A Hugo incarnation of the blog. https://danilafe.com
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#pragma once
#include <exception>
#include "type.hpp"
struct type_error : std::exception {
std::string description;
type_error(std::string d)
: description(std::move(d)) {}
const char* what() const noexcept override;
struct unification_error : public type_error {
type_ptr left;
type_ptr right;
unification_error(type_ptr l, type_ptr r)
: left(std::move(l)), right(std::move(r)),
type_error("failed to unify types") {}