add an ABI returns structs in some functions, messing up the codegen

[martyall]

No description provided.

[iostat]

Consider the following solidity

contract StructBreakage {
  struct SomeStruct {
    uint256 a;
    address b;
  }

  mapping(bytes32 => SomeStruct) public tonsOfStructs;

  function getAStruct(bytes32 k) public view returns (SomeStruct memory) {
    return tonsOfStructs[k];
  }
}

notice the mapping is defined as public, which means solc generates an accessor function. The accessor function that solc generates, however, will destructure SomeStruct into its components, i.e.:

// autogenerated by solc since tonsOfStructs is `mapping(...) public`:
function tonsOfStructs(bytes32 k) public view returns (uint256 a, address b) {
  return (tonsOfStructs[k].a, tonsOfStructs[k].b)
}

purescript-web3-codegen is perfectly happy with that ABI, since it's just a normal tuple. However, for getAStruct, it seems to think that since there's only one element in the outputs, it must be returning a single value, i.e. Tuple1 { a :: IntN 256, b :: Address }, when, well, that kinda makes no sense.

---

Anyway, I threw in a couple of combinations of struct sizes and combinations of (struct, primitive) in that ABI.

I think I accidentally defined S2A as struct S2A { uint96 d; }) -- so don't let that throw you off in the ABI for getS2A and s2as. Unfortunately my browser tab with the actual Solidity crashed, otherwise I would've fixed that before pushing. There might be another weird one, just assume the ABI makes sense (i.e., not a solc bug) if the names don't immediately match up with what they suggest.