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248 lines
8.7 KiB
248 lines
8.7 KiB
#pragma once
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#include <charconv>
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#include <concepts>
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#include <functional>
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#include <memory>
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#include <optional>
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#include <set>
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#include <sstream>
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#include <stack>
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#include <string>
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#include <utility>
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#include <variant>
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#include <vector>
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#include "molasses/lexer.h"
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enum class architecture_t {
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x86_64_linux,
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x86_linux
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};
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#if defined(__x86_64__) && __linux__
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constexpr architecture_t architecture = architecture_t::x86_64_linux;
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constexpr size_t architecture_ptr_size = 8;
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#elif defined(__i386) || defined(__i386__) || defined(i386) && __linux__
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constexpr architecture_t architecture = architecture_t::x86_linux;
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constexpr size_t architecture_ptr_size = 4;
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#endif
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namespace molasses {
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namespace details {
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template<typename ...RestT>
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std::string concatenate_builder_impl(std::stringstream& stream)
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requires (sizeof...(RestT) == 0)
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{
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return stream.str();
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}
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template<typename FirstT, typename ...RestT>
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std::string concatenate_builder_impl(std::stringstream& stream, FirstT first, RestT... rest) {
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stream << first;
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return concatenate_builder_impl(stream, rest...);
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}
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template<typename ...RestT>
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std::string concatenate_builder(RestT... rest) {
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std::stringstream stream{};
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return concatenate_builder_impl(stream, rest...);
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}
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}
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struct type {
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[[nodiscard]] virtual std::string name() const = 0;
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[[nodiscard]] virtual size_t byte_size() const = 0;
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};
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inline auto operator<=>(const type& lhs, const type& rhs) {
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return lhs.name() <=> rhs.name();
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}
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struct primitive_type : public type {
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std::string _name;
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size_t _byte_size;
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primitive_type(std::string name, size_t byte_size)
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: _name(std::forward<std::string>(name))
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, _byte_size(byte_size)
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{}
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[[nodiscard]] std::string name() const final {
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return _name;
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}
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[[nodiscard]] size_t byte_size() const final {
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return _byte_size;
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};
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};
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struct parser_context;
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struct ptr_type{
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void* ptr;
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std::shared_ptr<type> pointed;
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};
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using stack_element = std::variant<int32_t, int64_t, ptr_type>;
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using interpreter_stack = std::stack<stack_element>;
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struct generate_context;
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struct operation {
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[[nodiscard]] virtual std::string name() const = 0;
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[[nodiscard]] virtual std::vector<std::string> argument_types() const = 0;
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[[nodiscard]] virtual std::vector<std::string> return_types() const = 0;
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[[nodiscard]] virtual std::vector<std::string> generate(const parser_context&, const lexed_output& lexer_data) const = 0;
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[[nodiscard]] virtual std::vector<std::string> emit(const parser_context&) const = 0;
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virtual void execute(const generate_context&, interpreter_stack&) const = 0;
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};
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struct primitive_operation : public operation {
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std::string _name;
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std::vector<std::string> _args;
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std::vector<std::string> _rets;
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std::vector<std::string> _instructions;
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std::function<void(const generate_context&, interpreter_stack&)> _executable;
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primitive_operation(std::string name, std::vector<std::string> args, std::vector<std::string> rets, std::vector<std::string> body, std::function<void(const generate_context&,interpreter_stack&)> executable)
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: _name(std::forward<std::string>(name))
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, _args(std::forward<std::vector<std::string>>(args))
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, _rets(std::forward<std::vector<std::string>>(rets))
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, _instructions(std::forward<std::vector<std::string>>(body))
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, _executable(std::move(executable))
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{}
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[[nodiscard]] std::string name() const final {
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return _name;
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}
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[[nodiscard]] std::vector<std::string> argument_types() const final {
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return _args;
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}
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[[nodiscard]] std::vector<std::string> return_types() const final {
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return _rets;
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}
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[[nodiscard]] std::vector<std::string> generate(const parser_context&, const lexed_output& lexer_data) const final {
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return {};
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}
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[[nodiscard]] std::vector<std::string> emit(const parser_context&) const final {
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return _instructions;
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}
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void execute(const generate_context& ctx, interpreter_stack& stack) const override {
