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https://github.com/ton-blockchain/ton
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ef5719d7e6
In stdlib, all existing pure functions are asm-implemented. But since we introduced a `pure` keyword applicable to user-defined functions, we need to check that they won't have any side effects (exceptions, globals modification, etc.)
23 lines
531 B
Text
23 lines
531 B
Text
(int, int, int, int) compute_data_size?(cell c, int max_cells) pure asm "CDATASIZEQ NULLSWAPIFNOT2 NULLSWAPIFNOT";
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builder begin_cell() pure asm "NEWC";
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cell end_cell(builder b) pure asm "ENDC";
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(int, int) validate_input(cell input) pure {
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var (x, y, z, correct) = compute_data_size?(input, 10);
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throw_unless(102, correct);
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}
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int main() pure {
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cell c = begin_cell().end_cell();
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validate_input(c);
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return 0;
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}
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{-
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@compilation_should_fail
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@stderr
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"""
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An impure operation in a pure function
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throw_unless
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"""
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-}
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