Edit file File name : first_in_statement.js Content :import { AST_Binary, AST_Conditional, AST_Dot, AST_Sequence, AST_Statement, AST_Sub, AST_UnaryPostfix } from "../ast.js"; // return true if the node at the top of the stack (that means the // innermost node in the current output) is lexically the first in // a statement. function first_in_statement(stack) { let node = stack.parent(-1); for (let i = 0, p; p = stack.parent(i); i++) { if (p instanceof AST_Statement && p.body === node) return true; if ((p instanceof AST_Sequence && p.expressions[0] === node) || (p.TYPE === "Call" && p.expression === node) || (p instanceof AST_Dot && p.expression === node) || (p instanceof AST_Sub && p.expression === node) || (p instanceof AST_Conditional && p.condition === node) || (p instanceof AST_Binary && p.left === node) || (p instanceof AST_UnaryPostfix && p.expression === node) ) { node = p; } else { return false; } } } export { first_in_statement }; Save