tseeker-pub/rust-crafting-interpreters-part-1
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AST - Variable assignment

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Emmanuel BENOîT 2022-12-31 16:16:12 +01:00
parent c486b81cba
commit b5ff24ffad
1 changed files with 4 additions and 0 deletions
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4
src/ast.rs
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@ -22,6 +22,9 @@ pub enum StmtNode {
/// An AST node that represents an expression. /// An AST node that represents an expression.
#[derive(Debug, Clone)] #[derive(Debug, Clone)]
pub enum ExprNode { pub enum ExprNode {
/// Assignment to a variable.
Assignment { name: Token, value: Box<ExprNode> },
/// Binary expression. /// Binary expression.
Binary { Binary {
left: Box<ExprNode>, left: Box<ExprNode>,
@ -79,6 +82,7 @@ impl AstDumper for StmtNode {
impl AstDumper for ExprNode { impl AstDumper for ExprNode {
fn dump(&self) -> String { fn dump(&self) -> String {
match self { match self {
Self::Assignment { name, value } => format!("( = {} {} )", name.lexeme, value.dump()),
Self::Binary { Self::Binary {
left, left,
operator, operator,