Install reqwest in http example, hack bindgen

Cargo.lock

@@ -146,16 +146,16 @@ checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
 
 [[package]]
 name = "backtrace"
-version = "0.3.65"
+version = "0.3.66"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "11a17d453482a265fd5f8479f2a3f405566e6ca627837aaddb85af8b1ab8ef61"
+checksum = "cab84319d616cfb654d03394f38ab7e6f0919e181b1b57e1fd15e7fb4077d9a7"
 dependencies = [
  "addr2line",
  "cc",
  "cfg-if 1.0.0",
  "libc",
  "miniz_oxide",
- "object 0.28.4",
+ "object 0.29.0",
  "rustc-demangle",
 ]
 
@@ -237,9 +237,9 @@ dependencies = [
 
 [[package]]
 name = "bitvec"
-version = "1.0.0"
+version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1489fcb93a5bb47da0462ca93ad252ad6af2145cce58d10d46a83931ba9f016b"
+checksum = "1bc2832c24239b0141d5674bb9174f9d68a8b5b3f2753311927c172ca46f7e9c"
 dependencies = [
  "funty 2.0.0",
  "radium 0.7.0",
@@ -330,9 +330,9 @@ dependencies = [
 
 [[package]]
 name = "bytemuck"
-version = "1.9.1"
+version = "1.10.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cdead85bdec19c194affaeeb670c0e41fe23de31459efd1c174d049269cf02cc"
+checksum = "c53dfa917ec274df8ed3c572698f381a24eef2efba9492d797301b72b6db408a"
 dependencies = [
  "bytemuck_derive",
 ]
@@ -475,9 +475,9 @@ dependencies = [
 
 [[package]]
 name = "clap"
-version = "3.2.8"
+version = "3.2.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "190814073e85d238f31ff738fcb0bf6910cedeb73376c87cd69291028966fd83"
+checksum = "d646c7ade5eb07c4aa20e907a922750df0c448892513714fd3e4acbc7130829f"
 dependencies = [
  "atty",
  "bitflags",
@@ -660,9 +660,9 @@ checksum = "fbdcdcb6d86f71c5e97409ad45898af11cbc995b4ee8112d59095a28d376c935"
 
 [[package]]
 name = "const_format"
-version = "0.2.25"
+version = "0.2.26"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2906f2480cdc015e998deac388331a0f1c1cd88744948c749513020c83c370bc"
+checksum = "939dc9e2eb9077e0679d2ce32de1ded8531779360b003b4a972a7a39ec263495"
 dependencies = [
  "const_format_proc_macros",
 ]
@@ -801,9 +801,9 @@ dependencies = [
 
 [[package]]
 name = "corosensei"
-version = "0.1.2"
+version = "0.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ab4b310cff9117ec16d05970743c20df3eaddafd461829f2758e76a8de2863a9"
+checksum = "9847f90f32a50b0dcbd68bc23ff242798b13080b97b0569f6ed96a45ce4cf2cd"
 dependencies = [
  "autocfg",
  "cfg-if 1.0.0",
@@ -1019,9 +1019,9 @@ dependencies = [
 
 [[package]]
 name = "crypto-common"
-version = "0.1.3"
+version = "0.1.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "57952ca27b5e3606ff4dd79b0020231aaf9d6aa76dc05fd30137538c50bd3ce8"
+checksum = "2ccfd8c0ee4cce11e45b3fd6f9d5e69e0cc62912aa6a0cb1bf4617b0eba5a12f"
 dependencies = [
  "generic-array 0.14.5",
  "typenum",
@@ -1246,7 +1246,7 @@ checksum = "64fba5a42bd76a17cad4bfa00de168ee1cbfa06a5e8ce992ae880218c05641a9"
 dependencies = [
  "byteorder",
  "dynasm",
- "memmap2 0.5.4",
+ "memmap2 0.5.5",
 ]
 
 [[package]]
@@ -1713,9 +1713,9 @@ dependencies = [
 
 [[package]]
 name = "hashbrown"
-version = "0.12.1"
+version = "0.12.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "db0d4cf898abf0081f964436dc980e96670a0f36863e4b83aaacdb65c9d7ccc3"
+checksum = "607c8a29735385251a339424dd462993c0fed8fa09d378f259377df08c126022"
 dependencies = [
  "ahash",
  "bumpalo",
@@ -1805,7 +1805,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "10a35a97730320ffe8e2d410b5d3b69279b98d2c14bdb8b70ea89ecf7888d41e"
 dependencies = [
  "autocfg",
- "hashbrown 0.12.1",
+ "hashbrown 0.12.2",
  "serde",
 ]
 
