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Make dynamic_format_specs construction constexpr

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This commit is contained in:
Victor Zverovich
2017-10-22 10:19:09 -07:00
parent d2f2a8b0ca
commit 529d88ce95
2 changed files with 35 additions and 7 deletions
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28
test/format-test.cc
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@@ -1693,6 +1693,8 @@ struct test_context {
template <typename Id>
constexpr void check_arg_id(Id) {}
constexpr unsigned next_arg_index(const char *&) { return 33; }
};
constexpr fmt::format_specs parse_specs(const char *s) {
@@ -1719,3 +1721,29 @@ TEST(FormatTest, ConstexprSpecsHandler) {
static_assert(parse_specs(".{0}").precision() == 22, "");
static_assert(parse_specs("d").type() == 'd', "");
}
constexpr fmt::internal::dynamic_format_specs<char>
parse_dynamic_specs(const char *s) {
fmt::internal::dynamic_format_specs<char> specs;
test_context ctx;
fmt::internal::dynamic_specs_handler<test_context> h(specs, ctx);
parse_format_specs(s, h);
return specs;
}
TEST(FormatTest, ConstexprDynamicSpecsHandler) {
static_assert(parse_dynamic_specs("<").align() == fmt::ALIGN_LEFT, "");
static_assert(parse_dynamic_specs("*^").fill() == '*', "");
static_assert(parse_dynamic_specs("+").flag(fmt::PLUS_FLAG), "");
static_assert(parse_dynamic_specs("-").flag(fmt::MINUS_FLAG), "");
static_assert(parse_dynamic_specs(" ").flag(fmt::SIGN_FLAG), "");
static_assert(parse_dynamic_specs("#").flag(fmt::HASH_FLAG), "");
static_assert(parse_dynamic_specs("0").align() == fmt::ALIGN_NUMERIC, "");
static_assert(parse_dynamic_specs("42").width() == 42, "");
static_assert(parse_dynamic_specs("{}").width_ref.index == 33, "");
static_assert(parse_dynamic_specs("{42}").width_ref.index == 42, "");
static_assert(parse_dynamic_specs(".42").precision() == 42, "");
static_assert(parse_dynamic_specs(".{}").precision_ref.index == 33, "");
static_assert(parse_dynamic_specs(".{42}").precision_ref.index == 42, "");
static_assert(parse_dynamic_specs("d").type() == 'd', "");
}