Add loads of errors, add argh

Cargo.lock

@@ -1,6 +1,89 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
+[[package]]
+name = "argh"
+version = "0.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "argh_derive 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "argh_shared 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "argh_derive"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "argh_shared 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "heck 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.18 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 1.0.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.33 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "argh_shared"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "heck"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "unicode-segmentation 1.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "proc-macro2"
+version = "1.0.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "unicode-xid 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "quote"
+version = "1.0.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "proc-macro2 1.0.18 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "reid"
 version = "0.1.0"
+dependencies = [
+ "argh 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
+]
 
+[[package]]
+name = "syn"
+version = "1.0.33"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "proc-macro2 1.0.18 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 1.0.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-xid 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "unicode-segmentation"
+version = "1.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "unicode-xid"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[metadata]
+"checksum argh 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "ca1877e24cecacd700d469066e0160c4f8497cc5635367163f50c8beec820154"
+"checksum argh_derive 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "e742194e0f43fc932bcb801708c2b279d3ec8f527e3acda05a6a9f342c5ef764"
+"checksum argh_shared 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "e1ba68f4276a778591e36a0c348a269888f3a177c8d2054969389e3b59611ff5"
+"checksum heck 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "20564e78d53d2bb135c343b3f47714a56af2061f1c928fdb541dc7b9fdd94205"
+"checksum proc-macro2 1.0.18 (registry+https://github.com/rust-lang/crates.io-index)" = "beae6331a816b1f65d04c45b078fd8e6c93e8071771f41b8163255bbd8d7c8fa"
+"checksum quote 1.0.7 (registry+https://github.com/rust-lang/crates.io-index)" = "aa563d17ecb180e500da1cfd2b028310ac758de548efdd203e18f283af693f37"
+"checksum syn 1.0.33 (registry+https://github.com/rust-lang/crates.io-index)" = "e8d5d96e8cbb005d6959f119f773bfaebb5684296108fb32600c00cde305b2cd"
+"checksum unicode-segmentation 1.6.0 (registry+https://github.com/rust-lang/crates.io-index)" = "e83e153d1053cbb5a118eeff7fd5be06ed99153f00dbcd8ae310c5fb2b22edc0"
+"checksum unicode-xid 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "f7fe0bb3479651439c9112f72b6c505038574c9fbb575ed1bf3b797fa39dd564"

Cargo.toml

@@ -11,3 +11,4 @@ keywords = ["compiler", "language", "scripting", "parsing", "virtual machine"]
 edition = "2018"
 
 [dependencies]
+argh = "0.1.3"

src/compiler.rs

@@ -3,7 +3,7 @@ use std::num::ParseIntError;
 
 use super::errors::CompilerError;
 use super::parser::{Expression, LiteralPattern, ParsedReid, Pattern, Position, Statement};
-use super::vm::{BuiltinFunctionDef, FunctionDef, FunctionSignature, VariableType};
+use super::vm::{FunctionSignature, VariableType};
 
 type Variable = (HeapID, VariableType);
 pub type FuncID = usize;

src/errors.rs

@@ -19,6 +19,7 @@ impl From<io::Error> for GenericError {
 
 #[derive(Debug)]
 pub enum SyntaxError {
+    #[allow(dead_code)]
     Fatal,
     ExpectedToken(Position, char),
     ExpectedExpression(Position, Option<Box<SyntaxError>>),
@@ -61,6 +62,7 @@ impl Display for SyntaxError {
 
 #[derive(Debug)]
 pub enum CompilerError {
+    #[allow(dead_code)]
     Fatal,
     VariableExists(Position, String),
     VariableNotExists(Position, String),
@@ -71,16 +73,6 @@ pub enum CompilerError {
     ParseIntError(ParseIntError),
 }
 
-impl CompilerError {
-    fn from_opt(from: &Option<Box<SyntaxError>>) -> String {
-        if let Some(err) = from {
-            format!("\n  {}", err)
-        } else {
-            String::new()
-        }
-    }
-}
-
 impl Display for CompilerError {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         let text = match self {
@@ -129,6 +121,7 @@ impl Display for ParamList {
 
 #[derive(Debug)]
 pub enum RuntimePanic {
+    #[allow(dead_code)]
     Fatal,
     InvalidCommandIdx(usize),
     ScopeStackUnderflow,

src/parser/mod.rs

@@ -82,8 +82,8 @@ impl Parser {
     pub fn expect<T: Into<String>>(&mut self, expectable: Expectable<T>) -> Expect {
         match expectable {
             Expectable::Static(val) => self.expect_static(val),
-            Ident => self.expect_ident(),
+            Expectable::Ident => self.expect_ident(),
-            StringLit => self.expect_string_lit(),
+            Expectable::StringLit => self.expect_string_lit(),
         }
     }
 
@@ -221,6 +221,7 @@ impl Parser {
         Position(self.line_number, self.character_number)
     }
 
+    #[allow(unused_assignments)]
     fn skip_whitespace_confident(&mut self, confident: bool) {
         let mut next = ' ';
         while self.remaining() > 0 && {
@@ -239,6 +240,7 @@ impl Parser {
     }
 }
 
+#[allow(dead_code)]
 pub enum Expectable<T: Into<String>> {
     Static(T),
     Ident,

src/vm/mod.rs

@@ -1,8 +1,6 @@
 pub mod functions;
 
 use std::collections::HashMap;
-use std::fmt;
-use std::fmt::Display;
 
 use super::compiler::{Command, CompiledReid, HeapID};
 use super::errors::RuntimePanic;