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+checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
+
+[[package]]
+name = "winapi-util"
+version = "0.1.5"
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+checksum = "70ec6ce85bb158151cae5e5c87f95a8e97d2c0c4b001223f33a334e3ce5de178"
+dependencies = [
+ "winapi",
+]
+
+[[package]]
+name = "winapi-x86_64-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
+
+[[package]]
+name = "windows-sys"
+version = "0.34.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5acdd78cb4ba54c0045ac14f62d8f94a03d10047904ae2a40afa1e99d8f70825"
+dependencies = [
+ "windows_aarch64_msvc",
+ "windows_i686_gnu",
+ "windows_i686_msvc",
+ "windows_x86_64_gnu",
+ "windows_x86_64_msvc",
+]
+
+[[package]]
+name = "windows_aarch64_msvc"
+version = "0.34.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "17cffbe740121affb56fad0fc0e421804adf0ae00891205213b5cecd30db881d"
+
+[[package]]
+name = "windows_i686_gnu"
+version = "0.34.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2564fde759adb79129d9b4f54be42b32c89970c18ebf93124ca8870a498688ed"
+
+[[package]]
+name = "windows_i686_msvc"
+version = "0.34.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9cd9d32ba70453522332c14d38814bceeb747d80b3958676007acadd7e166956"
+
+[[package]]
+name = "windows_x86_64_gnu"
+version = "0.34.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cfce6deae227ee8d356d19effc141a509cc503dfd1f850622ec4b0f84428e1f4"
+
+[[package]]
+name = "windows_x86_64_msvc"
+version = "0.34.0"
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+checksum = "d19538ccc21819d01deaf88d6a17eae6596a12e9aafdbb97916fb49896d89de9"
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..8bc4c25
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,12 @@
+[package]
+name = "e0"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+anyhow = "1.0.56"
+clap = { version = "3.1.8", features = ["derive"] }
+lalrpop-util = { version = "0.19.7", features = ["lexer"] }
+
+[build-dependencies]
+lalrpop = "0.19.7"
diff --git a/Justfile b/Justfile
deleted file mode 100644
index dbe3309..0000000
--- a/Justfile
+++ /dev/null
@@ -1,6 +0,0 @@
-example:
- dune build
- dune exec e0 < examples/basic.e0
-
-fmt:
- fd -e ml | xargs ocamlformat -i
diff --git a/LICENSE.md b/LICENSE.md
deleted file mode 100644
index 2fb2e74..0000000
--- a/LICENSE.md
+++ /dev/null
@@ -1,675 +0,0 @@
-### GNU GENERAL PUBLIC LICENSE
-
-Version 3, 29 June 2007
-
-Copyright (C) 2007 Free Software Foundation, Inc.
-
-
-Everyone is permitted to copy and distribute verbatim copies of this
-license document, but changing it is not allowed.
-
-### Preamble
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-also to any other work released this way by its authors. You can apply
-it to your programs, too.
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-When we speak of free software, we are referring to freedom, not
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-The precise terms and conditions for copying, distribution and
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-### TERMS AND CONDITIONS
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-"This License" refers to version 3 of the GNU General Public License.
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-"Copyright" also means copyright-like laws that apply to other kinds
-of works, such as semiconductor masks.
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-"The Program" refers to any copyrightable work licensed under this
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-#### 1. Source Code.
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-- a) The work must carry prominent notices stating that you modified
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-- c) You must license the entire work, as a whole, under this
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-#### 11. Patents.
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-
-A patent license is "discriminatory" if it does not include within the
-scope of its coverage, prohibits the exercise of, or is conditioned on
-the non-exercise of one or more of the rights that are specifically
-granted under this License. You may not convey a covered work if you
-are a party to an arrangement with a third party that is in the
-business of distributing software, under which you make payment to the
-third party based on the extent of your activity of conveying the
-work, and under which the third party grants, to any of the parties
-who would receive the covered work from you, a discriminatory patent
-license (a) in connection with copies of the covered work conveyed by
-you (or copies made from those copies), or (b) primarily for and in
-connection with specific products or compilations that contain the
-covered work, unless you entered into that arrangement, or that patent
-license was granted, prior to 28 March 2007.
