SyntaxError.h

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#pragma once
 
#include <string>
#include <memory>
#include <cstdint>
#include <stdexcept>
#include <bpp_include/bpp.h>
#include <error/detail.h>
#include <error/ParserError.h>
 
namespace bpp::ErrorHandling {
 
void print_syntax_error_or_warning(
    const std::string& source_file,
    uint32_t line,
    uint32_t column,
    uint32_t text_length,
    const std::string& msg,
    const std::vector<std::string>& include_chain,
    std::shared_ptr<bpp::bpp_program> program,
    bool lsp_mode,
    bool is_warning = false);
 
void print_parser_errors(
    const std::vector<AST::ParserError>& errors,
    const std::string& source_file,
    const std::vector<std::string>& include_chain,
    std::shared_ptr<bpp::bpp_program> program,
    bool lsp_mode
);
 
class ErrorOrWarning : public std::runtime_error {
    protected:
        std::string source_file;
        uint32_t line = 0;
        uint32_t column = 0;
        uint32_t text_length = 0;
        std::vector<std::string> include_chain;
        std::shared_ptr<bpp::bpp_program> program;
        bool lsp_mode = false;
        bool is_warning = false;
 
        template <bpp::detail::ErrorReportableListener Listener, bpp::detail::ASTNodePtrORToken T>
        void set_from_listener(Listener* listener, T error_ctx) {
            source_file = listener->get_source_file();
            include_chain = listener->get_include_stack();
            program = listener->get_program();
            lsp_mode = listener->get_lsp_mode();
 
            text_length = 1;
            if constexpr (bpp::detail::ASTNodePtrType<T>) {
                line = error_ctx->getPosition().line;
                column = error_ctx->getPosition().column;
                if (error_ctx->getEndPosition().line == error_ctx->getPosition().line) {
                    text_length = error_ctx->getEndPosition().column - error_ctx->getPosition().column;
                }
            } else if constexpr(bpp::detail::ASTStringToken<T>) {
                line = error_ctx.getLine();
                column = error_ctx.getCharPositionInLine();
                text_length = static_cast<uint32_t>(error_ctx.getValue().length());
            } else if constexpr(bpp::detail::ASTParameterToken<T>) {
                // Special case: Error reporting on a declared method parameter
                // TODO(@rail5): Kind of hacky to handle special cases. Would prefer a general solution.
                line = error_ctx.getLine();
                column = error_ctx.getCharPositionInLine();
                auto param = error_ctx.getValue();
                text_length = 0;
                if (param.type.has_value()) {
                    text_length += 1 + static_cast<uint32_t>(param.type.value().getValue().length()); // '@Type'
                    if (param.pointer) text_length += 1; // '*'
                    text_length += 1 + static_cast<uint32_t>(param.name.getValue().length()); // ' Name'
                } else {
                    text_length = static_cast<uint32_t>(param.name.getValue().length()); // 'Name'
                }
            }
        }
    public:
        ErrorOrWarning() = delete;
        explicit ErrorOrWarning(const std::string& msg) = delete;
 
        template <bpp::detail::ErrorReportableListener Listener, bpp::detail::ASTNodePtrORToken T>
        ErrorOrWarning(Listener* listener, const T& error_ctx, const std::string& msg) : std::runtime_error(msg) {
            set_from_listener(listener, error_ctx);
        }
        
        void print() const {
            print_syntax_error_or_warning(
                source_file,
                line,
                column,
                text_length,
                this->what(),
                include_chain,
                program,
                lsp_mode,
                is_warning
            );
        }
};
 
class SyntaxError : public ErrorOrWarning {
    public:
        SyntaxError() = delete;
        explicit SyntaxError(const std::string& msg) = delete;
 
        template <bpp::detail::ErrorReportableListener Listener, bpp::detail::ASTNodePtrORToken T>
        SyntaxError(Listener* listener, const T& error_ctx, const std::string& msg) : ErrorOrWarning(listener, error_ctx, msg) {
            is_warning = false;
        }
};
 
class Warning : public ErrorOrWarning {
    public:
        Warning() = delete;
        explicit Warning(const std::string& msg) = delete;
 
        template <bpp::detail::ErrorReportableListener Listener, bpp::detail::ASTNodePtrORToken T>
        Warning(Listener* listener, const T& error_ctx, const std::string& msg) : ErrorOrWarning(listener, error_ctx, msg) {
            is_warning = true;
        }
};
 
// Helper functions
// Should probably be moved to a separate file or somehow better organized
std::string utf8_substr(const std::string& str, uint32_t start, uint32_t length);
uint32_t utf8_length(const std::string& str);
std::string equal_width_padding(const std::string& str, char padding_char = ' ');
 
} // namespace bpp::ErrorHandling