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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 - -The GNU General Public License is a free, copyleft license for -software and other kinds of works. - -The licenses for most software and other practical works are designed -to take away your freedom to share and change the works. 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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