-
-Nothing in this License shall be construed as excluding or limiting
-any implied license or other defenses to infringement that may
-otherwise be available to you under applicable patent law.
-
-#### 12. No Surrender of Others' Freedom.
-
-If conditions are imposed on you (whether by court order, agreement or
-otherwise) that contradict the conditions of this License, they do not
-excuse you from the conditions of this License. If you cannot convey a
-covered work so as to satisfy simultaneously your obligations under
-this License and any other pertinent obligations, then as a
-consequence you may not convey it at all. For example, if you agree to
-terms that obligate you to collect a royalty for further conveying
-from those to whom you convey the Program, the only way you could
-satisfy both those terms and this License would be to refrain entirely
-from conveying the Program.
-
-#### 13. Use with the GNU Affero General Public License.
-
-Notwithstanding any other provision of this License, you have
-permission to link or combine any covered work with a work licensed
-under version 3 of the GNU Affero General Public License into a single
-combined work, and to convey the resulting work. The terms of this
-License will continue to apply to the part which is the covered work,
-but the special requirements of the GNU Affero General Public License,
-section 13, concerning interaction through a network will apply to the
-combination as such.
-
-#### 14. Revised Versions of this License.
-
-The Free Software Foundation may publish revised and/or new versions
-of the GNU General Public License from time to time. Such new versions
-will be similar in spirit to the present version, but may differ in
-detail to address new problems or concerns.
-
-Each version is given a distinguishing version number. If the Program
-specifies that a certain numbered version of the GNU General Public
-License "or any later version" applies to it, you have the option of
-following the terms and conditions either of that numbered version or
-of any later version published by the Free Software Foundation. If the
-Program does not specify a version number of the GNU General Public
-License, you may choose any version ever published by the Free
-Software Foundation.
-
-If the Program specifies that a proxy can decide which future versions
-of the GNU General Public License can be used, that proxy's public
-statement of acceptance of a version permanently authorizes you to
-choose that version for the Program.
-
-Later license versions may give you additional or different
-permissions. However, no additional obligations are imposed on any
-author or copyright holder as a result of your choosing to follow a
-later version.
-
-#### 15. Disclaimer of Warranty.
-
-THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
-APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
-HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT
-WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND
-PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE
-DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR
-CORRECTION.
-
-#### 16. Limitation of Liability.
-
-IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
-WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR
-CONVEYS THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
-INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES
-ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT
-NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR
-LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM
-TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER
-PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
-
-#### 17. Interpretation of Sections 15 and 16.
-
-If the disclaimer of warranty and limitation of liability provided
-above cannot be given local legal effect according to their terms,
-reviewing courts shall apply local law that most closely approximates
-an absolute waiver of all civil liability in connection with the
-Program, unless a warranty or assumption of liability accompanies a
-copy of the Program in return for a fee.
-
-END OF TERMS AND CONDITIONS
-
-### How to Apply These Terms to Your New Programs
-
-If you develop a new program, and you want it to be of the greatest
-possible use to the public, the best way to achieve this is to make it
-free software which everyone can redistribute and change under these
-terms.
-
-To do so, attach the following notices to the program. It is safest to
-attach them to the start of each source file to most effectively state
-the exclusion of warranty; and each file should have at least the
-"copyright" line and a pointer to where the full notice is found.
-
-
- Copyright (C)
-
- This program is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program. If not, see .
-
-Also add information on how to contact you by electronic and paper
-mail.
-
-If the program does terminal interaction, make it output a short
-notice like this when it starts in an interactive mode:
-
- Copyright (C)
- This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
- This is free software, and you are welcome to redistribute it
- under certain conditions; type `show c' for details.
