Implemented read in Parser

src/ast.rs

@@ -73,6 +73,7 @@ pub enum StmtKind {
         args: Vec<Expr>,
     },
     Print(Expr),
+    Read(Iden),
     Melo(Iden),
     Rlyeh,
     Rickroll,

src/interpret.rs

@@ -280,6 +280,7 @@ impl ExecEnv {
                     .write_all(include_str!("rickroll").as_bytes())
                     .expect("Failed to write to stdout");
             }
+            StmtKind::Read(_) => todo!(),
         }
 
         Ok(HaltStatus::Finished)

src/lexer.rs

@@ -86,6 +86,10 @@ pub enum Token {
     #[token("print")]
     Print,
 
+    /// Read input into preceding variable
+    #[token("read")]
+    Read,
+
     /// Ban the following variable from ever being used again
     #[token("melo")]
     Melo,

src/parser.rs

@@ -318,6 +318,18 @@ impl<'source> Parser<'source> {
                         };
                     }
                 }
+
+                // Read input
+                Token::Read => {
+                    if let Some(Expr {
+                        kind: ExprKind::Variable(iden),
+                        span,
+                    }) = buf
+                    {
+                        break self.semi_terminated(StmtKind::Read(Iden::new(iden, span)))?;
+                    }
+                }
+
                 t => buf = Some(self.parse_expr(t, &mut buf)?),
             }
         };