diff --git a/Cargo.lock b/Cargo.lock
index 92dac97..53bfc5a 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4,18 +4,18 @@ version = 4
 
 [[package]]
 name = "addr2line"
-version = "0.17.0"
+version = "0.24.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b9ecd88a8c8378ca913a680cd98f0f13ac67383d35993f86c90a70e3f137816b"
+checksum = "dfbe277e56a376000877090da837660b4427aad530e3028d44e0bffe4f89a1c1"
 dependencies = [
  "gimli",
 ]
 
 [[package]]
-name = "adler"
-version = "1.0.2"
+name = "adler2"
+version = "2.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f26201604c87b1e01bd3d98f8d5d9a8fcbb815e8cedb41ffccbeb4bf593a35fe"
+checksum = "512761e0bb2578dd7380c6baaa0f4ce03e84f95e960231d1dec8bf4d7d6e2627"
 
 [[package]]
 name = "aho-corasick"
@@ -34,9 +34,9 @@ checksum = "683d7910e743518b0e34f1186f92494becacb047c7b6bf616c96772180fef923"
 
 [[package]]
 name = "anyhow"
-version = "1.0.54"
+version = "1.0.97"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7a99269dff3bc004caa411f38845c20303f1e393ca2bd6581576fa3a7f59577d"
+checksum = "dcfed56ad506cb2c684a14971b8861fdc3baaaae314b9e5f9bb532cbe3ba7a4f"
 dependencies = [
  "backtrace",
 ]
@@ -60,23 +60,23 @@ dependencies = [
 
 [[package]]
 name = "autocfg"
-version = "1.1.0"
+version = "1.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
+checksum = "ace50bade8e6234aa140d9a2f552bbee1db4d353f69b8217bc503490fc1a9f26"
 
 [[package]]
 name = "backtrace"
-version = "0.3.64"
+version = "0.3.74"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5e121dee8023ce33ab248d9ce1493df03c3b38a659b240096fcbd7048ff9c31f"
+checksum = "8d82cb332cdfaed17ae235a638438ac4d4839913cc2af585c3c6746e8f8bee1a"
 dependencies = [
  "addr2line",
- "cc",
  "cfg-if",
  "libc",
  "miniz_oxide",
  "object",
  "rustc-demangle",
+ "windows-targets",
 ]
 
 [[package]]
@@ -93,9 +93,9 @@ checksum = "5c8214115b7bf84099f1309324e63141d4c5d7cc26862f97a0a857dbefe165bd"
 
 [[package]]
 name = "cc"
-version = "1.2.17"
+version = "1.2.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1fcb57c740ae1daf453ae85f16e37396f672b039e00d9d866e07ddb24e328e3a"
+checksum = "525046617d8376e3db1deffb079e91cef90a89fc3ca5c185bbf8c9ecdd15cd5c"
 dependencies = [
  "shlex",
 ]
@@ -128,19 +128,28 @@ dependencies = [
 
 [[package]]
 name = "clap"
-version = "3.1.0"
+version = "3.2.25"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e5f1fea81f183005ced9e59cdb01737ef2423956dac5a6d731b06b2ecfaa3467"
+checksum = "4ea181bf566f71cb9a5d17a59e1871af638180a18fb0035c92ae62b705207123"
 dependencies = [
  "atty",
  "bitflags 1.3.2",
+ "clap_lex",
  "indexmap",
- "os_str_bytes",
  "strsim",
  "termcolor",
  "textwrap",
 ]
 
+[[package]]
+name = "clap_lex"
+version = "0.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2850f2f5a82cbf437dd5af4d49848fbdfc27c157c3d010345776f952765261c5"
+dependencies = [
+ "os_str_bytes",
+]
+
 [[package]]
 name = "clipboard-win"
 version = "5.4.0"
@@ -164,12 +173,12 @@ checksum = "877a4ace8713b0bcf2a4e7eec82529c029f1d0619886d18145fea96c3ffe5c0f"
 
 [[package]]
 name = "errno"
-version = "0.3.10"
+version = "0.3.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "33d852cb9b869c2a9b3df2f71a3074817f01e1844f839a144f5fcef059a4eb5d"
+checksum = "976dd42dc7e85965fe702eb8164f21f450704bdde31faefd6471dba214cb594e"
 dependencies = [
  "libc",
- "windows-sys 0.59.0",
+ "windows-sys",
 ]
 