@@ -2153,9 +2153,9 @@ dependencies = [
 
 [[package]]
 name = "memmap2"
-version = "0.5.4"
+version = "0.5.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d5172b50c23043ff43dd53e51392f36519d9b35a8f3a410d30ece5d1aedd58ae"
+checksum = "3a79b39c93a7a5a27eeaf9a23b5ff43f1b9e0ad6b1cdd441140ae53c35613fc7"
 dependencies = [
  "libc",
 ]
@@ -2556,7 +2556,7 @@ checksum = "21158b2c33aa6d4561f1c0a6ea283ca92bc54802a93b263e910746d679a7eb53"
 dependencies = [
  "crc32fast",
  "flate2",
- "hashbrown 0.12.1",
+ "hashbrown 0.12.2",
  "indexmap",
  "memchr",
 ]
@@ -2595,9 +2595,9 @@ dependencies = [
 
 [[package]]
 name = "once_cell"
-version = "1.12.0"
+version = "1.13.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7709cef83f0c1f58f666e746a08b21e0085f7440fa6a29cc194d68aac97a4225"
+checksum = "18a6dbe30758c9f83eb00cbea4ac95966305f5a7772f3f42ebfc7fc7eddbd8e1"
 
 [[package]]
 name = "oorandom"
@@ -2906,15 +2906,15 @@ dependencies = [
 
 [[package]]
 name = "plotters-backend"
-version = "0.3.2"
+version = "0.3.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d88417318da0eaf0fdcdb51a0ee6c3bed624333bff8f946733049380be67ac1c"
+checksum = "193228616381fecdc1224c62e96946dfbc73ff4384fba576e052ff8c1bea8142"
 
 [[package]]
 name = "plotters-svg"
-version = "0.3.1"
+version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "521fa9638fa597e1dc53e9412a4f9cefb01187ee1f7413076f9e6749e2885ba9"
+checksum = "e0918736323d1baff32ee0eade54984f6f201ad7e97d5cfb5d6ab4a358529615"
 dependencies = [
  "plotters-backend",
 ]
@@ -3196,9 +3196,9 @@ dependencies = [
 
 [[package]]
 name = "regex"
-version = "1.5.6"
+version = "1.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d83f127d94bdbcda4c8cc2e50f6f84f4b611f69c902699ca385a39c3a75f9ff1"
+checksum = "4c4eb3267174b8c6c2f654116623910a0fef09c4753f8dd83db29c48a0df988b"
 dependencies = [
  "aho-corasick",
  "memchr",
@@ -3213,9 +3213,9 @@ checksum = "6c230d73fb8d8c1b9c0b3135c5142a8acee3a0558fb8db5cf1cb65f8d7862132"
 
 [[package]]
 name = "regex-syntax"
-version = "0.6.26"
+version = "0.6.27"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "49b3de9ec5dc0a3417da371aab17d729997c15010e7fd24ff707773a33bddb64"
+checksum = "a3f87b73ce11b1619a3c6332f45341e0047173771e8b8b73f87bfeefb7b56244"
 
 [[package]]
 name = "region"
@@ -3287,7 +3287,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cec2b3485b07d96ddfd3134767b8a447b45ea4eb91448d0a35180ec0ffd5ed15"
 dependencies = [
  "bytecheck",
- "hashbrown 0.12.1",
+ "hashbrown 0.12.2",
  "ptr_meta",
  "rend",
  "rkyv_derive",
@@ -3319,7 +3319,7 @@ name = "roc-bindgen"
 version = "0.1.0"
 dependencies = [
  "bumpalo",
- "clap 3.2.8",
+ "clap 3.2.11",
  "cli_utils",
  "ctor",
  "dircpy",
@@ -3435,7 +3435,7 @@ dependencies = [
 name = "roc_can"
 version = "0.1.0"
 dependencies = [
- "bitvec 1.0.0",
+ "bitvec 1.0.1",
  "bumpalo",
  "indoc",
  "pretty_assertions",
@@ -3455,7 +3455,7 @@ name = "roc_cli"
 version = "0.1.0"
 dependencies = [
  "bumpalo",
- "clap 3.2.8",
+ "clap 3.2.11",
  "cli_utils",
  "const_format",
  "criterion",
@@ -3515,9 +3515,9 @@ dependencies = [
 name = "roc_collections"
 version = "0.1.0"
 dependencies = [
- "bitvec 1.0.0",
+ "bitvec 1.0.1",
  "bumpalo",
- "hashbrown 0.12.1",
+ "hashbrown 0.12.2",
  "im",
  "im-rc",
  "wyhash",
@@ -3596,7 +3596,7 @@ dependencies = [
 name = "roc_docs_cli"
 version = "0.1.0"
 dependencies = [
- "clap 3.2.8",
+ "clap 3.2.11",
  "roc_docs",
 ]
 
