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[C++] Generate code for vector force_align attribute. (#5796)

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* [Flatbuffer] Generate code for force_align with CreateXDirect and Pack functions.

* Fixed Visual Studio 10.0 compile error for std::to_string.

* Fixed Visual Studio 10.0 compile error for std::to_string.
This commit is contained in:
Myrice
2020-03-12 08:32:29 -07:00
committed by GitHub
parent 95a21327fc
commit 9954e09ab7
3 changed files with 41 additions and 2 deletions
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11
src/idl_parser.cpp
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@@ -1293,8 +1293,15 @@ CheckedError Parser::ParseVector(const Type &type, uoffset_t *ovalue,
});
ECHECK(err);
builder_.StartVector(count * InlineSize(type) / InlineAlignment(type),
InlineAlignment(type));
const auto *force_align = field->attributes.Lookup("force_align");
const size_t align =
force_align ? static_cast<size_t>(atoi(force_align->constant.c_str()))
: 1;
const size_t len = count * InlineSize(type) / InlineAlignment(type);
const size_t elemsize = InlineAlignment(type);
if (align > 1) { builder_.ForceVectorAlignment(len, elemsize, align); }
builder_.StartVector(len, elemsize);
for (uoffset_t i = 0; i < count; i++) {
// start at the back, since we're building the data backwards.
auto &val = field_stack_.back().first;