 [[package]]
@@ -186,14 +195,14 @@ checksum = "0ce92ff622d6dadf7349484f42c93271a0d49b7cc4d466a936405bacbe10aa78"
 dependencies = [
  "cfg-if",
  "rustix",
- "windows-sys 0.59.0",
+ "windows-sys",
 ]
 
 [[package]]
 name = "filedescriptor"
-version = "0.8.1"
+version = "0.8.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9ed3d8a5e20435ff00469e51a0d82049bae66504b5c429920dadf9bb54d47b3f"
+checksum = "e40758ed24c9b2eeb76c35fb0aebc66c626084edd827e07e1552279814c6682d"
 dependencies = [
  "libc",
  "thiserror",
@@ -207,16 +216,37 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d9c4f5dac5e15c24eb999c26181a6ca40b39fe946cbe4c263c7209467bc83af2"
 
 [[package]]
-name = "gimli"
-version = "0.26.1"
+name = "gc"
+version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "78cc372d058dcf6d5ecd98510e7fbc9e5aec4d21de70f65fea8fecebcd881bd4"
+checksum = "f73a03797d58caede765f4b19522d1a63d737088bbef81de06d2dd117d7bc8c3"
+dependencies = [
+ "gc_derive",
+]
+
+[[package]]
+name = "gc_derive"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fb6f1e0d69658b2806f60864bad1a80a9634fc0bc17f7ed55828e3b9c45bf61e"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 1.0.109",
+ "synstructure",
+]
+
+[[package]]
+name = "gimli"
+version = "0.31.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "07e28edb80900c19c28f1072f2e8aeca7fa06b23cd4169cefe1af5aa3260783f"
 
 [[package]]
 name = "hashbrown"
-version = "0.11.2"
+version = "0.12.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ab5ef0d4909ef3724cc8cce6ccc8572c5c817592e9285f5464f8e86f8bd3726e"
+checksum = "8a9ee70c43aaf417c914396645a0fa852624801b24ebb7ae78fe8272889ac888"
 
 [[package]]
 name = "hashbrown"
@@ -244,17 +274,17 @@ version = "0.5.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "589533453244b0995c858700322199b2becb13b627df2851f64a2775d024abcf"
 dependencies = [
- "windows-sys 0.59.0",
+ "windows-sys",
 ]
 
 [[package]]
 name = "indexmap"
-version = "1.8.0"
+version = "1.9.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "282a6247722caba404c065016bbfa522806e51714c34f5dfc3e4a3a46fcb4223"
+checksum = "bd070e393353796e801d209ad339e89596eb4c8d430d18ede6a1cced8fafbd99"
 dependencies = [
  "autocfg",
- "hashbrown 0.11.2",
+ "hashbrown 0.12.3",
 ]
 
 [[package]]
@@ -283,12 +313,11 @@ checksum = "78ca9ab1a0babb1e7d5695e3530886289c18cf2f87ec19a575a0abdce112e3a3"
 
 [[package]]
 name = "miniz_oxide"
-version = "0.4.4"
+version = "0.8.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a92518e98c078586bc6c934028adcca4c92a53d6a958196de835170a01d84e4b"
+checksum = "ff70ce3e48ae43fa075863cef62e8b43b71a4f2382229920e0df362592919430"
 dependencies = [
- "adler",
- "autocfg",
+ "adler2",
 ]
 
 [[package]]
@@ -320,39 +349,36 @@ checksum = "b8f8bdf33df195859076e54ab11ee78a1b208382d3a26ec40d142ffc1ecc49ef"
 
 [[package]]
 name = "object"
-version = "0.27.1"
+version = "0.36.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "67ac1d3f9a1d3616fd9a60c8d74296f22406a238b6a72f5cc1e6f314df4ffbf9"
+checksum = "62948e14d923ea95ea2c7c86c71013138b66525b86bdc08d2dcc262bdb497b87"
 dependencies = [
  "memchr",
 ]
 
 [[package]]
 name = "os_pipe"
-version = "1.1.4"
+version = "1.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0ae859aa07428ca9a929b936690f8b12dc5f11dd8c6992a18ca93919f28bc177"
+checksum = "5ffd2b0a5634335b135d5728d84c5e0fd726954b87111f7506a61c502280d982"
 dependencies = [
  "libc",
- "windows-sys 0.48.0",
+ "windows-sys",
 ]
 
