Huff -- Inheritance pattern for CONSTRUCTOR() / MAIN()

0ERC20Main.huff

// This is the main file that will be compiled

/* Imports */
#include "./ERC20.huff"
#include "./utils/Ownable.huff"

#define macro CONSTRUCTOR() = takes (0) returns (0) {
    OWNABLE_CONSTRUCTOR()
    ERC20_CONSTRUCTOR()
}

#define macro MAIN() = takes (0) returns (0) {
    ERC20_MAIN()
    OWNABLE_MAIN()

    0x00 0x00 revert
}

ERC20.huff

// .. this is a partial file, only relevant fns are shown, constructor() and main()

#define macro ERC20_CONSTRUCTOR() = takes(0) returns (0) {
    chainid [INITIAL_CHAIN_ID] sstore                                          // []
    COMPUTE_DOMAIN_SEPARATOR()                                                 // [DOMAIN SEPARATOR]
    [INITIAL_DOMAIN_SEPARATOR] sstore                                          // []
}

#define macro ERC20_MAIN() = takes(0) returns (0) {
    NON_PAYABLE()

    // Identify which function is being called.
    0x00 calldataload 0xE0 shr                                                 // [fn sig]
    dup1 __FUNC_SIG(transfer)           eq transferJump         jumpi
    dup1 __FUNC_SIG(transferFrom)       eq transferFromJump     jumpi
    dup1 __FUNC_SIG(mint)               eq mintJump             jumpi
    dup1 __FUNC_SIG(balanceOf)          eq balanceOfJump        jumpi

    done jump

    transferJump:
    TRANSFER()

    transferFromJump:
    TRANSFER_FROM()

    mintJump:
    MINT()

    balanceOfJump:
    BALANCE_OF()

    done:

}

Ownable.huff

// .. this is a partial file, only relevant fns are shown, constructor() and main()

#define macro OWNABLE_CONSTRUCTOR() = takes (0) returns (0) {
    caller [OWNER_POINTER] sstore
}

#define macro OWNABLE_MAIN() = takes(0) returns (0) {
    // Identify which function is being called.
    0x00 calldataload 0xE0 shr
    dup1 0xa9059cbb eq onlyOwner jumpi
    dup1 0x40c10f19 eq setOwner jumpi

    done jump  // NOTE: Does not revert if not found

    ownlyOwner:
        OWNLYOWNER()
    setOwner:
        SETOWNER()

    done:
}