added statement parsing

src/stmt.rs

@@ -0,0 +1,32 @@
+use crate::expr::Expr;
+
+#[derive(Debug)]
+pub enum CondOp {
+    Eq,
+    Neq,
+    Lt,
+    Gt,
+    Lte,
+    Gte
+}
+
+#[derive(Debug)]
+pub struct Condition {
+    pub op: CondOp,
+    pub left: Expr,
+    pub right: Expr
+}
+
+#[derive(Debug)]
+pub enum Stmt {
+     Mov { src: Expr, dst: String },
+     IfElse { condition: Condition, then: Vec<Stmt>, else_: Option<Vec<Stmt>> },
+     Loop { body: Vec<Stmt> },
+     While { condition: Condition, body: Vec<Stmt> },
+     ForRange { var: String, start: Expr, end: Expr, step: Option<Expr>, body: Vec<Stmt> },
+     ForIn { var: String, list: Expr, body: Vec<Stmt> },
+     Call { name: String, args: Vec<Expr> },
+     FuncDef { name: String, params: Vec<String>, body: Vec<Stmt> },
+     Break,
+     Continue
+}