 [[package]]
 name = "os_str_bytes"
-version = "6.0.0"
+version = "6.6.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8e22443d1643a904602595ba1cd8f7d896afe56d26712531c5ff73a15b2fbf64"
-dependencies = [
- "memchr",
-]
+checksum = "e2355d85b9a3786f481747ced0e0ff2ba35213a1f9bd406ed906554d7af805a1"
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.32"
+version = "1.0.94"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ba508cc11742c0dc5c1659771673afbab7a0efab23aa17e854cbab0837ed0b43"
+checksum = "a31971752e70b8b2686d7e46ec17fb38dad4051d94024c88df49b667caea9c84"
 dependencies = [
- "unicode-xid",
+ "unicode-ident",
 ]
 
 [[package]]
@@ -366,9 +392,9 @@ dependencies = [
 
 [[package]]
 name = "quote"
-version = "1.0.10"
+version = "1.0.40"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "38bc8cc6a5f2e3655e0899c1b848643b2562f853f114bfec7be120678e3ace05"
+checksum = "1885c039570dc00dcb4ff087a89e185fd56bae234ddc7f056a945bf36467248d"
 dependencies = [
  "proc-macro2",
 ]
@@ -385,21 +411,18 @@ dependencies = [
 
 [[package]]
 name = "redox_syscall"
-version = "0.2.10"
+version = "0.2.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8383f39639269cde97d255a32bdb68c047337295414940c68bdd30c2e13203ff"
+checksum = "fb5a58c1855b4b6819d59012155603f0b22ad30cad752600aadfcb695265519a"
 dependencies = [
  "bitflags 1.3.2",
 ]
 
 [[package]]
 name = "redox_termios"
-version = "0.1.2"
+version = "0.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8440d8acb4fd3d277125b4bd01a6f38aee8d814b3b5fc09b3f2b825d37d3fe8f"
-dependencies = [
- "redox_syscall",
-]
+checksum = "20145670ba436b55d91fc92d25e71160fbfbdd57831631c8d7d36377a476f1cb"
 
 [[package]]
 name = "regex-automata"
@@ -420,12 +443,13 @@ checksum = "dbb5fb1acd8a1a18b3dd5be62d25485eb770e05afb408a9627d14d451bae12da"
 
 [[package]]
 name = "rush"
-version = "0.1.0"
+version = "0.2.0"
 dependencies = [
  "anyhow",
  "chumsky",
  "clap",
  "filedescriptor",
+ "gc",
  "os_pipe",
  "rustyline",
  "termion",
@@ -434,9 +458,9 @@ dependencies = [
 
 [[package]]
 name = "rustc-demangle"
-version = "0.1.21"
+version = "0.1.24"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7ef03e0a2b150c7a90d01faf6254c9c48a41e95fb2a8c2ac1c6f0d2b9aefc342"
+checksum = "719b953e2095829ee67db738b3bfa9fa368c94900df327b3f07fe6e794d2fe1f"
 
 [[package]]
 name = "rustix"
@@ -448,7 +472,7 @@ dependencies = [
  "errno",
  "libc",
  "linux-raw-sys",
- "windows-sys 0.59.0",
+ "windows-sys",
 ]
 
 [[package]]
@@ -470,27 +494,27 @@ dependencies = [
  "unicode-segmentation",
  "unicode-width",
  "utf8parse",
- "windows-sys 0.59.0",
+ "windows-sys",
 ]
 
 [[package]]
 name = "serde"
-version = "1.0.136"
+version = "1.0.219"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ce31e24b01e1e524df96f1c2fdd054405f8d7376249a5110886fb4b658484789"
+checksum = "5f0e2c6ed6606019b4e29e69dbaba95b11854410e5347d525002456dbbb786b6"
 dependencies = [
  "serde_derive",
 ]
 
 [[package]]
 name = "serde_derive"
-version = "1.0.136"
+version = "1.0.219"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "08597e7152fcd306f41838ed3e37be9eaeed2b61c42e2117266a554fab4662f9"
+checksum = "5b0276cf7f2c73365f7157c8123c21cd9a50fbbd844757af28ca1f5925fc2a00"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.100",
 ]
 