-
-The hypothetical commands \`show w' and \`show c' should show the
-appropriate parts of the General Public License. Of course, your
-program's commands might be different; for a GUI interface, you would
-use an "about box".
-
-You should also get your employer (if you work as a programmer) or
-school, if any, to sign a "copyright disclaimer" for the program, if
-necessary. For more information on this, and how to apply and follow
-the GNU GPL, see .
-
-The GNU General Public License does not permit incorporating your
-program into proprietary programs. If your program is a subroutine
-library, you may consider it more useful to permit linking proprietary
-applications with the library. If this is what you want to do, use the
-GNU Lesser General Public License instead of this License. But first,
-please read .
diff --git a/bin/dune b/bin/dune
deleted file mode 100644
index c604479..0000000
--- a/bin/dune
+++ /dev/null
@@ -1,4 +0,0 @@
-(executable
- (public_name e0)
- (name main)
- (libraries e0))
diff --git a/bin/main.ml b/bin/main.ml
deleted file mode 100644
index b130177..0000000
--- a/bin/main.ml
+++ /dev/null
@@ -1,12 +0,0 @@
-open E0
-
-let () =
- let p = Lexing.from_channel stdin |> Parse.try_parse in
- match p with
- | Error msg -> Printf.eprintf "Could not load program: %s" msg
- | Ok p ->
- let decl_map = Typeck.get_decl_map p in
- Hashtbl.iter
- (fun name ty -> Printf.eprintf " %s : %s\n" name (Ast.show_ty ty))
- decl_map;
- Ast.show_program p |> print_endline
diff --git a/build.rs b/build.rs
new file mode 100644
index 0000000..ca5c283
--- /dev/null
+++ b/build.rs
@@ -0,0 +1,3 @@
+fn main() {
+ lalrpop::process_root().unwrap();
+}
diff --git a/dune-project b/dune-project
deleted file mode 100644
index 55583e8..0000000
--- a/dune-project
+++ /dev/null
@@ -1,22 +0,0 @@
-(lang dune 3.0)
-
-(name e0)
-
-(generate_opam_files true)
-
-(source
- (uri https://git.sr.ht/~mzhang/e0))
-
-(authors "Michael Zhang")
-
-(license LICENSE.md)
-
-(documentation https://git.sr.ht/~mzhang/e0)
-
-(package
- (name e0)
- (synopsis "Simple programming language")
- (description "A longer description")
- (depends ocaml dune))
-
-(using menhir 2.1)
diff --git a/e0.opam b/e0.opam
deleted file mode 100644
index 9979807..0000000
--- a/e0.opam
+++ /dev/null
@@ -1,27 +0,0 @@
-# This file is generated by dune, edit dune-project instead
-opam-version: "2.0"
-synopsis: "Simple programming language"
-description: "A longer description"
-authors: ["Michael Zhang"]
-license: "LICENSE.md"
-doc: "https://git.sr.ht/~mzhang/e0"
-depends: [
- "ocaml"
- "dune" {>= "3.0"}
- "odoc" {with-doc}
-]
-build: [
- ["dune" "subst"] {dev}
- [
- "dune"
- "build"
- "-p"
- name
- "-j"
- jobs
- "@install"
- "@runtest" {with-test}
- "@doc" {with-doc}
- ]
-]
-dev-repo: "https://git.sr.ht/~mzhang/e0"
diff --git a/examples/basic.e0 b/examples/basic.e0
index f39e62b..9998b85 100644
--- a/examples/basic.e0
+++ b/examples/basic.e0
@@ -1,5 +1,3 @@
-extern fn printf();
-
-fn main() {