@@ -3725,7 +3725,7 @@ dependencies = [
 name = "roc_gen_wasm"
 version = "0.1.0"
 dependencies = [
- "bitvec 1.0.0",
+ "bitvec 1.0.1",
  "bumpalo",
  "roc_builtins",
  "roc_collections",
@@ -3769,7 +3769,7 @@ version = "0.1.0"
 dependencies = [
  "bincode",
  "bumpalo",
- "clap 3.2.8",
+ "clap 3.2.11",
  "iced-x86",
  "mach_object",
  "memmap2 0.5.4",
@@ -3850,7 +3850,7 @@ name = "roc_mono"
 version = "0.1.0"
 dependencies = [
  "bumpalo",
- "hashbrown 0.12.1",
+ "hashbrown 0.12.2",
  "roc_builtins",
  "roc_can",
  "roc_collections",
@@ -4147,14 +4147,14 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bfa0f585226d2e68097d4f95d113b15b83a82e819ab25717ec0590d9584ef366"
 dependencies = [
- "semver 1.0.11",
+ "semver 1.0.12",
 ]
 
 [[package]]
 name = "rustix"
-version = "0.35.6"
+version = "0.35.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ef258c11e17f5c01979a10543a30a4e12faef6aab217a74266e747eefa3aed88"
+checksum = "d51cc38aa10f6bbb377ed28197aa052aa4e2b762c22be9d3153d01822587e787"
 dependencies = [
  "bitflags",
  "errno",
@@ -4255,9 +4255,9 @@ dependencies = [
 
 [[package]]
 name = "semver"
-version = "1.0.11"
+version = "1.0.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3d92beeab217753479be2f74e54187a6aed4c125ff0703a866c3147a02f0c6dd"
+checksum = "a2333e6df6d6598f2b1974829f853c2b4c5f4a6e503c10af918081aa6f8564e1"
 
 [[package]]
 name = "semver-parser"
@@ -4276,9 +4276,9 @@ dependencies = [
 
 [[package]]
 name = "serde"
-version = "1.0.137"
+version = "1.0.139"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "61ea8d54c77f8315140a05f4c7237403bf38b72704d031543aa1d16abbf517d1"
+checksum = "0171ebb889e45aa68b44aee0859b3eede84c6f5f5c228e6f140c0b2a0a46cad6"
 dependencies = [
  "serde_derive",
 ]
@@ -4316,9 +4316,9 @@ dependencies = [
 
 [[package]]
 name = "serde_derive"
-version = "1.0.137"
+version = "1.0.139"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1f26faba0c3959972377d3b2d306ee9f71faee9714294e41bb777f83f88578be"
+checksum = "dc1d3230c1de7932af58ad8ffbe1d784bd55efd5a9d84ac24f69c72d83543dfb"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -4338,9 +4338,9 @@ dependencies = [
 
 [[package]]
 name = "serde_yaml"
-version = "0.8.24"
+version = "0.8.25"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "707d15895415db6628332b737c838b88c598522e4dc70647e59b72312924aebc"
+checksum = "1ec0091e1f5aa338283ce049bd9dfefd55e1f168ac233e85c1ffe0038fb48cbe"
 dependencies = [
  "indexmap",
  "ryu",
@@ -4526,7 +4526,7 @@ dependencies = [
  "dlib",
  "lazy_static",
  "log",
- "memmap2 0.5.4",
+ "memmap2 0.5.5",
  "nix 0.24.1",
  "pkg-config",
  "wayland-client",
@@ -4987,9 +4987,9 @@ dependencies = [
 
