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LibJS: Add a fallible ThrowableStringBuilder::appendff

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Timothy Flynn 2023-02-10 11:34:20 -05:00 committed by Linus Groh
parent 7163e4d456
commit 519a1cd23d
1 changed files with 14 additions and 0 deletions
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14
Userland/Libraries/LibJS/Runtime/ThrowableStringBuilder.h
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@ -6,6 +6,7 @@
#pragma once
#include <AK/Format.h>
#include <AK/StringBuilder.h>
#include <AK/StringView.h>
#include <LibJS/Forward.h>
@ -25,6 +26,19 @@ public:
ThrowCompletionOr<void> append_code_point(u32 value);
ThrowCompletionOr<String> to_string() const;
template<typename... Parameters>
ThrowCompletionOr<void> appendff(CheckedFormatString<Parameters...>&& fmtstr, Parameters const&... parameters)
{
AK::VariadicFormatParams<AK::AllowDebugOnlyFormatters::No, Parameters...> variadic_format_params { parameters... };
if (vformat(*this, fmtstr.view(), variadic_format_params).is_error()) {
// The size returned here is a bit of an estimate, as we don't know what the final formatted string length would be.
return m_vm.throw_completion<InternalError>(ErrorType::NotEnoughMemoryToAllocate, length() + fmtstr.view().length());
}
return {};
}
using AK::StringBuilder::is_empty;
using AK::StringBuilder::string_view;
using AK::StringBuilder::trim;