setup main to specify an entry point

Cargo.lock

@@ -8,6 +8,14 @@ dependencies = [
  "memchr 2.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "ansi_term"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "arrayref"
 version = "0.3.6"
@@ -100,8 +108,9 @@ dependencies = [
 
 [[package]]
 name = "boring-lang"
-version = "0.1.0"
+version = "0.0.1"
 dependencies = [
+ "clap 2.33.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "inkwell 0.1.0 (git+https://github.com/TheDan64/inkwell?branch=llvm7-0)",
  "lalrpop 0.18.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "lalrpop-util 0.18.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -128,6 +137,20 @@ name = "cfg-if"
 version = "0.1.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "clap"
+version = "2.33.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "ansi_term 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "atty 0.2.14 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "strsim 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "textwrap 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-width 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "vec_map 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "cloudabi"
 version = "0.0.3"
@@ -685,6 +708,11 @@ name = "string_cache_shared"
 version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "strsim"
+version = "0.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "strsim"
 version = "0.9.3"
@@ -720,6 +748,14 @@ dependencies = [
  "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "textwrap"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "unicode-width 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "thread_local"
 version = "1.0.1"
@@ -733,6 +769,11 @@ name = "typenum"
 version = "1.11.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "unicode-width"
+version = "0.1.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "unicode-xid"
 version = "0.1.0"
@@ -743,6 +784,11 @@ name = "unicode-xid"
 version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "vec_map"
+version = "0.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "wasi"
 version = "0.9.0+wasi-snapshot-preview1"
@@ -769,6 +815,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [metadata]
 "checksum aho-corasick 0.7.10 (registry+https://github.com/rust-lang/crates.io-index)" = "8716408b8bc624ed7f65d223ddb9ac2d044c0547b6fa4b0d554f3a9540496ada"
+"checksum ansi_term 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ee49baf6cb617b853aa8d93bf420db2383fab46d314482ca2803b40d5fde979b"
 "checksum arrayref 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)" = "a4c527152e37cf757a3f78aae5a06fbeefdb07ccc535c980a3208ee3060dd544"
 "checksum arrayvec 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "cff77d8686867eceff3105329d4698d96c2391c176d5d03adc90c7389162b5b8"
 "checksum ascii-canvas 2.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ff8eb72df928aafb99fe5d37b383f2fe25bd2a765e3e5f7c365916b6f2463a29"
@@ -786,6 +833,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum byteorder 1.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "08c48aae112d48ed9f069b33538ea9e3e90aa263cfa3d1c24309612b1f7472de"
 "checksum cc 1.0.50 (registry+https://github.com/rust-lang/crates.io-index)" = "95e28fa049fda1c330bcf9d723be7663a899c4679724b34c81e9f5a326aab8cd"
 "checksum cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)" = "4785bdd1c96b2a846b2bd7cc02e86b6b3dbf14e7e53446c4f54c92a361040822"
