WsParser_VS/libSyntax/ast_gen.cpp

43 lines
1.3 KiB
C++

#include "ast_gen.h"
using namespace ast_gen;
using namespace ast_basic;
using namespace lib_token;
using namespace lib_syntax;
using namespace lib_words;
SyntaxParser::SyntaxParser(std::shared_ptr<const IBasicRule> rule)
: _rule_bind(rule) { }
QList<std::shared_ptr<const MatchCursor>> SyntaxParser::parse(std::shared_ptr<const IPrimitiveWord> words) {
auto cursor = std::make_shared<MatchCursor>(words->file());
cursor->setCurrent(nullptr, words);
auto list = this->_rule_bind->parse(cursor);
std::sort(list.begin(), list.end(),
[&](std::shared_ptr<const MatchCursor> a, std::shared_ptr<const MatchCursor> b) {
return a->currentToken()->position() > b->currentToken()->position();
});
return list;
}
#include "tokens_impl.h"
std::shared_ptr<IExprInstance> ast_gen::SyntaxParser::getAst(
std::shared_ptr<const lib_syntax::MatchCursor> cursor, std::shared_ptr<IExprInstance> root) {
QList<std::shared_ptr<const IActionToken>> token_seqs;
std::shared_ptr<const IActionToken> action_token = cursor->currentToken();
while (action_token) {
token_seqs.prepend(action_token);
action_token = action_token->prevToken();
}
auto expr_inst = root;
for (auto ins_t : token_seqs) {
expr_inst = std::const_pointer_cast<IActionToken>(ins_t)->makeSure(expr_inst);
}
return expr_inst;
}