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40 lines
760 B
40 lines
760 B
4 years ago
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contract A {
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uint s_a;
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/* Direct state change in assert is NOT ok */
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function bad0() public {
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assert((s_a += 1) > 10);
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}
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/* Direct state change in assert is NOT ok */
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function bad1(uint256 a) public {
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assert((s_a += a) > 10);
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}
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/* State change via functions calls in assert is NOT ok */
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function bad2_callee() public returns (bool) {
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return (s_a += 1) > 10;
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}
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function bad2() public {
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assert(bad2_callee());
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}
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/* Parameter use is ok */
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function good0(uint256 a) public {
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assert(a > 10);
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}
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/* Parameter change is ok */
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function good1(uint256 a) public {
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assert((a += 1) > 10);
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}
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/* State change in require is ok */
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function good2(uint256 a) public {
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require(a == (s_a += 1));
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}
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}
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