initial commit

Author: Andrew Weiss

.gitignore

@@ -0,0 +1,3 @@
+/target
+**/*.rs.bk
+Cargo.lock

.rustfmt.toml

@@ -0,0 +1 @@
+tab_spaces = 2

Cargo.toml

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+[package]
+name = "cddl"
+version = "0.1.0"
+authors = ["Andrew Weiss <[email protected]>"]
+edition = "2018"
+
+[dependencies]
+whoami = "0.4.1"

src/ast.rs

@@ -0,0 +1,173 @@
+use super::token::Token;
+use std::fmt;
+use std::string::ToString;
+
+pub trait Node {
+  fn token_literal(&self) -> Option<String>;
+}
+
+#[derive(Default, Debug)]
+pub struct CDDL {
+  pub rules: Vec<Rule>,
+}
+
+impl Node for CDDL {
+  fn token_literal(&self) -> Option<String> {
+    if self.rules.len() > 0 {
+      return self.rules[0].token_literal();
+    }
+
+    None
+  }
+}
+
+#[derive(Debug)]
+pub struct Identifier(pub Token);
+
+impl Node for Identifier {
+  fn token_literal(&self) -> Option<String> {
+    Some(format!("{:?}", self.0))
+  }
+}
+
+impl From<String> for Identifier {
+  fn from(s: String) -> Self {
+    Identifier(Token::IDENT(s))
+  }
+}
+
+impl ToString for Identifier {
+  fn to_string(&self) -> String {
+    format!("{}", self.0.to_string())
+  }
+}
+
+#[derive(Debug)]
+pub enum Rule {
+  Type(TypeRule),
+  Group(GroupRule),
+}
+
+impl Node for Rule {
+  fn token_literal(&self) -> Option<String> {
+    match self {
+      Rule::Type(tr) => tr.token_literal(),
+      Rule::Group(gr) => gr.token_literal(),
+    }
+  }
+}
+
+#[derive(Debug)]
+pub struct TypeRule {
+  pub name: Identifier,
+  pub generic_param: Option<GenericParm>,
+  pub is_type_choice_alternate: bool,
+  pub value: Type,
+}
+
+impl TypeRule {
+  pub fn token_literal(&self) -> Option<String> {
+    self.name.token_literal()
+  }
+}
+
+#[derive(Debug)]
+pub struct GroupRule {
+  pub name: Identifier,
+  pub generic_para: Option<GenericParm>,
+  pub is_group_choice_alternate: bool,
+  pub entry: GroupEntry,
+}
+
+impl Node for GroupRule {
+  fn token_literal(&self) -> Option<String> {
+    Some("".into())
+  }
+}
+
+#[derive(Default, Debug)]
+pub struct GenericParm(pub Vec<Identifier>);
+
+#[derive(Debug)]
+pub struct GenericArg(pub Vec<Type1>);
+
+#[derive(Debug)]
+pub struct Type(pub Vec<Type1>);
+
+#[derive(Debug)]
+pub struct Type1 {
+  pub type2: Type2,
+  pub operator: Option<(RangeCtlOp, Type2)>,
+}
+
+#[derive(Debug)]
+pub enum RangeCtlOp {
+  RangeOp(bool),
+  CtlOp(String),
+}
+
+#[derive(Debug)]
+pub enum Type2 {
+  Value(Identifier),
+  Typename((Identifier, Option<GenericArg>)),
+  Group(Type),
+  Map(Group),
+  Array(Group),
+  Unwrap((Identifier, Option<GenericArg>)),
+  ChoiceFromInlineGroup(Group),
+  ChoiceFromGroup((Identifier, Option<GenericArg>)),
+  TaggedData(String),
+  TaggedDataMajorType(String),
+  Any,
+}
+
+impl<'a> fmt::Display for Type2 {
+  fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    match self {
+      Type2::Typename((tn, _)) => write!(f, "{}", tn.0),
+      _ => write!(f, ""),
+    }
+  }
+}
+
+#[derive(Debug)]
+pub struct Group(Vec<GroupChoice>);
+
+#[derive(Debug)]
+pub struct GroupChoice(Vec<GroupEntry>);
+
+#[derive(Debug)]
+pub enum GroupEntry {
+  MemberKey(MemberKeyEntry),
+  Groupname(GroupnameEntry),
+  InlineGroup((Option<Occur>, Group)),
+}
+
+#[derive(Debug)]
+pub struct MemberKeyEntry {
+  pub occur: Option<Occur>,
+  pub member_key: Option<MemberKey>,
+  pub entry_type: Type, 
+}
+
+#[derive(Debug)]
+pub struct GroupnameEntry {
+  pub occur: Option<Occur>,
+  pub name: Identifier,
+  pub generic_arg: Option<GenericArg>,
+}
+
+#[derive(Debug)]
+pub enum MemberKey {
+  // if true, cut is present
+  Type1((Type1, bool)),
+  Bareword(Identifier),
+  Value(String)
+}
+
+#[derive(Debug)]
+pub enum Occur {
+  Exact((usize, usize)),
+  OneOrMore,
+  Optional,
+}

src/bin/repl.rs

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+use cddl::repl;
+use std::{error::Error, io};
+use whoami;
+
+fn main() -> Result<(), Box<Error>> {
+  let username = whoami::username();
+
+  println!("Hello {}! This is the CDDL language!", username);
+
+  println!("Feel free to type in commands");
+
+  let input = io::stdin();
+  let output = io::stdout();
+  repl::start(input.lock(), output.lock())?;
+  Ok(())
+}