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I am going through the solidity docs and I have seen that:

    // Functions can
    // be accessed directly or through `this.f`,
    // but the latter provides an external view
    // to the function. Especially in the constructor,
    // you should not access functions externally,
    // because the function does not exist yet.

At what circumstances should you use this in a constructor?

1 Answer 1

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You can do this:

constructor() {
  foo();
}

function foo() public {
...

but you cannot do this:

constructor() {
  this.foo(); // external call to non-existant function
}

function foo() external {

foo() is indeed available as an external function from functions but the constructor doesn't "write" the code until the end, so foo() does not exist until the constructor is finished.

Hope it helps.

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