Add parsing of string literals

reid/src/ast/mod.rs

@@ -29,6 +29,7 @@ pub enum TypeKind {
 pub enum Literal {
     Number(u64),
     Bool(bool),
+    String(String),
 }
 
 #[derive(Debug, Clone)]

reid/src/ast/parse.rs

@@ -84,6 +84,10 @@ impl Parse for PrimaryExpression {
                     Kind::Literal(Literal::Number(*v)),
                     stream.get_range().unwrap(),
                 ),
+                Token::StringLit(v) => Expression(
+                    Kind::Literal(Literal::String(v.clone())),
+                    stream.get_range().unwrap(),
+                ),
                 Token::True => Expression(
                     Kind::Literal(Literal::Bool(true)),
                     stream.get_range().unwrap(),

reid/src/ast/process.rs

@@ -204,6 +204,7 @@ impl ast::Literal {
         match *self {
             ast::Literal::Number(v) => mir::Literal::Vague(mir::VagueLiteral::Number(v)),
             ast::Literal::Bool(v) => mir::Literal::Bool(v),
+            ast::Literal::String(_) => todo!("process string literal"),
         }
     }
 }