+fn main() -> int {
return 42;
}
diff --git a/lib/ast.ml b/lib/ast.ml
deleted file mode 100644
index 88461bd..0000000
--- a/lib/ast.ml
+++ /dev/null
@@ -1,28 +0,0 @@
-type op = OpAdd | OpSub | OpMul | OpDiv [@@deriving show]
-
-type lit = LitInt of int | LitNegInt of int | LitFloat of float
-[@@deriving show]
-
-type ty =
- | TyUnit
- | TySizedInt
- | TyGenericInt
- | TyFunc of ty list * ty
- | TyPointer of ty
- | TyStruct of (string * ty) list
-[@@deriving show]
-
-type expr =
- | ExprUnit
- | ExprLit of lit
- | ExprBin of expr * op * expr
- | ExprAnnot of expr * ty
-[@@deriving show]
-
-type pat = PatName of string [@@deriving show]
-type stmt = StmtLet of pat * expr | StmtReturn of expr [@@deriving show]
-type block = { stmts : stmt list; ret : expr } [@@deriving show]
-type func = { name : string; body : block } [@@deriving show]
-type extern_func = { name : string } [@@deriving show]
-type decl = DeclFunc of func | DeclExternFunc of extern_func [@@deriving show]
-type program = decl list [@@deriving show]
diff --git a/lib/dune b/lib/dune
deleted file mode 100644
index eea4cfb..0000000
--- a/lib/dune
+++ /dev/null
@@ -1,21 +0,0 @@
-(library
- (name e0)
- (libraries menhirLib)
- (preprocess
- (pps ppx_deriving.show ppx_deriving.ord)))
-
-(ocamllex lexer)
-
-(menhir
- (flags --table)
- (modules parser))
-
-; https://baturin.org/blog/declarative-parse-error-reporting-with-menhir/
-
-(rule
- (targets parser_messages.ml)
- (deps parser.messages parser.mly)
- (action
- (with-stdout-to
- %{targets}
- (run menhir --compile-errors %{deps}))))
diff --git a/lib/ir.ml b/lib/ir.ml
deleted file mode 100644
index 5f73fb6..0000000
--- a/lib/ir.ml
+++ /dev/null
@@ -1,3 +0,0 @@
-type irexpr = IExpr
-type global = Global
-type program = { globals : global list }
diff --git a/lib/lexer.mll b/lib/lexer.mll
deleted file mode 100644
index 4429e2c..0000000
--- a/lib/lexer.mll
+++ /dev/null
@@ -1,22 +0,0 @@
-{ open Parser }
-
-rule f = parse
-| '\n' { Lexing.new_line lexbuf; f lexbuf }
-| [' ' '\t'] { f lexbuf }
-
-| "extern" { KWD_EXTERN }
-| "fn" { KWD_FN }
-| "return" { KWD_RETURN }
-
-| "(" { PUNCT_LPAREN }
-| ")" { PUNCT_RPAREN }
-| "->" { PUNCT_RARROW }
-| ":" { PUNCT_COLON }
-| ";" { PUNCT_SEMI }
-| "{" { PUNCT_LBRACE }
-| "}" { PUNCT_RBRACE }
-
-| "-" ['0'-'9']+ as i { LIT_NEG_INT (- (int_of_string i)) }
-| ['0'-'9']+ as i { LIT_INT (int_of_string i) }
-| ['a'-'z' 'A'-'Z']* as i { IDENT i }
-| eof { EOF }
diff --git a/lib/lowering.ml b/lib/lowering.ml
deleted file mode 100644
index be3f4aa..0000000
--- a/lib/lowering.ml
+++ /dev/null
@@ -1,9 +0,0 @@
-open Ast
-open Ir
-
-(* Processing state for this particular scope *)
-type state = { parent : state option }
-
-let lower (func : func) : (irexpr list, unit) result =
- let { name = _; body = _ } = func in
- Error ()
diff --git a/lib/parse.ml b/lib/parse.ml
deleted file mode 100644
index bf4a64c..0000000
--- a/lib/parse.ml
+++ /dev/null
@@ -1,39 +0,0 @@
-open Util
-module I = Parser.MenhirInterpreter
-
