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sm_parsers: instr parser

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ProgramSnail 2025-05-24 15:00:06 +03:00
parent 9563485f8f
commit c348af161c
1 changed files with 20 additions and 46 deletions
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66
byterun/src/sm_parser.cpp
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@ -201,7 +201,7 @@ ParsingResult parse_var(std::string_view s) {
}
// (_, _)
ParsingResult parse_pair(std::string_view s) { // TODO
ParsingResult parse_pair(std::string_view s) {
if (s.size() < 2 || s.front() != '(') {
return {};
}
@ -215,13 +215,13 @@ ParsingResult parse_pair(std::string_view s) { // TODO
}
// [_, ..., _]
ParsingResult parse_array(std::string_view s) { // TODO
if (s.size() < 2 || s.front() != '[') {
ParsingResult parse_array(std::string_view s, char first_symbol = '[') {
if (s.size() < 2 || s.front() != first_symbol) {
return {};
}
std::vector<std::any> values;
ParsingResult res{{}, s.substr(1)}; // skip '['
ParsingResult res{{}, s.substr(1)}; // skip '[' (first_symbol)
while (not s.empty()) {
res = parse_any_val(res.rest);
@ -521,51 +521,25 @@ std::optional<SMInstr> parse_sm(const std::string &line) {
return instr.build();
}
// NOTE: do not check for valid input
// if (auto space = std::string{substr_to(line, pos, '(')}; space != " ") {
// return std::nullopt;
// }
// (_, ..., _) - args
ParsingResult args_res = parse_array({line.data(), line.data() + pos});
// TODO: Automatically parse any structures with parser combinators
// if (cmd == "BEGIN") {
// // TODO: BEGIN
// } else {
try {
auto args = std::any_cast<std::vector<std::any>>(std::move(args_res.value));
args_res.value = {};
// bool was_last_arg = false;
// while (!was_last_arg) {
// std::string arg = substr_to(line, pos, '(');
// ++pos;
if (not args_res.rest.empty()) {
return std::nullopt;
}
// if (arg.empty()) {
// arg = line.substr(pos);
// arg.pop_back(); // ')'
// was_last_arg = true;
// }
// if (arg.front() == '"') {
// instr.push_arg(arg.substr(1, arg.size() - 2));
// } else if (arg.front() == '[') {
// // TODO: parse array
// instr.push_arg(arg.substr(1, arg.size() - 2));
// } else if (arg == "true") {
// instr.push_arg(true);
// } else if (arg == "false") {
// instr.push_arg(false);
// } else if (auto maybe_var = parse_var(arg); maybe_var) {
// instr.push_arg(*maybe_var);
// } else if () { // TODO: CLUSURE vector
// } else if (auto maybe_patt = parse_patt(arg); maybe_patt) {
// instr.push_arg(*maybe_patt);
// } else if (int n = 0; std::from_chars(line.data() + pos,
// line.data() + pos +
// line.size(), n)
// .ec == std::errc{}) {
// instr.push_arg(n);
// } else {
// return std::nullopt;
// }
// }
// }
// TODO: put all array at once
for (auto &&arg : args) {
instr.push_arg(arg);
}
args = {};
} catch (const std::bad_any_cast &) {
return std::nullopt;
}
return instr.build();
}