 [[package]]
@@ -501,9 +525,9 @@ checksum = "0fda2ff0d084019ba4d7c6f371c95d8fd75ce3524c3cb8fb653a3023f6323e64"
 
 [[package]]
 name = "smallvec"
-version = "1.14.0"
+version = "1.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7fcf8323ef1faaee30a44a340193b1ac6814fd9b7b4e88e9d4519a3e4abe1cfd"
+checksum = "8917285742e9f3e1683f0a9c4e6b57960b7314d0b08d30d1ecd426713ee2eee9"
 
 [[package]]
 name = "stacker"
@@ -515,7 +539,7 @@ dependencies = [
  "cfg-if",
  "libc",
  "psm",
- "windows-sys 0.59.0",
+ "windows-sys",
 ]
 
 [[package]]
@@ -526,20 +550,43 @@ checksum = "73473c0e59e6d5812c5dfe2a064a6444949f089e20eec9a2e5506596494e4623"
 
 [[package]]
 name = "syn"
-version = "1.0.82"
+version = "1.0.109"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8daf5dd0bb60cbd4137b1b587d2fc0ae729bc07cf01cd70b36a1ed5ade3b9d59"
+checksum = "72b64191b275b66ffe2469e8af2c1cfe3bafa67b529ead792a6d0160888b4237"
 dependencies = [
  "proc-macro2",
  "quote",
+ "unicode-ident",
+]
+
+[[package]]
+name = "syn"
+version = "2.0.100"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b09a44accad81e1ba1cd74a32461ba89dee89095ba17b32f5d03683b1b1fc2a0"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
+
+[[package]]
+name = "synstructure"
+version = "0.12.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f36bdaa60a83aca3921b5259d5400cbf5e90fc51931376a9bd4a0eb79aa7210f"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 1.0.109",
  "unicode-xid",
 ]
 
 [[package]]
 name = "termcolor"
-version = "1.1.2"
+version = "1.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2dfed899f0eb03f32ee8c6a0aabdb8a7949659e3466561fc0adf54e26d88c5f4"
+checksum = "06794f8f6c5c898b3275aebefa6b8a1cb24cd2c6c79397ab15774837a0bc5755"
 dependencies = [
  "winapi-util",
 ]
@@ -558,28 +605,28 @@ dependencies = [
 
 [[package]]
 name = "textwrap"
-version = "0.14.2"
+version = "0.16.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0066c8d12af8b5acd21e00547c3797fde4e8677254a7ee429176ccebbe93dd80"
+checksum = "c13547615a44dc9c452a8a534638acdf07120d4b6847c8178705da06306a3057"
 
 [[package]]
 name = "thiserror"
-version = "1.0.30"
+version = "1.0.69"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "854babe52e4df1653706b98fcfc05843010039b406875930a70e4d9644e5c417"
+checksum = "b6aaf5339b578ea85b50e080feb250a3e8ae8cfcdff9a461c9ec2904bc923f52"
 dependencies = [
  "thiserror-impl",
 ]
 
 [[package]]
 name = "thiserror-impl"
-version = "1.0.30"
+version = "1.0.69"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "aa32fd3f627f367fe16f893e2597ae3c05020f8bba2666a4e6ea73d377e5714b"
+checksum = "4fee6c4efc90059e10f81e6d42c60a18f76588c3d74cb83a0b242a2b6c7504c1"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.100",
 ]
 
 [[package]]
@@ -602,9 +649,9 @@ checksum = "1fc81956842c57dac11422a97c3b8195a1ff727f06e85c84ed2e8aa277c9a0fd"
 
 [[package]]
 name = "unicode-xid"
-version = "0.2.2"
+version = "0.2.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8ccb82d61f80a663efe1f787a51b16b5a51e3314d6ac365b08639f52387b33f3"
+checksum = "ebc1c04c71510c7f702b52b7c350734c9ff1295c464a03335b00bb84fc54f853"
 
 [[package]]
 name = "utf8-chars"
@@ -639,11 +686,11 @@ checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
 
