Blocs d'instructions

src/parser.rs

@@ -2,7 +2,7 @@ use crate::expr::{Assign, Binary, Expr, Grouping, Unary, Variable};
 use crate::expr::Literal::{LiteralBool, LiteralNumber, LiteralString};
 use crate::token::Token;
 use crate::token_type::TokenType;
-use crate::stmt::{ExpressionStatement, PrintStatement, Statement, VarStatement};
+use crate::stmt::{BlockStatement, ExpressionStatement, PrintStatement, Statement, VarStatement};
 
 pub struct Parser {
     tokens: Vec<Token>,
@@ -225,10 +225,26 @@ impl Parser {
 
     fn statement(&mut self) -> Result<Statement, ParseError> {
         if self.match_token(&[TokenType::Print]) {
-            self.print_statement()
-        } else {
-            self.expr_statement()
+            return self.print_statement();
         }
+
+        if self.match_token(&[TokenType::LeftBrace]) {
+            return self.block_statement();
+        }
+
+        self.expr_statement()
+    }
+
+    fn block_statement(&mut self) -> Result<Statement, ParseError> {
+        let mut statements: Vec<Statement> = Vec::new();
+
+        while !self.check(&TokenType::RightBrace) && !self.is_at_end() {
+            statements.push(self.declaration()?);
+        }
+
+        self.consume(&TokenType::RightBrace, String::from("Expect '}' after block"))?;
+
+        Ok(Statement::Block(BlockStatement::new(statements)))
     }
 
     fn print_statement(&mut self) -> Result<Statement, ParseError> {