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Allow getting size of dynamic format arg store (#4270)

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This commit is contained in:
Hannes Harnisch
2024-12-19 04:54:35 +01:00
committed by GitHub
parent 873670ba3f
commit 7c50da5385
2 changed files with 17 additions and 0 deletions
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3
include/fmt/args.h
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@ -210,6 +210,9 @@ template <typename Context> class dynamic_format_arg_store {
data_.reserve(new_cap); data_.reserve(new_cap);
named_info_.reserve(new_cap_named); named_info_.reserve(new_cap_named);
} }
/// Returns the number of elements in the store.
size_t size() const noexcept { return data_.size(); }
}; };
FMT_END_NAMESPACE FMT_END_NAMESPACE

14
test/args-test.cc
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@ -186,3 +186,17 @@ TEST(args_test, move_constructor) {
store.reset(); store.reset();
EXPECT_EQ(fmt::vformat("{} {} {a1}", moved_store), "42 foo foo"); EXPECT_EQ(fmt::vformat("{} {} {a1}", moved_store), "42 foo foo");
} }
TEST(args_test, size) {
fmt::dynamic_format_arg_store<fmt::format_context> store;
EXPECT_EQ(store.size(), 0);
store.push_back(42);
EXPECT_EQ(store.size(), 1);
store.push_back("Molybdenum");
EXPECT_EQ(store.size(), 2);
store.clear();
EXPECT_EQ(store.size(), 0);
}