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{
  "id": "92cee3a25070d1793d4697a3252d7dc4",
  "_format": "hh-sol-build-info-1",
  "solcVersion": "0.8.2",
  "solcLongVersion": "0.8.2+commit.661d1103",
  "input": {
    "language": "Solidity",
    "sources": {
      "contracts/WithConst.sol": {
        "content": "//SPDX-License-Identifier: MIT\npragma solidity ^0.8.0;\n\ncontract WithConst {\n    uint256 public value;\n    constructor(uint256 initialValue) {\n        value = initialValue;\n    }\n\n    function greet() public returns(uint256) {\n        return value;\n    }\n}\n"

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{
  "id": "d152393456c388db1a14d8a833bc35a9",
  "_format": "hh-sol-build-info-1",
  "solcVersion": "0.8.2",
  "solcLongVersion": "0.8.2+commit.661d1103",
  "input": {
    "language": "Solidity",
    "sources": {
      "contracts/VaultUUPS.sol": {
        "content": "//SPDX-License-Identifier: MIT\npragma solidity ^0.8.0;\n\nimport \"./Proxiable.sol\";\nimport \"./Vault.sol\";\n\ncontract VaultProxiable is Vault, Proxiable {\n  function _beforeUpgrade(address newImplementation) internal virtual override onlyAdmin {\n  }\n}\n\ncontract VaultProxiableV2 is VaultV2, Proxiable {\n  function _beforeUpgrade(address newImplementation) internal virtual override onlyAdmin {\n  }\n}\n\ncontract VaultProxiableV3 is VaultV3, Proxiable {\n  function _beforeUpgrade(address newImplementation) internal virtual override onlyAdmin {\n  }\n}"

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{
  "id": "1c0394f32c0868f623d0d7a071078ffb",
  "_format": "hh-sol-build-info-1",
  "solcVersion": "0.8.2",
  "solcLongVersion": "0.8.2+commit.661d1103",
  "input": {
    "language": "Solidity",
    "sources": {
      "contracts/Proxiable.sol": {
        "content": "// SPDX-License-Identifier: MIT\n\npragma solidity ^0.8.0;\n\nlibrary StorageSlot {\n    struct AddressSlot { address value; }\n    struct BooleanSlot { bool value; }\n    struct Bytes32Slot { bytes32 value; }\n    struct Uint256Slot { uint256 value; }\n\n    function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) { assembly { r.slot := slot } }\n    function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) { assembly { r.slot := slot } }\n    function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) { assembly { r.slot := slot } }\n    function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) { assembly { r.slot := slot } }\n\n    // TODO: ad

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[
    {
        "inputs": [
            {
                "internalType": "uint256",
                "name": "minDelay",
                "type": "uint256"
            },
            {
                "internalType": "address[]",

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ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEArlNte/eRXh5rFRFbKzqIb15Vir2gyyLCu1Lfq5oLGCNS4XFTN9zZTJLFg+g3iY4K5x7omKK/+D+fRvcHRT0T8/pt2zfHpmNV7qZDkwiJSBEyO2o/51/BM/4Pfd03jrYlt3MTwYL8s0BqFAztRJEhg3oqIbFZDYRTCjGelwQ4NCbGAjQPuXkZIF60LuyorH02BjNBwaWAJxcK9FDz9rF8aXM7L59AoZZNDpPJp8HjX6LtwrQvQoSQ7RcwrTCa6RR6JOPh8KraqhYkZLwa2Wo2AU3YESo+RdzMaUaEFy98NeVTpQbGI5lXVdrFjPj5RyT9iyLsm/zNn7nKpLFPL58eFQ== [email protected]

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module Foo
  abstract def foo_sth
end

class SomeFoo
  include Foo
end

class Bar
  def initialize(@foo : Foo)

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How we build crystal, the executable

Note: most of this article is simply an incomplete natural language narration of what Crystal's Makefile specifies. If you, like me, feel a bit intimidated by Make, you may find this article more welcoming than venturing into the code by yourself and figuring things out from scratch.

At the root level of crystal-lang/crystal there's a Makefile that triggers the build process. The default task in that Makefile is crystal. That task checks whether there's a .build/crystal executable. To build the executable, you first need its dependencies (DEPS) and the source code (SOURCES).

With the dependencies built and the list of source code files, we are ready to compile Crystal, by running a previous version of the compiler that sits at bin/crystal. The new compiler will be written to .build/crystal.

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def get() 
  if 2 > 1
    {"String", {"foo" => "bar"}}
  else
    nil
  end
end

x = get
case x; when {String, Hash}; p typeof(x); end

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require "json"

class Blog
  JSON.mapping({
    name:                {type: String},
    likes:               {type: Int32},
    following:           {type: Int32},
    default_post_format: {type: String},
  })
end

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# Include this file in your project's root folder to integrate with CircleCI.
# Replace 0.18.0 with the Crystal version you're using.
dependencies:
  cache_directories:
    - "crystal-0.18.0-1"
  pre:
    - if [[ ! -e crystal-0.18.0-1 ]]; then wget https://github.com/crystal-lang/crystal/releases/download/0.18.0/crystal-0.18.0-1-linux-x86_64.tar.gz && tar xvfz crystal-0.18.0-1-linux-x86_64.tar.gz; fi
test:
  pre:
    - crystal-0.18.0-1/bin/crystal deps