9a9c1d4a61
Compared to the python version, this also does type checking and error handling, so it's slightly longer, however, it's still comfortably under 500 lines.
42 lines
1.4 KiB
C++
42 lines
1.4 KiB
C++
// A bare-bones llvm::Optional reimplementation.
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template <typename T> struct MyOptionalStorage {
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MyOptionalStorage(T val) : value(val), hasVal(true) {}
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MyOptionalStorage() {}
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T value;
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bool hasVal = false;
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};
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template <typename T> struct MyOptional {
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MyOptionalStorage<T> Storage;
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MyOptional(T val) : Storage(val) {}
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MyOptional() {}
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T &operator*() { return Storage.value; }
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};
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void stop() {}
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int main(int argc, char **argv) {
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MyOptional<int> x, y = 42;
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stop(); // break here
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return *y;
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}
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__attribute__((used, section("__DATA_CONST,__lldbformatters"))) unsigned char
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_MyOptional_type_summary[] =
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"\x01" // version
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"\xa4" // record size
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"\x01" // record size
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"\x10" // type name size
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"^MyOptional<.+>$" // type name
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"\x00" // flags
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"\x00" // sig_summary
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"\x8d" // program size
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"\x01" // program size
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"\x1\x22\x7Storage#\x12\x60\x1,C\x10\x1\x5\x11\x2\x1\x22\x6hasVal#"
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"\x12\x60\x1,\x10\x1e\x2\x22\x1b<could not read MyOptional>\x10G#!\x60 "
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"\x0P\x10\x6\x22\x4None\x10\x36\x1#\x15\x60 "
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"\x0#\x16\x60\x5\x22\x5value#\x12\x60\x5#\x17\x60\x1,"
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"\x10\x6\x22\x4None\x10\x11\x1#\x0\x60\x1#R\x60\x10\x3# "
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"\x60\x10\x1\x2\x12\x12\x12\x12"; // summary function
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