erick-alcachofa
85a34bdd65
Initial version of Tokenizer and Token Generator template for coroutines (used in tokenizer) Utilities like string related functions, TrieMap, and error handling TODO: Add tests for Tokenizer TODO: Add tests for Generator
85 lines
1.9 KiB
C++
85 lines
1.9 KiB
C++
#pragma once
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#include <cstddef>
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#include <string>
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#include <expected>
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#include <format>
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namespace arti::lang {
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enum struct ExceptCode {
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ecEOF,
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ecEOB,
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ecInvalidToken,
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ecStdException,
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ecInvalidLiteral,
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ecInvalidCharacter,
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ecInvalidIndex,
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};
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struct Exception {
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size_t line;
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size_t column;
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std::string message;
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};
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template <typename T, typename E = Exception>
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using Expected = std::expected<T, E>;
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template <typename E = Exception>
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using Unexpected = std::unexpected<E>;
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template <ExceptCode code, typename... Args>
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std::string exceptionMessage(Args &&...args) {
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using enum ExceptCode;
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if constexpr (code == ecEOF) {
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return "Reached EOF";
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}
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else if constexpr (code == ecEOB) {
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return "Buffer empty";
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}
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else if constexpr (code == ecStdException) {
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return std::format(
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"Catched instance of {}: '{}'",
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std::forward<Args>(args)...
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);
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}
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else if constexpr (code == ecInvalidLiteral) {
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return std::format(
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"Invalid literal, expected {} got {}",
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std::forward<Args>(args)...
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);
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}
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else if constexpr (code == ecInvalidCharacter) {
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return std::format(
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"Invalid character found '{}'",
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std::forward<Args>(args)...
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);
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}
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else if constexpr (code == ecInvalidToken) {
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return std::format(
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"Invalid token found '{}'",
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std::forward<Args>(args)...
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);
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}
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else if constexpr (code == ecInvalidIndex) {
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return "Invalid index";
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}
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else {
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return "Unknown error";
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}
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}
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template <ExceptCode code, typename... Args>
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static inline Unexpected<>
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langException(size_t line, size_t col, Args &&...args) {
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return Unexpected{
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Exception{ line,
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col, exceptionMessage<code>(std::forward<Args>(args)...) }
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};
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}
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} // namespace arti::lang
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