solidity/test/libsolidity/syntaxTests/abiEncoder/v2_v1_v2_modifier_sandwich.sol

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==== Source: A ====
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pragma abicoder v2;
struct Data {
bool flag;
}
contract A {
function get() public view returns (Data memory) {}
}
==== Source: B ====
import "A";
contract B {
modifier validate() {
A(address(0x00)).get();
_;
}
}
==== Source: C ====
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pragma abicoder v2;
import "B";
contract C is B {
function foo()
public
validate()
{}
}
// ----
// TypeError 2428: (B:60-82): The type of return parameter 1, struct Data, is only supported in ABI coder v2. Use "pragma abicoder v2;" to enable the feature.