83 lines
2.3 KiB
C
83 lines
2.3 KiB
C
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#pragma once
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#include <tuple>
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#include <utility> // std::move, std::forward
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#include "functional/cxx_optional.h"
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#include "functional/cxx_universal.h"
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#include "operators.h"
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namespace sqlite_orm {
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namespace internal {
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template<class L, class R>
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struct and_condition_t;
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template<class L, class R>
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struct or_condition_t;
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/**
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* Is not an operator but a result of c(...) function. Has operator= overloaded which returns assign_t
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*/
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template<class T>
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struct expression_t : condition_t {
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T value;
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expression_t(T value_) : value(std::move(value_)) {}
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template<class R>
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assign_t<T, R> operator=(R r) const {
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return {this->value, std::move(r)};
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}
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assign_t<T, nullptr_t> operator=(nullptr_t) const {
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return {this->value, nullptr};
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}
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#ifdef SQLITE_ORM_OPTIONAL_SUPPORTED
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assign_t<T, std::nullopt_t> operator=(std::nullopt_t) const {
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return {this->value, std::nullopt};
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}
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#endif
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template<class... Args>
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in_t<T, Args...> in(Args... args) const {
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return {this->value, std::make_tuple(std::forward<Args>(args)...), false};
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}
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template<class... Args>
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in_t<T, Args...> not_in(Args... args) const {
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return {this->value, std::make_tuple(std::forward<Args>(args)...), true};
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}
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template<class R>
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and_condition_t<T, R> and_(R right) const {
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return {this->value, std::move(right)};
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}
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template<class R>
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or_condition_t<T, R> or_(R right) const {
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return {this->value, std::move(right)};
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}
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};
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template<class T>
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T get_from_expression(T value) {
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return std::move(value);
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}
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template<class T>
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T get_from_expression(expression_t<T> expression) {
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return std::move(expression.value);
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}
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}
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/**
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* Public interface for syntax sugar for columns. Example: `where(c(&User::id) == 5)` or
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* `storage.update(set(c(&User::name) = "Dua Lipa"));
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*/
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template<class T>
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internal::expression_t<T> c(T value) {
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return {std::move(value)};
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}
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}
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