 [[package]]
 name = "winapi-util"
-version = "0.1.5"
+version = "0.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "70ec6ce85bb158151cae5e5c87f95a8e97d2c0c4b001223f33a334e3ce5de178"
+checksum = "cf221c93e13a30d793f7645a0e7762c55d169dbb0a49671918a2319d289b10bb"
 dependencies = [
- "winapi",
+ "windows-sys",
 ]
 
 [[package]]
@@ -652,37 +699,13 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
 
-[[package]]
-name = "windows-sys"
-version = "0.48.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "677d2418bec65e3338edb076e806bc1ec15693c5d0104683f2efe857f61056a9"
-dependencies = [
- "windows-targets 0.48.1",
-]
-
 [[package]]
 name = "windows-sys"
 version = "0.59.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1e38bc4d79ed67fd075bcc251a1c39b32a1776bbe92e5bef1f0bf1f8c531853b"
 dependencies = [
- "windows-targets 0.52.6",
-]
-
-[[package]]
-name = "windows-targets"
-version = "0.48.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "05d4b17490f70499f20b9e791dcf6a299785ce8af4d709018206dc5b4953e95f"
-dependencies = [
- "windows_aarch64_gnullvm 0.48.0",
- "windows_aarch64_msvc 0.48.0",
- "windows_i686_gnu 0.48.0",
- "windows_i686_msvc 0.48.0",
- "windows_x86_64_gnu 0.48.0",
- "windows_x86_64_gnullvm 0.48.0",
- "windows_x86_64_msvc 0.48.0",
+ "windows-targets",
 ]
 
 [[package]]
@@ -691,46 +714,28 @@ version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9b724f72796e036ab90c1021d4780d4d3d648aca59e491e6b98e725b84e99973"
 dependencies = [
- "windows_aarch64_gnullvm 0.52.6",
- "windows_aarch64_msvc 0.52.6",
- "windows_i686_gnu 0.52.6",
+ "windows_aarch64_gnullvm",
+ "windows_aarch64_msvc",
+ "windows_i686_gnu",
  "windows_i686_gnullvm",
- "windows_i686_msvc 0.52.6",
- "windows_x86_64_gnu 0.52.6",
- "windows_x86_64_gnullvm 0.52.6",
- "windows_x86_64_msvc 0.52.6",
+ "windows_i686_msvc",
+ "windows_x86_64_gnu",
+ "windows_x86_64_gnullvm",
+ "windows_x86_64_msvc",
 ]
 
-[[package]]
-name = "windows_aarch64_gnullvm"
-version = "0.48.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "91ae572e1b79dba883e0d315474df7305d12f569b400fcf90581b06062f7e1bc"
-
 [[package]]
 name = "windows_aarch64_gnullvm"
 version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "32a4622180e7a0ec044bb555404c800bc9fd9ec262ec147edd5989ccd0c02cd3"
 
-[[package]]
-name = "windows_aarch64_msvc"
-version = "0.48.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b2ef27e0d7bdfcfc7b868b317c1d32c641a6fe4629c171b8928c7b08d98d7cf3"
-
 [[package]]
 name = "windows_aarch64_msvc"
 version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "09ec2a7bb152e2252b53fa7803150007879548bc709c039df7627cabbd05d469"
 
-[[package]]
-name = "windows_i686_gnu"
-version = "0.48.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "622a1962a7db830d6fd0a69683c80a18fda201879f0f447f065a3b7467daa241"
-
 [[package]]
 name = "windows_i686_gnu"
 version = "0.52.6"
@@ -743,48 +748,24 @@ version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0eee52d38c090b3caa76c563b86c3a4bd71ef1a819287c19d586d7334ae8ed66"
 
-[[package]]
-name = "windows_i686_msvc"
-version = "0.48.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4542c6e364ce21bf45d69fdd2a8e455fa38d316158cfd43b3ac1c5b1b19f8e00"
-
 [[package]]
 name = "windows_i686_msvc"
 version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "240948bc05c5e7c6dabba28bf89d89ffce3e303022809e73deaefe4f6ec56c66"
 
-[[package]]
-name = "windows_x86_64_gnu"
-version = "0.48.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ca2b8a661f7628cbd23440e50b05d705db3686f894fc9580820623656af974b1"
-
 [[package]]
 name = "windows_x86_64_gnu"
 version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "147a5c80aabfbf0c7d901cb5895d1de30ef2907eb21fbbab29ca94c5b08b1a78"
 
