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#pragma once
#include <lexy/dsl.hpp>
#include "SimpleGrammar.hpp"
#include "detail/LexyLitRange.hpp"
namespace ovdl::v2script::lua::grammar {
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 = lexy::callback<ast::NodePtr>(
[](auto lexeme) {
std::string str(lexeme.data(), lexeme.size());
return ast::make_node_ptr<ast::IdentifierNode>(ast::NodeLocation { lexeme.begin(), lexeme.end() }, LEXY_MOV(str));
});
};
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 = lexy::callback<ast::NodePtr>(
[](auto lexeme) {
std::string str(lexeme.data(), lexeme.size());
return ast::make_node_ptr<ast::IdentifierNode>(ast::NodeLocation { lexeme.begin(), lexeme.end() }, LEXY_MOV(str));
});
};
template<ParseOptions Options>
struct String {
static constexpr auto rule = [] {
// Arbitrary code points that aren't control characters.
auto c = ovdl::detail::lexydsl::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> >>
lexy::callback<ast::NodePtr>(
[](const char* begin, auto&& str, const char* end) {
return ast::make_node_ptr<ast::StringNode>(ast::NodeLocation::make_from(begin, end), LEXY_MOV(str));
});
};
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::NodePtr>;
};
template<ParseOptions Options>
struct AssignmentStatement {
static constexpr auto rule =
lexy::dsl::position(lexy::dsl::p<Identifier<Options>>) >>
lexy::dsl::equal_sign >>
(lexy::dsl::p<Expression<Options>> | lexy::dsl::recurse_branch<StatementListBlock<Options>>);
static constexpr auto value = lexy::callback<ast::NodePtr>(
[](const char* pos, auto name, lexy::nullopt = {}) {
return LEXY_MOV(name);
},
[](auto name, lexy::nullopt = {}) {
return LEXY_MOV(name);
},
[](const char* pos, auto name, auto&& initalizer) {
return ast::make_node_ptr<ast::AssignNode>(pos, LEXY_MOV(name), LEXY_MOV(initalizer));
});
};
template<ParseOptions Options>
struct StatementListBlock {
static constexpr auto rule =
lexy::dsl::position(lexy::dsl::curly_bracketed.open()) >>
lexy::dsl::opt(
lexy::dsl::list(
lexy::dsl::recurse_branch<AssignmentStatement<Options>>,
lexy::dsl::trailing_sep(lexy::dsl::lit_c<','>))) >>
lexy::dsl::position(lexy::dsl::curly_bracketed.close());
static constexpr auto value =
lexy::as_list<std::vector<ast::NodePtr>> >>
lexy::callback<ast::NodePtr>(
[](const char* begin, lexy::nullopt, const char* end) {
return ast::make_node_ptr<ast::ListNode>(ast::NodeLocation::make_from(begin, end));
},
[](const char* begin, auto&& list, const char* end) {
return ast::make_node_ptr<ast::ListNode>(ast::NodeLocation::make_from(begin, end), LEXY_MOV(list));
},
[](const char* begin, auto& list, const char* end) {
return ast::make_node_ptr<ast::ListNode>(ast::NodeLocation::make_from(begin, end), list);
});
};
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<std::vector<ast::NodePtr>> >> lexy::new_<ast::FileNode, ast::NodePtr>;
};
}
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