+"checksum clap 2.33.0 (registry+https://github.com/rust-lang/crates.io-index)" = "5067f5bb2d80ef5d68b4c87db81601f0b75bca627bc2ef76b141d7b846a3c6d9"
 "checksum cloudabi 0.0.3 (registry+https://github.com/rust-lang/crates.io-index)" = "ddfc5b9aa5d4507acaf872de71051dfd0e309860e88966e1051e462a077aac4f"
 "checksum constant_time_eq 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "245097e9a4535ee1e3e3931fcfcd55a796a44c643e8596ff6566d68f09b87bbc"
 "checksum crossbeam-utils 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)" = "c3c7c73a2d1e9fc0886a08b93e98eb643461230d5f1925e4036204d5f2e261a8"
@@ -853,14 +901,18 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum string_cache 0.7.5 (registry+https://github.com/rust-lang/crates.io-index)" = "89c058a82f9fd69b1becf8c274f412281038877c553182f1d02eb027045a2d67"
 "checksum string_cache_codegen 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)" = "f0f45ed1b65bf9a4bf2f7b7dc59212d1926e9eaf00fa998988e420fd124467c6"
 "checksum string_cache_shared 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "b1884d1bc09741d466d9b14e6d37ac89d6909cbcac41dd9ae982d4d063bbedfc"
+"checksum strsim 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)" = "8ea5119cdb4c55b55d432abb513a0429384878c15dde60cc77b1c99de1a95a6a"
 "checksum strsim 0.9.3 (registry+https://github.com/rust-lang/crates.io-index)" = "6446ced80d6c486436db5c078dde11a9f73d42b57fb273121e160b84f63d894c"
 "checksum syn 0.15.44 (registry+https://github.com/rust-lang/crates.io-index)" = "9ca4b3b69a77cbe1ffc9e198781b7acb0c7365a883670e8f1c1bc66fba79a5c5"
 "checksum syn 1.0.17 (registry+https://github.com/rust-lang/crates.io-index)" = "0df0eb663f387145cab623dea85b09c2c5b4b0aef44e945d928e682fce71bb03"
 "checksum term 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)" = "edd106a334b7657c10b7c540a0106114feadeb4dc314513e97df481d5d966f42"
+"checksum textwrap 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d326610f408c7a4eb6f51c37c330e496b08506c9457c9d34287ecc38809fb060"
 "checksum thread_local 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "d40c6d1b69745a6ec6fb1ca717914848da4b44ae29d9b3080cbee91d72a69b14"
 "checksum typenum 1.11.2 (registry+https://github.com/rust-lang/crates.io-index)" = "6d2783fe2d6b8c1101136184eb41be8b1ad379e4657050b8aaff0c79ee7575f9"
+"checksum unicode-width 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)" = "caaa9d531767d1ff2150b9332433f32a24622147e5ebb1f26409d5da67afd479"
 "checksum unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "fc72304796d0818e357ead4e000d19c9c174ab23dc11093ac919054d20a6a7fc"
 "checksum unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "826e7639553986605ec5979c7dd957c7895e93eabed50ab2ffa7f6128a75097c"
+"checksum vec_map 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)" = "05c78687fb1a80548ae3250346c3db86a80a7cdd77bda190189f2d0a0987c81a"
 "checksum wasi 0.9.0+wasi-snapshot-preview1 (registry+https://github.com/rust-lang/crates.io-index)" = "cccddf32554fecc6acb585f82a32a72e28b48f8c4c1883ddfeeeaa96f7d8e519"
 "checksum winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)" = "8093091eeb260906a183e6ae1abdba2ef5ef2257a21801128899c3fc699229c6"
 "checksum winapi-i686-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "boring-lang"
-version = "0.1.0"
+version = "0.0.1"
 authors = ["asegavac"]
 edition = "2018"
 