-let get_parse_error env =
- match I.stack env with
- | (lazy Nil) -> "Invalid syntax"
- | (lazy (Cons (I.Element (state, _, _, _), _))) -> (
- try Parser_messages.message (I.number state)
- with Not_found -> "invalid syntax (no specific message for this eror)")
-
-let rec parse lexbuf (checkpoint : Ast.program I.checkpoint) =
- match checkpoint with
- | I.InputNeeded _env ->
- let token = Lexer.f lexbuf in
- let startp = lexbuf.lex_start_p and endp = lexbuf.lex_curr_p in
- let checkpoint = I.offer checkpoint (token, startp, endp) in
- parse lexbuf checkpoint
- | I.Shifting _ | I.AboutToReduce _ ->
- let checkpoint = I.resume checkpoint in
- parse lexbuf checkpoint
- | I.HandlingError _env ->
- let line, pos = Util.get_lexing_position lexbuf in
- let err = get_parse_error _env in
- raise (Syntax_error (Some (line, pos), err))
- | I.Accepted v -> v
- | I.Rejected ->
- raise (Syntax_error (None, "invalid syntax (parser rejected the input)"))
-
-let try_parse lexbuf =
- try
- let program = parse lexbuf (Parser.Incremental.program lexbuf.lex_curr_p) in
- Ok program
- with Util.Syntax_error (pos, err) -> (
- match pos with
- | Some (line, pos) ->
- Error
- (Printf.sprintf "Syntax error on line %d, character %d: %s" line pos
- err)
- | None -> Error (Printf.sprintf "Syntax error: %s" err))
diff --git a/lib/parser.messages b/lib/parser.messages
deleted file mode 100644
index a06c15f..0000000
--- a/lib/parser.messages
+++ /dev/null
@@ -1,108 +0,0 @@
-program: PUNCT_RPAREN
-##
-## Ends in an error in state: 0.
-##
-## program' -> . program [ # ]
-##
-## The known suffix of the stack is as follows:
-##
-##
-
-
-
-program: KWD_FN PUNCT_RPAREN
-##
-## Ends in an error in state: 1.
-##
-## func -> KWD_FN . IDENT PUNCT_LPAREN PUNCT_RPAREN body [ KWD_FN # ]
-##
-## The known suffix of the stack is as follows:
-## KWD_FN
-##
-
-
-
-program: KWD_FN IDENT PUNCT_RPAREN
-##
-## Ends in an error in state: 2.
-##
-## func -> KWD_FN IDENT . PUNCT_LPAREN PUNCT_RPAREN body [ KWD_FN # ]
-##
-## The known suffix of the stack is as follows:
-## KWD_FN IDENT
-##
-
-
-
-program: KWD_FN IDENT PUNCT_LPAREN PUNCT_RBRACE
-##
-## Ends in an error in state: 3.
-##
-## func -> KWD_FN IDENT PUNCT_LPAREN . PUNCT_RPAREN body [ KWD_FN # ]
-##
-## The known suffix of the stack is as follows:
-## KWD_FN IDENT PUNCT_LPAREN
-##
-
-
-
-program: KWD_FN IDENT PUNCT_LPAREN PUNCT_RPAREN PUNCT_RPAREN
-##
-## Ends in an error in state: 4.
-##
-## func -> KWD_FN IDENT PUNCT_LPAREN PUNCT_RPAREN . body [ KWD_FN # ]
-##
-## The known suffix of the stack is as follows:
-## KWD_FN IDENT PUNCT_LPAREN PUNCT_RPAREN
-##
-
-
-
-program: KWD_FN IDENT PUNCT_LPAREN PUNCT_RPAREN PUNCT_LBRACE PUNCT_RPAREN
-##
-## Ends in an error in state: 5.
-##
-## body -> PUNCT_LBRACE . list(stmt) PUNCT_RBRACE [ KWD_FN # ]
-##
-## The known suffix of the stack is as follows:
-## PUNCT_LBRACE
-##
-
-
-
-program: KWD_FN IDENT PUNCT_LPAREN PUNCT_RPAREN PUNCT_LBRACE KWD_RETURN PUNCT_RPAREN
-##
-## Ends in an error in state: 6.
