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https://github.com/ton-blockchain/ton
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f3e620f48c
This commit introduces nullable types `T?` that are distinct from non-nullable `T`. Example: `int?` (int or null) and `int` are different now. Previously, `null` could be assigned to any primitive type. Now, it can be assigned only to `T?`. A non-null assertion operator `!` was also introduced, similar to `!` in TypeScript and `!!` in Kotlin. If `int?` still occupies 1 stack slot, `(int,int)?` and other nullable tensors occupy N+1 slots, the last for "null precedence". `v == null` actually compares that slot. Assigning `(int,int)` to `(int,int)?` implicitly creates a null presence slot. Assigning `null` to `(int,int)?` widens this null value to 3 slots. This is called "type transitioning". All stdlib functions prototypes have been updated to reflect whether they return/accept a nullable or a strict value. This commit also contains refactoring from `const FunctionData*` to `FunctionPtr` and similar.
23 lines
777 B
Text
23 lines
777 B
Text
import "@stdlib/tvm-dicts"
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fun prepareDict_3_30_4_40_5_x(valueAt5: int): cell? {
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var dict: cell? = createEmptyDict();
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dict.iDictSetBuilder(32, 3, beginCell().storeInt(30, 32));
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dict.iDictSetBuilder(32, 4, beginCell().storeInt(40, 32));
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dict.iDictSetBuilder(32, 5, beginCell().storeInt(valueAt5, 32));
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return dict;
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}
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fun lookupIdxByValue(idict32: cell?, value: int): int {
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var cur_key: int? = -1;
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do {
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var (cur_key redef, cs: slice?, found: bool) = idict32.iDictGetNext(32, cur_key!);
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// one-line condition (via &) doesn't work, since right side is calculated immediately
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if (found) {
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if (cs!.loadInt(32) == value) {
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return cur_key!;
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}
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}
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} while (found);
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return -1;
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}
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