From 8e5a26bcc3a7295c8393a3ee096f4994211c31f7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Emmanuel=20Beno=C3=AEt?= <tseeker@nocternity.net>
Date: Sat, 31 Dec 2022 15:30:53 +0100
Subject: [PATCH] AST - Added variable declarations
---
src/ast.rs | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/src/ast.rs b/src/ast.rs
index 28157d0..a4e99ce 100644
--- a/src/ast.rs
+++ b/src/ast.rs
@@ -11,6 +11,8 @@ pub struct ProgramNode(pub Vec<StmtNode>);
/// An AST node that represents a statement.
#[derive(Debug, Clone)]
pub enum StmtNode {
+ /// A variable declaration
+ VarDecl(String, Option<ExprNode>),
/// An single expression
Expression(ExprNode),
/// The print statement
@@ -63,6 +65,8 @@ impl AstDumper for ProgramNode {
impl AstDumper for StmtNode {
fn dump(&self) -> String {
match self {
+ Self::VarDecl(name, Some(expr)) => format!("( var {} {} )", name, expr.dump()),
+ Self::VarDecl(name, None) => format!("( var {} nil )", name),
Self::Expression(expr) => format!("( {} )", expr.dump()),
Self::Print(expr) => format!("(print {})", expr.dump()),
}