sitter/spec/helpers/rule_helpers.cc
2016-12-02 16:24:19 -08:00

55 lines
1.4 KiB
C++

#include "rule_helpers.h"
#include <memory>
#include "compiler/rules/symbol.h"
namespace tree_sitter {
using std::make_shared;
using std::set;
using std::map;
using std::ostream;
using std::string;
using std::to_string;
using rules::Symbol;
rule_ptr character(const set<uint32_t> &ranges) {
return character(ranges, true);
}
rule_ptr character(const set<uint32_t> &chars, bool sign) {
rules::CharacterSet result;
if (sign) {
for (uint32_t c : chars)
result.include(c);
} else {
result.include_all();
for (uint32_t c : chars)
result.exclude(c);
}
return result.copy();
}
rule_ptr i_sym(size_t index) {
return make_shared<Symbol>(index, Symbol::NonTerminal);
}
rule_ptr i_token(size_t index) {
return make_shared<Symbol>(index, Symbol::Terminal);
}
rule_ptr metadata(rule_ptr rule, rules::MetadataParams params) {
return rules::Metadata::build(rule, params);
}
rule_ptr active_prec(int precedence, rule_ptr rule) {
rules::MetadataParams params;
params.precedence = precedence;
params.has_precedence = true;
params.is_active = true;
return rules::Metadata::build(rule, params);
}
bool operator==(const Variable &left, const Variable &right) {
return left.name == right.name && left.rule->operator==(*right.rule) &&
left.type == right.type;
}
}