-##
-## stmt -> KWD_RETURN . expr [ PUNCT_RBRACE KWD_RETURN ]
-##
-## The known suffix of the stack is as follows:
-## KWD_RETURN
-##
-
-
-
-program: KWD_FN IDENT PUNCT_LPAREN PUNCT_RPAREN PUNCT_LBRACE KWD_RETURN LIT_NEG_INT PUNCT_RPAREN
-##
-## Ends in an error in state: 9.
-##
-## list(stmt) -> stmt . list(stmt) [ PUNCT_RBRACE ]
-##
-## The known suffix of the stack is as follows:
-## stmt
-##
-
-
-
-program: KWD_FN IDENT PUNCT_LPAREN PUNCT_RPAREN PUNCT_LBRACE PUNCT_RBRACE PUNCT_RPAREN
-##
-## Ends in an error in state: 17.
-##
-## list(decl) -> decl . list(decl) [ # ]
-##
-## The known suffix of the stack is as follows:
-## decl
-##
-
-
-
diff --git a/lib/parser.mly b/lib/parser.mly
deleted file mode 100644
index 1aff965..0000000
--- a/lib/parser.mly
+++ /dev/null
@@ -1,48 +0,0 @@
-%{
- open Ast
-%}
-
-%token EOF
-
-%token KWD_EXTERN
-%token KWD_FN
-%token KWD_RETURN
-
-%token PUNCT_COLON
-%token PUNCT_LBRACE
-%token PUNCT_LPAREN
-%token PUNCT_RARROW
-%token PUNCT_RBRACE
-%token PUNCT_RPAREN
-%token PUNCT_SEMI
-
-%token LIT_NEG_INT
-%token LIT_INT
-%token IDENT
-
-%start program
-
-%%
-
-program:
-| decls=decl* EOF { decls }
-
-decl:
-| func=func { DeclFunc func }
-| extern=extern_func { DeclExternFunc extern }
-
-func:
-| KWD_FN name=IDENT PUNCT_LPAREN PUNCT_RPAREN body=body { { name; body } }
-
-extern_func:
-| KWD_EXTERN KWD_FN name=IDENT PUNCT_LPAREN PUNCT_RPAREN PUNCT_SEMI { { name } }
-
-body:
-| PUNCT_LBRACE stmts=stmt* PUNCT_RBRACE { { stmts; ret=ExprUnit } }
-
-stmt:
-| KWD_RETURN expr=expr PUNCT_SEMI { StmtReturn expr }
-
-expr:
-| i=LIT_NEG_INT { ExprLit (LitNegInt i) }
-| i=LIT_INT { ExprLit (LitInt i) }
diff --git a/lib/typeck.ml b/lib/typeck.ml
deleted file mode 100644
index bc8152e..0000000
--- a/lib/typeck.ml
+++ /dev/null
@@ -1,27 +0,0 @@
-(* Hindley milner type checking *)
-
-open Ast
-
-(* Get a list of name -> type mappings of all the declarations to be used as a
- base type map for type checking *)
-let rec get_decl_map (program:program) : (string, ty) Hashtbl.t =
- let get_decl_sig (decl:decl) : string * ty =
- match decl with
- | DeclFunc func -> (func.name, TyFunc ([], TyUnit))
- | DeclExternFunc extern -> (extern.name, TyUnit)
- in
- match program with
- | [] -> Hashtbl.create 100
- | hd :: tl ->
- let (name, ty) = get_decl_sig hd in
- let next = get_decl_map tl in
- Hashtbl.add next name ty; next
-
-type state =
- { decls : (string, ty) Hashtbl.t
- ; func_sig : string
- ; stmts : stmt list
- }
-
-(* let rec typeck (state:state) : state =
- let typeck_stmt *)
diff --git a/lib/util.ml b/lib/util.ml
deleted file mode 100644
index 8e45ecd..0000000
--- a/lib/util.ml
+++ /dev/null
@@ -1,7 +0,0 @@
-exception Syntax_error of ((int * int) option * string)
-
-let get_lexing_position lexbuf =
- let p = Lexing.lexeme_start_p lexbuf in
- let line_number = p.Lexing.pos_lnum in
- let column = p.Lexing.pos_cnum - p.Lexing.pos_bol + 1 in
- (line_number, column)
diff --git a/spec.md b/spec.md
deleted file mode 100644
index 887202d..0000000
--- a/spec.md
+++ /dev/null
@@ -1,17 +0,0 @@
-Types
------
-
-- Primitive ints {u,i}{8,16,32,64}
-- Pointer
-- Struct
-
-IR
---
-
-Calling Convention
-------------------
-
-This language targets x86_64 linux architecture.
