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153 lines
5.3 KiB
153 lines
5.3 KiB
#pragma once
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#include <string>
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#include <set>
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#include <vector>
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#include <memory>
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#include <optional>
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#include <charconv>
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#include <concepts>
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#include "molasses/lexer.h"
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namespace molasses {
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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 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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};
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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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primitive_operation(std::string name, std::vector<std::string> args, std::vector<std::string> rets, std::vector<std::string> 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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, _instructions(std::forward<std::vector<std::string>>(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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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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};
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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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};
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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 TypeInputError : std::runtime_error {
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TypeInputError() : std::runtime_error("Bad type provided") {}
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// TODO: Better error message
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};
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struct ValueMissingError : std::runtime_error {
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ValueMissingError() : std::runtime_error("Expected value, none provided") {}
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// TODO: Better error message
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};
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struct ProcedureStackError : std::runtime_error {
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ProcedureStackError() : std::runtime_error("Expected the stack to look like the return stack upon completion") {}
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// TODO: Better error message
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};
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struct UnexpectedTokenError : std::runtime_error {
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UnexpectedTokenError() : std::runtime_error("An unexpected token has been encountered") {}
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// TODO: Better error message
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};
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struct ExpectingTokenError : std::runtime_error {
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ExpectingTokenError() : std::runtime_error("An expected token has not been encountered before the end of the input") {}
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// TODO: Better error message
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};
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struct UnknownTokenError : std::runtime_error {
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UnknownTokenError() : std::runtime_error("An unknown token has not been encountered") {}
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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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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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[[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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parser_context parse(parser_context, const lexed_output&);
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parser_context register_integers(parser_context);
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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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