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Merge branch 'json-view/16-view-simd' into json-view/18-view-object-index

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Signed-off-by: Niels Lohmann <mail@nlohmann.me>
This commit is contained in:
Niels Lohmann
2026-09-29 23:26:38 +02:00
parent 95c2fe08a6 50f0a1b75b
commit 58706fdba0
13 changed files with 94 additions and 33 deletions
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single_include/nlohmann/json_view.hpp
+14 -5
View File
@@ -1067,8 +1067,9 @@ class builder
{
const std::uint64_t done = static_cast<std::uint64_t>(at - b) + 1;
const std::uint64_t guess = static_cast<std::uint64_t>(n) * static_cast<std::uint64_t>(e - b + 1) / done;
const std::uint64_t grown = guess + (guess / 4) + 64; // a variable: GCC calls a cast of the sum useless where std::uint64_t is std::size_t
doc.tape_size = n;
doc.reserve((std::max)(static_cast<std::size_t>(guess + (guess / 4) + 64), n + (n / 2) + 64));
doc.reserve((std::max)(static_cast<std::size_t>(grown), n + (n / 2) + 64));
return doc.tape;
}
@@ -1290,6 +1291,14 @@ class builder
return w;
}
/// a compile-time option as a runtime condition: testing the template
/// argument directly makes a condition like `TrailingCommas && c == ']'`
/// constant when the option is off, which MSVC reports as C4127
static NLOHMANN_VIEW_ALWAYS_INLINE bool enabled(bool option) noexcept
{
return option;
}
/// The parse state and the parser proper. The cursor is a local object of
/// run() whose address never escapes (everything it calls out of line is a
/// member of the builder and gets the positions it needs), so that the
@@ -1419,7 +1428,7 @@ arr_next:
{
return false;
}
if (TrailingCommas && cur() == ']')
if (enabled(TrailingCommas) && cur() == ']')
{
++p;
goto close_container;
@@ -1486,7 +1495,7 @@ obj_next:
{
return false;
}
if (TrailingCommas && cur() == '}')
if (enabled(TrailingCommas) && cur() == '}')
{
++p;
goto close_object;
@@ -1636,7 +1645,7 @@ indent_done:
{
++p;
}
if (Comments && cur() == '/')
if (enabled(Comments) && cur() == '/')
{
const unsigned char* const q = cold.comment(p);
if (q == nullptr)
@@ -3354,7 +3363,7 @@ index_status array_index(const StringType& s, std::size_t& idx) noexcept
}
v = (v * 10) + d;
}
if (v >= static_cast<std::uint64_t>((std::numeric_limits<std::size_t>::max)()))
if (v >= (std::numeric_limits<std::size_t>::max)()) // (std::size_t converts to std::uint64_t implicitly)
{
return index_status::too_large;
}