Add parsing of array type

reid/examples/array.rs

@@ -0,0 +1,11 @@
+use reid::compile;
+
+pub static ARRAY: &str = include_str!("./reid/array.reid");
+
+fn main() {
+    let text = match compile(ARRAY) {
+        Ok(t) => t,
+        Err(e) => panic!("{}", e),
+    };
+    println!("{}", text);
+}

reid/examples/reid/array.reid

@@ -0,0 +1,13 @@
+// Arithmetic, function calls and imports!
+
+fn array() -> [u16; 4] {
+    return true;
+}
+
+fn main() -> u16 {
+    let heehoo = 10;
+
+    let list = array();
+
+    return heehoo;
+}

reid/examples/reid/medium.reid

@@ -1,12 +0,0 @@
-// if-statements, functions
-
-import std::print;
-
-fn fibonacci(value: i32) -> i32 {
-    if value < 3 {
-        return 1;
-    }
-    return fibonacci(value - 1) + fibonacci(value - 2);
-}
-
-print(fibonacci(15));

reid/src/ast/mod.rs

@@ -6,10 +6,10 @@ use crate::token_stream::TokenRange;
 pub mod parse;
 pub mod process;
 
-#[derive(Debug, Clone, Copy)]
+#[derive(Debug, Clone)]
 pub struct Type(pub TypeKind, pub TokenRange);
 
-#[derive(Debug, Clone, Copy)]
+#[derive(Debug, Clone)]
 pub enum TypeKind {
     Bool,
     I8,
@@ -22,6 +22,7 @@ pub enum TypeKind {
     U32,
     U64,
     U128,
+    Array(Box<TypeKind>, u64),
 }
 
 #[derive(Debug, Clone)]

reid/src/ast/parse.rs

@@ -13,24 +13,37 @@ where
 
 impl Parse for Type {
     fn parse(mut stream: TokenStream) -> Result<Self, Error> {
-        let kind = if let Some(Token::Identifier(ident)) = stream.next() {
-            Ok(match &*ident {
-                "bool" => TypeKind::Bool,
-                "i8" => TypeKind::I8,
-                "i16" => TypeKind::I16,
-                "i32" => TypeKind::I32,
-                "i64" => TypeKind::I64,
-                "i128" => TypeKind::I128,
-                "u8" => TypeKind::U8,
-                "u16" => TypeKind::U16,
-                "u32" => TypeKind::U32,
-                "u64" => TypeKind::U64,
-                "u128" => TypeKind::U128,
-                _ => panic!("asd"),
-            })
+        let kind = if let Some(Token::BracketOpen) = stream.peek() {
+            stream.expect(Token::BracketOpen)?;
+            let inner = stream.parse::<Type>()?;
+            stream.expect(Token::Semi)?;
+            let length = if let Some(Token::DecimalValue(length)) = stream.next() {
+                length
+            } else {
+                return Err(stream.expected_err("array length (number)")?);
+            };
+            stream.expect(Token::BracketClose)?;
+            TypeKind::Array(Box::new(inner.0), length)
         } else {
-            Err(stream.expected_err("type identifier")?)
-        }?;
+            if let Some(Token::Identifier(ident)) = stream.next() {
+                match &*ident {
+                    "bool" => TypeKind::Bool,
+                    "i8" => TypeKind::I8,
+                    "i16" => TypeKind::I16,
+                    "i32" => TypeKind::I32,
+                    "i64" => TypeKind::I64,
+                    "i128" => TypeKind::I128,
+                    "u8" => TypeKind::U8,
+                    "u16" => TypeKind::U16,
+                    "u32" => TypeKind::U32,
+                    "u64" => TypeKind::U64,
+                    "u128" => TypeKind::U128,
+                    _ => Err(stream.expected_err("known type identifier")?)?,
+                }
+            } else {
+                return Err(stream.expected_err("type identifier")?)?;
+            }
+        };
 
         Ok(Type(kind, stream.get_range().unwrap()))
     }
@@ -68,7 +81,7 @@ impl Parse for PrimaryExpression {
                     Expression(Kind::VariableName(v.clone()), stream.get_range().unwrap())
                 }
                 Token::DecimalValue(v) => Expression(
-                    Kind::Literal(Literal::Number(v.parse().unwrap())),
+                    Kind::Literal(Literal::Number(*v)),
                     stream.get_range().unwrap(),
                 ),
                 Token::True => Expression(

reid/src/ast/process.rs

@@ -29,6 +29,7 @@ impl ast::Module {
                         name: signature.name.clone(),
                         return_type: signature
                             .return_type
+                            .clone()
                             .map(|r| r.0.into())
                             .unwrap_or(mir::TypeKind::Void),
                         parameters: signature
@@ -63,6 +64,7 @@ impl ast::Block {
                         mir::VariableReference(
                             s_let
                                 .1
+                                .clone()
                                 .map(|t| t.0.into())
                                 .unwrap_or(mir::TypeKind::Vague(mir::VagueType::Unknown)),
                             s_let.0.clone(),
@@ -181,7 +183,7 @@ impl ast::Literal {
 
 impl From<ast::TypeKind> for mir::TypeKind {
     fn from(value: ast::TypeKind) -> Self {
-        match value {
+        match &value {
             ast::TypeKind::Bool => mir::TypeKind::Bool,
             ast::TypeKind::I8 => mir::TypeKind::I8,
             ast::TypeKind::I16 => mir::TypeKind::I16,
@@ -193,6 +195,7 @@ impl From<ast::TypeKind> for mir::TypeKind {
             ast::TypeKind::U32 => mir::TypeKind::U32,
             ast::TypeKind::U64 => mir::TypeKind::U64,
             ast::TypeKind::U128 => mir::TypeKind::U128,
+            ast::TypeKind::Array(type_kind, length) => todo!(),
         }
     }
 }

reid/src/lexer.rs

@@ -7,7 +7,7 @@ pub enum Token {
     // Values
     Identifier(String),
     /// Number with at most one decimal point
-    DecimalValue(String),
+    DecimalValue(u64),
 
     // Keywords
     /// `let`
@@ -62,6 +62,10 @@ pub enum Token {
     BraceOpen,
     /// `}`
     BraceClose,
+    /// `[`
+    BracketOpen,
+    /// `]`
+    BracketClose,
     /// `,`
     Comma,
 
@@ -194,7 +198,7 @@ pub fn tokenize<T: Into<String>>(to_tokenize: T) -> Result<Vec<FullToken>, Error
                     value += &c.to_string();
                     cursor.next();
                 }
-                Token::DecimalValue(value)
+                Token::DecimalValue(value.parse().expect("Decimal not parseable to u64"))
             }
             '-' if cursor.first() == Some('>') => {
                 cursor.next(); // Eat `>`
@@ -213,6 +217,8 @@ pub fn tokenize<T: Into<String>>(to_tokenize: T) -> Result<Vec<FullToken>, Error
             '!' => Token::Exclamation,
             '(' => Token::ParenOpen,
             ')' => Token::ParenClose,
+            '[' => Token::BracketOpen,
+            ']' => Token::BracketClose,
             '{' => Token::BraceOpen,
             '}' => Token::BraceClose,
             ',' => Token::Comma,