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#pragma once
#include <lexy/_detail/config.hpp>
#include <lexy/dsl.hpp>
#include "openvic-dataloader/v2script/AbstractSyntaxTree.hpp"
#include "SimpleGrammar.hpp"
#include "detail/dsl.hpp"
namespace ovdl::v2script::lua::grammar {
template<typename ReturnType, typename... Callback>
constexpr auto callback(Callback... cb) {
return dsl::callback<ReturnType>(cb...);
}
template<typename T>
constexpr auto construct = v2script::grammar::construct<T>;
template<typename T>
constexpr auto construct_list = v2script::grammar::construct_list<T>;
struct ParseOptions {
};
template<ParseOptions Options>
struct StatementListBlock;
static constexpr auto comment_specifier = LEXY_LIT("--") >> lexy::dsl::until(lexy::dsl::newline).or_eof();
template<ParseOptions Options>
struct Identifier {
static constexpr auto rule = lexy::dsl::identifier(lexy::dsl::ascii::alpha_underscore, lexy::dsl::ascii::alpha_digit_underscore);
static constexpr auto value = callback<ast::IdentifierValue*>(
[](ast::ParseState& state, auto lexeme) {
auto value = state.ast().intern(lexeme.data(), lexeme.size());
return state.ast().create<ast::IdentifierValue>(lexeme.begin(), lexeme.end(), value);
});
};
template<ParseOptions Options>
struct Value {
static constexpr auto rule = lexy::dsl::identifier(lexy::dsl::ascii::digit / lexy::dsl::lit_c<'.'> / lexy::dsl::lit_c<'-'>);
static constexpr auto value = callback<ast::IdentifierValue*>(
[](ast::ParseState& state, auto lexeme) {
auto value = state.ast().intern(lexeme.data(), lexeme.size());
return state.ast().create<ast::IdentifierValue>(lexeme.begin(), lexeme.end(), value);
});
};
template<ParseOptions Options>
struct String {
static constexpr auto rule = [] {
// Arbitrary code points that aren't control characters.
auto c = dsl::make_range<0x20, 0xFF>() - lexy::dsl::ascii::control;
return lexy::dsl::delimited(lexy::dsl::position(lexy::dsl::lit_b<'"'>))(c) | lexy::dsl::delimited(lexy::dsl::position(lexy::dsl::lit_b<'\''>))(c);
}();
static constexpr auto value =
lexy::as_string<std::string> >>
callback<ast::StringValue*>(
[](ast::ParseState& state, const char* begin, const std::string& str, const char* end) {
auto value = state.ast().intern(str.data(), str.length());
return state.ast().create<ast::StringValue>(begin, end, value);
});
};
template<ParseOptions Options>
struct Expression {
static constexpr auto rule = lexy::dsl::p<Value<Options>> | lexy::dsl::p<String<Options>>;
static constexpr auto value = lexy::forward<ast::Value*>;
};
template<ParseOptions Options>
struct AssignmentStatement {
static constexpr auto rule =
dsl::p<Identifier<Options>> >>
lexy::dsl::equal_sign >>
(lexy::dsl::p<Expression<Options>> | lexy::dsl::recurse_branch<StatementListBlock<Options>>);
static constexpr auto value = callback<ast::AssignStatement*>(
[](ast::ParseState& state, const char* pos, ast::IdentifierValue* name, ast::Value* initializer) {
return state.ast().create<ast::AssignStatement>(pos, name, initializer);
});
};
template<ParseOptions Options>
struct StatementListBlock {
static constexpr auto rule =
dsl::curly_bracketed(
lexy::dsl::opt(
lexy::dsl::list(
lexy::dsl::recurse_branch<AssignmentStatement<Options>>,
lexy::dsl::trailing_sep(lexy::dsl::lit_c<','>))));
static constexpr auto value =
lexy::as_list<ast::AssignStatementList> >> construct_list<ast::ListValue>;
};
template<ParseOptions Options = ParseOptions {}>
struct File {
// Allow arbitrary spaces between individual tokens.
static constexpr auto whitespace = ovdl::v2script::grammar::whitespace_specifier | comment_specifier;
static constexpr auto rule = lexy::dsl::position + lexy::dsl::terminator(lexy::dsl::eof).opt_list(lexy::dsl::p<AssignmentStatement<Options>>);
static constexpr auto value = lexy::as_list<ast::AssignStatementList> >> construct<ast::FileTree>;
};
}
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