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yhirose 2020-03-29 17:03:47 -04:00
parent fdfd1f4267
commit 95f9140464
1 changed files with 133 additions and 156 deletions
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93
lint/peglint.cc
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@ -5,18 +5,15 @@
// MIT License
//
#include <peglib.h>
#include <fstream>
#include <peglib.h>
#include <sstream>
using namespace std;
inline bool read_file(const char* path, vector<char>& buff)
{
inline bool read_file(const char *path, vector<char> &buff) {
ifstream ifs(path, ios::in | ios::binary);
if (ifs.fail()) {
return false;
}
if (ifs.fail()) { return false; }
buff.resize(static_cast<unsigned int>(ifs.seekg(0, ios::end).tellg()));
if (!buff.empty()) {
@ -25,15 +22,14 @@ inline bool read_file(const char* path, vector<char>& buff)
return true;
}
int main(int argc, const char** argv)
{
int main(int argc, const char **argv) {
auto opt_ast = false;
auto opt_optimize_ast_nodes = false;
auto opt_help = false;
auto opt_source = false;
vector<char> source;
auto opt_trace = false;
vector<const char*> path_list;
vector<const char *> path_list;
auto argi = 1;
while (argi < argc) {
@ -42,7 +38,8 @@ int main(int argc, const char** argv)
opt_help = true;
} else if (string("--ast") == arg) {
opt_ast = true;
} else if (string("--optimize_ast_nodes") == arg || string("--opt") == arg) {
} else if (string("--optimize_ast_nodes") == arg ||
string("--opt") == arg) {
opt_optimize_ast_nodes = true;
} else if (string("--source") == arg) {
opt_source = true;
@ -58,7 +55,9 @@ int main(int argc, const char** argv)
}
if (path_list.empty() || opt_help) {
cerr << "usage: peglint [--ast] [--optimize_ast_nodes|--opt] [--source text] [--trace] [grammar file path] [source file path]" << endl;
cerr << "usage: peglint [--ast] [--optimize_ast_nodes|--opt] [--source "
"text] [--trace] [grammar file path] [source file path]"
<< endl;
return 1;
}
@ -73,17 +72,13 @@ int main(int argc, const char** argv)
peg::parser parser;
parser.log = [&](size_t ln, size_t col, const string& msg) {
parser.log = [&](size_t ln, size_t col, const string &msg) {
cerr << syntax_path << ":" << ln << ":" << col << ": " << msg << endl;
};
if (!parser.load_grammar(syntax.data(), syntax.size())) {
return -1;
}
if (!parser.load_grammar(syntax.data(), syntax.size())) { return -1; }
if (path_list.size() < 2 && !opt_source) {
return 0;
}
if (path_list.size() < 2 && !opt_source) { return 0; }
// Check source
std::string source_path = "[commandline]";
@ -95,45 +90,37 @@ int main(int argc, const char** argv)
source_path = path_list[1];
}
parser.log = [&](size_t ln, size_t col, const string& msg) {
parser.log = [&](size_t ln, size_t col, const string &msg) {
cerr << source_path << ":" << ln << ":" << col << ": " << msg << endl;
};
if (opt_trace) {
size_t prev_pos = 0;
parser.enable_trace(
[&](const char* name,
const char* s,
size_t /*n*/,
const peg::SemanticValues& /*sv*/,
const peg::Context& c,
const peg::any& /*dt*/) {
[&](const char *name, const char *s, size_t /*n*/,
const peg::SemanticValues & /*sv*/, const peg::Context &c,
const peg::any & /*dt*/) {
auto pos = static_cast<size_t>(s - c.s);
auto backtrack = (pos < prev_pos ? "*" : "");
string indent;
auto level = c.trace_ids.size() - 1;
while (level--) { indent += "│"; }
std::cout
<< "E " << pos << backtrack << "\t"
<< indent << "┌" << name
<< " #" << c.trace_ids.back()
<< std::endl;
while (level--) {
indent += "│";
}
std::cout << "E " << pos << backtrack << "\t" << indent << "┌" << name
<< " #" << c.trace_ids.back() << std::endl;
prev_pos = static_cast<size_t>(pos);
},
[&](const char* name,
const char* s,
size_t /*n*/,
const peg::SemanticValues& sv,
const peg::Context& c,
const peg::any& /*dt*/,
size_t len) {
[&](const char *name, const char *s, size_t /*n*/,
const peg::SemanticValues &sv, const peg::Context &c,
const peg::any & /*dt*/, size_t len) {
auto pos = static_cast<size_t>(s - c.s);
if (len != static_cast<size_t>(-1)) {
pos += len;
}
if (len != static_cast<size_t>(-1)) { pos += len; }
string indent;
auto level = c.trace_ids.size() - 1;
while (level--) { indent += "│"; }
while (level--) {
indent += "│";
}
auto ret = len != static_cast<size_t>(-1) ? "└o " : "└x ";
std::stringstream choice;
if (sv.choice_count() > 0) {
@ -141,35 +128,25 @@ int main(int argc, const char** argv)
}
std::string token;
if (!sv.tokens.empty()) {
const auto& tok = sv.tokens[0];
const auto &tok = sv.tokens[0];
token += " '" + std::string(tok.first, tok.second) + "'";
}
std::cout
<< "L " << pos << "\t"
<< indent << ret << name
<< " #" << c.trace_ids.back()
<< choice.str()
<< token
<< std::endl;
}
);
std::cout << "L " << pos << "\t" << indent << ret << name << " #"
<< c.trace_ids.back() << choice.str() << token << std::endl;
});
}
if (opt_ast) {
parser.enable_ast();
std::shared_ptr<peg::Ast> ast;
if (!parser.parse_n(source.data(), source.size(), ast)) {
return -1;
}
if (!parser.parse_n(source.data(), source.size(), ast)) { return -1; }
ast = peg::AstOptimizer(opt_optimize_ast_nodes).optimize(ast);
std::cout << peg::ast_to_s(ast);
} else {
if (!parser.parse_n(source.data(), source.size())) {
return -1;
}
if (!parser.parse_n(source.data(), source.size())) { return -1; }
}
return 0;