 [[package]]
 name = "tracing-attributes"
-version = "0.1.21"
+version = "0.1.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cc6b8ad3567499f98a1db7a752b07a7c8c7c7c34c332ec00effb2b0027974b7c"
+checksum = "11c75893af559bc8e10716548bdef5cb2b983f8e637db9d0e15126b61b484ee2"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -5036,9 +5036,9 @@ checksum = "dcf81ac59edc17cc8697ff311e8f5ef2d99fcbd9817b34cec66f90b6c3dfd987"
 
 [[package]]
 name = "ucd-trie"
-version = "0.1.3"
+version = "0.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "56dee185309b50d1f11bfedef0fe6d036842e3fb77413abef29f8f8d1c5d4c1c"
+checksum = "89570599c4fe5585de2b388aab47e99f7fa4e9238a1399f707a02e356058141c"
 
 [[package]]
 name = "unicase"
@@ -5220,9 +5220,9 @@ checksum = "6a89911bd99e5f3659ec4acf9c4d93b0a90fe4a2a11f15328472058edc5261be"
 
 [[package]]
 name = "wasm-encoder"
-version = "0.13.0"
+version = "0.14.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "31f0c17267a5ffd6ae3d897589460e21db1673c84fb7016b909c9691369a75ea"
+checksum = "f76068e87fe9b837a6bc2ccded66784173eadb828c4168643e9fddf6f9ed2e61"
 dependencies = [
  "leb128",
 ]
@@ -5368,7 +5368,7 @@ dependencies = [
  "enumset",
  "lazy_static",
  "loupe",
- "memmap2 0.5.4",
+ "memmap2 0.5.5",
  "more-asserts",
  "rustc-demangle",
  "serde",
@@ -5548,9 +5548,9 @@ checksum = "718ed7c55c2add6548cca3ddd6383d738cd73b892df400e96b9aa876f0141d7a"
 
 [[package]]
 name = "wast"
-version = "42.0.0"
+version = "44.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "badcb03f976f983ff0daf294da9697be659442f61e6b0942bb37a2b6cbfe9dd4"
+checksum = "5f474d1b1cb7d92e5360b293f28e8bc9b2d115197a5bbf76bdbfba9161cf9cdc"
 dependencies = [
  "leb128",
  "memchr",
@@ -5560,9 +5560,9 @@ dependencies = [
 
 [[package]]
 name = "wat"
-version = "1.0.44"
+version = "1.0.46"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b92f20b742ac527066c8414bc0637352661b68cab07ef42586cefaba71c965cf"
+checksum = "82d002ce2eca0730c6df2c21719e9c4d8d0cafe74fb0cb8ff137c0774b8e4ed1"
 dependencies = [
  "wast",
 ]

crates/bindgen/src/types.rs

@@ -10,7 +10,7 @@ use roc_collections::VecMap;
 use roc_module::symbol::{Interns, Symbol};
 use roc_mono::layout::{
     cmp_fields, ext_var_is_empty_tag_union, round_up_to_alignment, Builtin, Layout, LayoutCache,
-    UnionLayout,
+    UnionLayout, FieldOrderHash,
 };
 use roc_target::TargetInfo;
 use roc_types::{

examples/interactive/cli-platform/.gitignore

@@ -0,0 +1 @@
+src/glue.rs

examples/interactive/cli-platform/Cargo.lock

@@ -8,19 +8,524 @@ version = "0.7.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8da52d66c7071e2e3fa2a1e5c6d088fec47b593032b254f5e980de8ea54454d6"
 