-[[package]]
-name = "windows_x86_64_gnullvm"
-version = "0.48.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7896dbc1f41e08872e9d5e8f8baa8fdd2677f29468c4e156210174edc7f7b953"
-
 [[package]]
 name = "windows_x86_64_gnullvm"
 version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "24d5b23dc417412679681396f2b49f3de8c1473deb516bd34410872eff51ed0d"
 
-[[package]]
-name = "windows_x86_64_msvc"
-version = "0.48.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1a515f5799fe4961cb532f983ce2b23082366b898e52ffbce459c86f67c8378a"
-
 [[package]]
 name = "windows_x86_64_msvc"
 version = "0.52.6"
diff --git a/Cargo.toml b/Cargo.toml
index 6595b16..ace96db 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,12 +1,10 @@
 [package]
 name = "rush"
-version = "0.1.0"
+version = "0.2.0"
 authors = ["Daniel Bulant <danbulant@gmail.com>"]
 edition = "2021"
 description = "A simple rust shell"
 
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
-
 [dependencies]
 utf8-chars = "1.0.0"
 termion = "1.5.6"
@@ -15,6 +13,7 @@ clap = "3.1.0"
 os_pipe = "1.1.4"
 chumsky = "0.10.0"
 rustyline = "15.0.0"
+gc = { version = "0.5", features = ["derive"] }
 
 [dependencies.anyhow]
 version = "1.0.54"
diff --git a/src/executor.rs b/src/executor.rs
new file mode 100644
index 0000000..cd87a08
--- /dev/null
+++ b/src/executor.rs
@@ -0,0 +1,127 @@
+use std::{collections::HashMap, fmt::Debug, sync::Mutex};
+
+use anyhow::Result;
+use gc::{Gc, GcCell, Trace, Finalize};
+
+use crate::parser::{And, Command, CommandPipe, For, FormatString, FormatStringPart, FunctionDefinition, If, Index, Loop, Not, Or, Primitive, Set, SourceFilePipe, Statement, TargetFilePipe, Value, While};
+
+#[derive(Clone, Debug, PartialEq, Trace, Finalize)]
+pub enum Type {
+    Number(i64),
+    String(String),
+    Void,
+    Heap(HeapCell)
+}
+
+impl Type {
+    fn heap(t: HeapType) -> Self {
+        Type::Heap(HeapCell::new(t))
+    }
+}
+
+#[derive(Clone, Debug, Trace, Finalize)]
+pub struct HeapCell(Gc<GcCell<HeapType>>);
+
+impl HeapCell {
+    fn new(t: HeapType) -> Self {
+        Self(Gc::new(GcCell::new(t)))
+    }
+}
+
+impl PartialEq for HeapCell {
+    fn eq(&self, other: &Self) -> bool {
+        Gc::ptr_eq(&self.0, &other.0)
+    }
+}
+
+#[derive(Debug, Trace, Finalize)]
+pub enum HeapType {
+    Function(Function),
+    Array(Vec<Type>),
+    Object(HashMap<String, Type>),
+}
+
+#[derive(Default)]
+pub struct Context {
+    scopes: Vec<Gc<GcCell<HashMap<String, Type>>>>,
+    returning: Option<Type>
+}
+
+#[derive(Debug, Trace, Finalize)]
+enum Function {
+    Native(NativeFunction),
+    UserDefined(UserFunction)
+}
+
+#[derive(Trace, Finalize)]
+struct NativeFunction {
+    name: String,
+    #[unsafe_ignore_trace]
+    body: Mutex<Box<dyn Fn(Vec<Type>) -> Type>>
+}
+
+#[derive(Trace, Finalize)]
+struct UserFunction {
+    #[unsafe_ignore_trace]
+    def: Box<FunctionDefinition>,
+    /// captured scopes to allow referencing variables in callbacks
+    scopes: Vec<Gc<GcCell<HashMap<String, Type>>>>,
+}
+
+impl Debug for NativeFunction {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        f.debug_struct("NativeFunction")
+            .field("name", &self.name)
+            .finish()
+    }
+}
+
+impl Debug for UserFunction {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        self.def.fmt(f)
+    }
+}
+
+trait GetValue {
+    fn get(&mut self, context: &mut Context) -> Result<Type>;
+}
+
+trait Exec {}
+
+impl GetValue for Value {
+    fn get(&mut self, context: &mut Context) -> Result<Type> {
+        match self {
+            Value::Primitive(p) => p.get(context),
+            _ => Err(anyhow::anyhow!("Not implemented yet"))
+        }
+    }
+}
+impl GetValue for Primitive {
+    fn get(&mut self, context: &mut Context) -> Result<Type> {
+        match self {
+            Primitive::Number(n) => Ok(Type::Number(*n)),
+            Primitive::FormatString(s) => s.get(context),
+            Primitive::Index(i) => i.get(context),
+        }
+    }
+}
+impl GetValue for FormatString {}
+impl GetValue for FormatStringPart {}
+impl GetValue for Index {}
+
+impl Exec for Statement {}
+impl Exec for Command {}
+impl Exec for Set {}
+impl Exec for For {}
+impl Exec for While {}
+impl Exec for If {}
+impl Exec for Loop {}
+impl Exec for Or {}
+impl Exec for And {}
+impl Exec for Not {}
+impl Exec for CommandPipe {}
+impl Exec for TargetFilePipe {}
+impl Exec for SourceFilePipe {}
+impl Exec for FunctionDefinition {}
+impl Exec for UserFunction {}
+impl Exec for NativeFunction {}
\ No newline at end of file
diff --git a/src/main.rs b/src/main.rs
index 0650261..92d330a 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,7 +1,8 @@
 use std::io::Read;
 use chumsky::Parser;
 
