| 1 | // A bare-bones llvm::Optional reimplementation. |
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| 2 | |
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| 3 | template <typename T> struct MyOptionalStorage { |
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| 4 | MyOptionalStorage(T val) : value(val), hasVal(true) {} |
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| 5 | MyOptionalStorage() {} |
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| 6 | T value; |
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| 7 | bool hasVal = false; |
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| 8 | }; |
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| 9 | |
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| 10 | template <typename T> struct MyOptional { |
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| 11 | MyOptionalStorage<T> Storage; |
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| 12 | MyOptional(T val) : Storage(val) {} |
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| 13 | MyOptional() {} |
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| 14 | T &operator*() { return Storage.value; } |
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| 15 | }; |
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| 16 | |
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| 17 | void stop() {} |
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| 18 | |
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| 19 | int main(int argc, char **argv) { |
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| 20 | MyOptional<int> x, y = 42; |
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| 21 | stop(); // break here |
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| 22 | return *y; |
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| 23 | } |
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| 24 | |
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| 25 | // Produced from the assembler in |
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| 26 | // Shell/ScriptInterpreter/Python/Inputs/FormatterBytecode/formatter.py |
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| 27 | __attribute__((used, section("__DATA_CONST,__lldbformatters" ))) unsigned char |
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| 28 | _MyOptional_type_summary[] = |
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| 29 | "\x01" // version |
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| 30 | "\xa4" // record size |
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| 31 | "\x01" // record size |
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| 32 | "\x10" // type name size |
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| 33 | "^MyOptional<.+>$" // type name |
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| 34 | "\x00" // flags |
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| 35 | "\x00" // sig_summary |
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| 36 | "\x8d" // program size |
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| 37 | "\x01" // program size |
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| 38 | "\x1\x22\x7Storage#\x12\x60\x1,C\x10\x1\x5\x11\x2\x1\x22\x6hasVal#" |
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| 39 | "\x12\x60\x1,\x10\x1e\x2\x22\x1b<could not read MyOptional>\x10G#!\x60 " |
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| 40 | "\x0P\x10\x6\x22\x4None\x10\x36\x1#\x15\x60 " |
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| 41 | "\x0#\x16\x60\x5\x22\x5value#\x12\x60\x5#\x17\x60\x1," |
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| 42 | "\x10\x6\x22\x4None\x10\x11\x1#\x0\x60\x1#R\x60\x10\x3# " |
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| 43 | "\x60\x10\x1\x2\x12\x12\x12\x12" ; // summary function |
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| 44 | |
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