blog-static/code/compiler/13/error.cpp

#include "error.hpp"

const char* type_error::what() const noexcept {
    return "an error occured while checking the types of the program";
}

void type_error::pretty_print(std::ostream& to, parse_driver& drv) {
    to << "encountered error while typechecking program: ";
    to << description << std::endl;

    if(loc) {
        to << "occuring on line " << loc->begin.line << ":" << std::endl;
        to << std::endl << "```" << std::endl;
        drv.print_highlighted_location(to, *loc);
        to << "```" << std::endl << std::endl;
    }
}

void unification_error::pretty_print(std::ostream& to, parse_driver& drv, type_mgr& mgr) {
    type_error::pretty_print(to, drv);
    to << "the expected type was:" << std::endl;
    to << "  \033[34m";
    left->print(mgr, to);
    to << std::endl << "\033[0mwhile the actual type was:" << std::endl;
    to << "  \033[32m";
    right->print(mgr, to);
    to << "\033[0m" << std::endl;
}