@@ -14,3 +14,4 @@ features = ["lexer"]
 lalrpop-util = "0.18.1"
 regex = "1"
 inkwell = { git = "https://github.com/TheDan64/inkwell", branch = "llvm7-0" }
+clap = "2.33.0"

examples/math/main.bl

@@ -0,0 +1,11 @@
+fn add(a, b) {
+    a + b
+}
+
+fn subtract(a, b) {
+    a - b
+}
+
+fn main() {
+    add(4, subtract(5, 2))
+}

src/ast.rs

@@ -5,14 +5,6 @@ pub enum Operator {
     Div,
     Plus,
     Minus,
-    // Gt,
-    // Gte,
-    // Lt,
-    // Lte,
-    // Eq,
-    // Mod,
-    // Exp,
-    // FloorDiv,
 }
 
 
@@ -20,10 +12,6 @@ pub struct LiteralInt {
     pub value: i64
 }
 
-// pub struct LiteralString {
-//     value: String
-// }
-
 pub struct Identifier {
     pub name: String
 }
@@ -35,7 +23,6 @@ pub struct FunctionCall {
 
 pub enum Expression {
     LiteralInt(LiteralInt),
-    // LiteralString(LiteralString),
     FunctionCall(FunctionCall),
     Identifier(Identifier),
     Op(Box<Expression>, Operator, Box<Expression>),
@@ -47,23 +34,15 @@ pub struct Block {
 
 pub struct VariableDeclaration {
     pub name: Identifier,
-    // type: Identifier,
 }
 
 pub struct Function {
     pub name: Identifier,
-    // return_type: Identifier,
     pub arguments: Vec<VariableDeclaration>,
     pub block: Block,
 }
 
 
-// pub struct Assignment {
-//     variable: VariableDeclaration,
-//     expression: Expression,
-// }
-
-
 pub struct Module {
     pub functions: Vec<Function>,
 }

src/compiler.rs

@@ -62,7 +62,6 @@ impl<'ctx> ModuleCodeGen<'ctx> {
     }
 
     pub fn gen_function_call(&mut self, scope: &Scope<'ctx>, function_call: &ast::FunctionCall) -> IntValue<'ctx> {
-        println!("Calling function: {}", &function_call.name.name);
         let fn_value = self.module.get_function(&function_call.name.name).unwrap();
         let mut arguments = Vec::new();
         for expression in (&function_call.arguments).into_iter() {
@@ -89,7 +88,6 @@ impl<'ctx> ModuleCodeGen<'ctx> {
             args.push(self.context.i64_type().into());
         }
         let fn_type = self.context.i64_type().fn_type(&args, false);
-        println!("Adding function: {}", &function.name.name);
         let fn_value = self.module.add_function(&function.name.name, fn_type, None);
         fn_value
     }

src/main.rs

@@ -3,26 +3,49 @@ mod ast;
 
 lalrpop_mod!(pub grammar); // synthesized by LALRPOP
 
+use std::fs;
+use std::io::Write;
 mod compiler;
 use inkwell::context::Context;
+extern crate clap;
+use clap::{Arg, App};
+
 
 fn main() {
-    let module_ast = grammar::ModuleParser::new().parse("
+    let matches = App::new("Boring Language Compiler")
-    fn add(a, b) {
+                          .version("0.0.1")
-        a + b
+                          .author("Andrew Segavac")
-    }
+                          .about("Compiles boring language files to LLVM IR.")
-    fn subtract(a, b) {
+                          .arg(Arg::with_name("OUTPUT")
-        a - b
+                               .short("o")
-    }
+                               .long("out")
-    fn main() {
+                               .value_name("OUTOUT")
-        add(4, subtract(5, 2))
+                               .help("Sets an output file")
-    }
+                               .takes_value(true))
-    ").unwrap();
+                          .arg(Arg::with_name("INPUT")
+                               .help("Sets the input file")
+                               .required(true)
+                               .index(1))
+                          .arg(Arg::with_name("v")
+                               .short("v")
+                               .multiple(true)
+                               .help("Sets the level of verbosity"))
+                          .get_matches();
+    let input = matches.value_of("INPUT").unwrap();
+
+    let default_output = input.rsplitn(2, ".").collect::<Vec<&str>>().last().unwrap().clone();
+    let output = matches.value_of("OUTPUT").unwrap_or(default_output);
+
+    let contents = fs::read_to_string(input).expect("input file not found");
+    let module_ast =  grammar::ModuleParser::new().parse(&contents).unwrap(); //TODO: convert to error
+
 
     let context = Context::create();
     let mut code_gen = compiler::ModuleCodeGen::new(&context, "main".to_string());
     code_gen.gen_module(module_ast);
-    println!("{}", code_gen.dump());
+
+    let mut f = fs::File::create(output).expect("Unable to create out file");
+    f.write_all(code_gen.dump().as_bytes()).expect("Unable to write data");
 }