-
-- Arguments are passed via RDI, RSI, RDX, RCX, R8, R9.
-- Integer return values in RAX.
diff --git a/src/ast.rs b/src/ast.rs
new file mode 100644
index 0000000..98da2cd
--- /dev/null
+++ b/src/ast.rs
@@ -0,0 +1,32 @@
+use anyhow::Result;
+
+#[derive(Debug)]
+pub enum Decl {
+ Func(Func),
+}
+
+#[derive(Debug)]
+pub struct Func {
+ pub name: String,
+ pub return_ty: Type,
+ pub stmts: Vec,
+}
+
+#[derive(Debug)]
+pub enum Stmt {
+ Return(Option),
+}
+
+#[derive(Debug)]
+pub enum Expr {
+ Int(i64),
+}
+
+#[derive(Debug)]
+pub enum Type {
+ Int,
+}
+
+pub fn convert(program: Vec) -> Result {
+ Ok(String::new())
+}
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..7482e02
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,33 @@
+#[macro_use]
+extern crate lalrpop_util;
+#[macro_use]
+extern crate anyhow;
+
+lalrpop_mod!(parser);
+
+mod ast;
+
+use std::fs;
+use std::path::PathBuf;
+
+use anyhow::Result;
+use clap::Parser;
+
+use crate::parser::ProgramParser;
+
+#[derive(Debug, Parser)]
+struct Opt {
+ path: PathBuf,
+}
+
+fn main() -> Result<()> {
+ let opts = Opt::parse();
+
+ let contents = fs::read_to_string(opts.path)?;
+
+ let parser = ProgramParser::new();
+ let ast = parser.parse(&contents).unwrap();
+ println!("AST: {ast:?}");
+
+ Ok(())
+}
diff --git a/src/parser.lalrpop b/src/parser.lalrpop
new file mode 100644
index 0000000..c4fddd0
--- /dev/null
+++ b/src/parser.lalrpop
@@ -0,0 +1,32 @@
+use crate::ast::*;
+
+grammar;
+
+pub Program: Vec = Decl* => <>;
+
+Decl: Decl = {
+ Func => Decl::Func(<>),
+};
+
+Func: Func = {
+ "fn" "(" ")" "->" "{" "}" => Func { name, return_ty, stmts },
+};
+
+Stmt: Stmt = {
+ "return" ";" => Stmt::Return(expr),
+};
+
+Expr: Expr = {
+ Expr1 => <>,
+};
+
+Expr1: Expr = {
+ r"[0-9]+" => Expr::Int(<>.parse::().unwrap()),
+ "(" ")" => expr,
+};
+
+Type: Type = {
+ "int" => Type::Int,
+};
+
+Ident: String = r"([A-Za-z][A-Za-z0-9_]*)|(_[A-Za-z0-9_]+)" => <>.to_string();
diff --git a/test/dune b/test/dune
deleted file mode 100644
index a26a393..0000000
--- a/test/dune
+++ /dev/null
@@ -1,2 +0,0 @@
-(test
- (name e0))
diff --git a/test/e0.ml b/test/e0.ml
deleted file mode 100644
index e69de29..0000000