+[[package]]
+name = "autocfg"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
+
+[[package]]
+name = "base64"
+version = "0.13.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "904dfeac50f3cdaba28fc6f57fdcddb75f49ed61346676a78c4ffe55877802fd"
+
+[[package]]
+name = "bitflags"
+version = "1.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
+
+[[package]]
+name = "bumpalo"
+version = "3.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "37ccbd214614c6783386c1af30caf03192f17891059cecc394b4fb119e363de3"
+
+[[package]]
+name = "bytes"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c4872d67bab6358e59559027aa3b9157c53d9358c51423c17554809a8858e0f8"
+
+[[package]]
+name = "cc"
+version = "1.0.73"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2fff2a6927b3bb87f9595d67196a70493f627687a71d87a0d692242c33f58c11"
+
+[[package]]
+name = "cfg-if"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
+
+[[package]]
+name = "core-foundation"
+version = "0.9.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "194a7a9e6de53fa55116934067c844d9d749312f75c6f6d0980e8c252f8c2146"
+dependencies = [
+ "core-foundation-sys",
+ "libc",
+]
+
+[[package]]
+name = "core-foundation-sys"
+version = "0.8.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5827cebf4670468b8772dd191856768aedcb1b0278a04f989f7766351917b9dc"
+
+[[package]]
+name = "encoding_rs"
+version = "0.8.31"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9852635589dc9f9ea1b6fe9f05b50ef208c85c834a562f0c6abb1c475736ec2b"
+dependencies = [
+ "cfg-if",
+]
+
+[[package]]
+name = "fastrand"
+version = "1.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c3fcf0cee53519c866c09b5de1f6c56ff9d647101f81c1964fa632e148896cdf"
+dependencies = [
+ "instant",
+]
+
+[[package]]
+name = "fnv"
+version = "1.0.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3f9eec918d3f24069decb9af1554cad7c880e2da24a9afd88aca000531ab82c1"
+
+[[package]]
+name = "foreign-types"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f6f339eb8adc052cd2ca78910fda869aefa38d22d5cb648e6485e4d3fc06f3b1"
+dependencies = [
+ "foreign-types-shared",
+]
+
+[[package]]
+name = "foreign-types-shared"
+version = "0.1.1"
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examples/interactive/cli-platform/Cargo.toml

@@ -19,5 +19,6 @@ path = "src/main.rs"
 [dependencies]
 roc_std = { path = "../../../crates/roc_std" }
 libc = "0.2"
+reqwest = "0.11.11"
 
 [workspace]

examples/interactive/cli-platform/src/lib.rs

@@ -4,7 +4,8 @@ use core::alloc::Layout;
 use core::ffi::c_void;
 use core::mem::{ManuallyDrop, MaybeUninit};
 use libc;
-use roc_std::RocStr;
+use reqwest::{Client, ClientBuilder, Request};
+use roc_std::{RocResult, RocList, RocStr};
 use std::ffi::CStr;
 use std::os::raw::c_char;
 
@@ -123,3 +124,65 @@ pub extern "C" fn roc_fx_putLine(line: &RocStr) {
     let string = line.as_str();
     println!("{}", string);
 }
+
+// We just provide just one Client to the Roc program for simplicity, so it must be static in the host.
+// `thread_local!` avoids contention between threads, should that ever arise
+// `lazy_static` & `Mutex` might have easier-to-understand semantics for resources like cookies
+use std::cell::RefCell;
+std::thread_local! {
+    static HTTP_CLIENT: RefCell<Option<Client>> = RefCell::new(None);
+}
+
+struct RocHeader {
+    name: RocStr,
+    value: RocStr,
+}
+
+// This is not the right Rust translation, it's something more complicated...
+enum RocBody {
+    Body(RocStr, RocList<u8>),
+    EmptyBody
+}
+
+#[repr(C)]
+struct RocRequest {
+    method : RocStr,
+    headers : RocList<RocHeader>,
+    url : RocStr,
+    body : RocBody,
+    responseHandler : *const u8, // Response (List U8) -> Result a Error
+    timeout : RocResult<f64, ()>,
+    tracker : RocResult<RocStr, ()>,
+    allowCookiesFromOtherDomains : bool,
+}
+
+#[repr(C)]
+struct RocMetadata {
+    url : RocStr,
+    statusCode : u16,
+    statusText : RocStr,
+    headers : RocList<RocHeader>,
+}
+
+enum RocResponseOfListU8 {
+    BadUrl(RocStr),
+    Timeout,
+    NetworkError,
+    BadStatus(RocMetadata, RocList<u8>),
+    GoodStatus(RocMetadata, RocList<u8>),
+}
+
+#[no_mangle]
+pub extern "C" fn roc_fx_send_request(req: RocRequest) {
+
+    /*
+
+     */
+
+    let rust_body_bytes: Vec<u8> = vec![];
+    let roc_body_bytes = RocList::from_slice(&rust_body_bytes);
+
+    let roc_response: RocResponseOfListU8 = todo!();
+
+    // call_the_closure
+}