45 lines
817 B
C++
45 lines
817 B
C++
// SPDX-License-Identifier: GPL-2.0-or-later
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// Copyright The Music Player Daemon Project
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#ifndef MPD_TAG_VISIT_FALLBACK_HXX
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#define MPD_TAG_VISIT_FALLBACK_HXX
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#include "Fallback.hxx"
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#include "Tag.hxx"
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template<typename F>
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bool
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VisitTagType(const Tag &tag, TagType type, F &&f) noexcept
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{
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bool found = false;
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for (const auto &item : tag) {
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if (item.type == type) {
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found = true;
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f(item.value);
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}
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}
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return found;
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}
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template<typename F>
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bool
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VisitTagWithFallback(const Tag &tag, TagType type, F &&f) noexcept
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{
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return ApplyTagWithFallback(type,
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[&](TagType type2) {
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return VisitTagType(tag, type2, f);
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});
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}
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template<typename F>
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void
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VisitTagWithFallbackOrEmpty(const Tag &tag, TagType type, F &&f) noexcept
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{
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if (!VisitTagWithFallback(tag, type, f))
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f("");
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}
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#endif
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