-mod parser;
+pub mod parser;
+pub mod executor;
 
 fn main() {
     let mut file = std::fs::File::open("./test/parsetest.rush").expect("Unable to open file");
@@ -10,5 +11,17 @@ fn main() {
 
     dbg!(&string);
 
-    println!("{:?}", parser::parse().parse(&string));
+    let parsed = parser::parse().parse(&string);
+
+    println!("{:?}",parsed);
+
+    if parsed.has_errors() {
+        println!("Parsing failed");
+        for error in parsed.errors() {
+            println!("{:?}", error);
+        }
+        return;
+    } else {
+        println!("Parsing succeeded");
+    }
 }
\ No newline at end of file
diff --git a/src/parser.rs b/src/parser.rs
index 1a64753..22408e7 100644
--- a/src/parser.rs
+++ b/src/parser.rs
@@ -107,7 +107,7 @@ pub struct Loop {
 }
 
 #[derive(Debug, Clone)]
-pub struct Function {
+pub struct FunctionDefinition {
     name: String,
     args: Vec<Bindable>,
     body: Vec<Statement>
@@ -121,7 +121,7 @@ pub enum Statement {
     While(While),
     If(If),
     Loop(Loop),
-    Function(Function),
+    Function(FunctionDefinition),
     Return(Option<Value>),
     Break,
     Continue,
@@ -140,7 +140,6 @@ pub enum Value {
 }
 
 pub fn parse<'a>() -> impl Parser<'a, &'a str, Vec<Statement>, chumsky::extra::Default> {
-    // let ident = text::ident::<&'a str, chumsky::extra::Default>();
     let digits = text::digits(10).to_slice();
 
     let frac = just('.').then(digits);
@@ -158,7 +157,6 @@ pub fn parse<'a>() -> impl Parser<'a, &'a str, Vec<Statement>, chumsky::extra::D
         .to_slice()
         .map(|s: &str| s.parse().unwrap())
         .boxed();
-    // let op = |c| just(c).padded();
 
     let escape = just('\\')
         .then(choice((
@@ -402,7 +400,7 @@ pub fn parse<'a>() -> impl Parser<'a, &'a str, Vec<Statement>, chumsky::extra::D
             .then(bindable_group.clone())
             .then(block.clone().padded_by(text::inline_whitespace()))
             .map(|((name, args), body): ((&str, Vec<Bindable>), Vec<Statement>)| {
-                Function {
+                FunctionDefinition {
                     name: name.to_string(),
                     args: args,
                     body
diff --git a/test/parsetest.rush b/test/parsetest.rush
index ac0edec..ff39838 100644
--- a/test/parsetest.rush
+++ b/test/parsetest.rush
@@ -1 +1 @@
-! test
\ No newline at end of file
+echo test
\ No newline at end of file