public If(Expr condition, Stmt thenBranch, Stmt elseBranch) { this.condition = condition; this.thenBranch = thenBranch; this.elseBranch = elseBranch; }
private void Resolve(Stmt stmt) { stmt.Accept(this); }
public While(Expr condition, Stmt body) { this.condition = condition; this.body = body; }
// our first desugaring private Stmt ForStatement() { loopDepth++; try { Consume(Token.TokenType.LeftParenthesis, "Expect '(' after 'for'."); Stmt initializer; if (Match(Token.TokenType.Semicolon)) { initializer = null; } else if (Match(Token.TokenType.Var)) { initializer = VarDeclaration(); } else { initializer = ExpressionStatement(); } Expr condition = null; if (!Check(Token.TokenType.Semicolon)) { condition = Expression(); } Consume(Token.TokenType.Semicolon, "Expect ';' after loop condition."); Expr increment = null; if (!Check(Token.TokenType.RightParenthesis)) { increment = Expression(); } Consume(Token.TokenType.RightParenthesis, "Expect ')' after for clauses."); Stmt body = Statement(); if (increment != null) { body = new Stmt.Block( new List <Stmt>() { body, new Stmt.Expression(increment) } ); } if (condition == null) { condition = new Expr.Literal(true); } body = new Stmt.While(condition, body); if (initializer != null) { body = new Stmt.Block( new List <Stmt>() { initializer, body } ); } return(body); } finally { loopDepth--; } }