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

#include "error.hpp"

const char* compiler_error::what() const noexcept {
    return "an error occured while compiling the program";
}

void compiler_error::print_about(std::ostream& to) {
    to << what() << ": ";
    to << description << std::endl;
}

void compiler_error::print_location(std::ostream& to, file_mgr& fm, bool highlight) {
    if(!loc) return;
    to << "occuring on line " << loc->begin.line << ":" << std::endl;
    fm.print_location(to, *loc, highlight);
}

void compiler_error::pretty_print(std::ostream& to, file_mgr& fm) {
    print_about(to);
    print_location(to, fm);
}

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, file_mgr& fm) {
    print_about(to);
    print_location(to, fm, true);
}

void unification_error::pretty_print(std::ostream& to, file_mgr& fm, type_mgr& mgr) {
    type_error::pretty_print(to, fm);
    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;
}