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_executable(ctx, stack);
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};
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};
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struct procedure_operation : public operation {
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std::string _name;
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std::vector<std::string> _args;
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std::vector<std::string> _rets;
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std::vector<symbol> _body;
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procedure_operation(std::string name, std::vector<std::string> args, std::vector<std::string> rets, std::vector<symbol> body)
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: _name(std::forward<std::string>(name))
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, _args(std::forward<std::vector<std::string>>(args))
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, _rets(std::forward<std::vector<std::string>>(rets))
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, _body(std::forward<std::vector<symbol>>(body))
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{}
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[[nodiscard]] std::string name() const final {
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return _name;
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}
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[[nodiscard]] std::vector<std::string> argument_types() const final {
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return _args;
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}
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[[nodiscard]] std::vector<std::string> return_types() const final {
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return _rets;
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}
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[[nodiscard]] std::vector<std::string> generate(const parser_context&, const lexed_output& lexer_data) const final;
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[[nodiscard]] std::vector<std::string> emit(const parser_context&) const final;
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void execute(const generate_context&, interpreter_stack&) const final;
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};
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inline auto operator<=>(const operation& lhs, const operation& rhs) {
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return lhs.name() <=> rhs.name();
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}
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struct parser_error : public std::runtime_error {
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explicit parser_error(const std::string& str) : std::runtime_error(str) {}
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};
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struct type_input_error : public parser_error {
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type_input_error() : parser_error("Bad type provided") {}
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// TODO: Better error message
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};
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struct value_missing_error : public parser_error {
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value_missing_error() : parser_error("Expected value, none provided") {}
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// TODO: Better error message
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};
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struct procedure_stack_error : public parser_error {
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procedure_stack_error() : parser_error("Expected the stack to look like the return stack upon completion\n") {}
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// TODO: Better error message
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};
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struct unexpected_token_error : public parser_error {
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unexpected_token_error(const symbol& sym, const std::string& found, const std::string& expected)
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: parser_error (
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details::concatenate_builder(
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"Unexpected token encountered\n",
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"\tAt ", sym.file_name,":",sym.line,":",sym.column,"\n",
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"\tExpected ", expected, "\n",
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"\tFound ", found, "\n"
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)
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) {}
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};
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struct expecting_token_error : public parser_error {
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expecting_token_error(const std::string& expected, const std::string& context)
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: parser_error(
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details::concatenate_builder(
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"An expected token has not been encountered before the end of the input\n",
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"\tExpected ", expected,"\n",
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"\t", context,"\n"
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)
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)
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{}
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// TODO: Better error message
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};
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struct unknown_token_error : public parser_error {
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explicit unknown_token_error(const symbol& sym) : parser_error(details::concatenate_builder("An unknown token has been encountered\n", "\tAt ", sym.file_name,":",sym.line,":",sym.column,"\n")) {}
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// TODO: Better error message
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};
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struct type_expected_with_modifier_error : public parser_error {
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type_expected_with_modifier_error() : parser_error("A type is expected before a modifier") {}
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// TODO: Better error message
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};
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std::vector<std::string> operator>>(std::vector<std::string> current_stack, const operation& next_op);
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std::optional<int32_t> try_parse_int32(const std::string& str);
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std::optional<int64_t> try_parse_int64(const std::string& str);
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struct parser_context {
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std::vector<std::shared_ptr<type>> types;
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std::vector<std::shared_ptr<operation>> operations;
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std::vector<std::shared_ptr<procedure_operation>> procedures;
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[[nodiscard]] std::shared_ptr<type> lookup_type(const std::string&) const;
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[[nodiscard]] std::shared_ptr<operation> lookup_operation(const std::string&) const;
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};
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struct generate_context {
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lexed_output lexer;
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parser_context parser;
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std::vector<std::shared_ptr<procedure_operation>> procedures;
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};
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using success_t = bool;
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std::tuple<interpreter_stack, generate_context, std::optional<std::shared_ptr<std::runtime_error>>> interpret(interpreter_stack, generate_context, std::string );
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generate_context parse(parser_context, const lexed_output&);
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std::vector<std::string> generate(const generate_context&);
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parser_context register_integers(parser_context);
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template<architecture_t Arch = architecture>
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parser_context register_i32_operations(parser_context);
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bool type_check(const parser_context&, const lexed_output&, const std::vector<symbol>&, std::vector<std::string> execution_input, const std::vector<std::string>& execution_output);
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}
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