Method emitTupleAssign

source/python.js:17269–17292

(...args)

                lhsObject.setAttr(loc, this.method, lhs.attr, rhsValue);
            }
            emitTupleAssign(...args) {
                if (args.length === 2) {
                    const [tl, rhs] = args;
                    let n_binders = tl.elts.length;
                    const starred_unpack = this.validateAssignLhsExpr(tl.elts, tl);
                    if (starred_unpack) {
                        n_binders--;
                    }
                    const output = this.emitSugaredExpr(rhs, n_binders);
                    this.emitTupleAssign(tl, output, rhs.range(), n_binders, starred_unpack);
                } else if (args.length === 5) {
                    const [tl, rhs_output, rhs_loc, n_binders, starred_unpack] = args;
                    const outputs = rhs_output.asTuple(rhs_loc, this.method, starred_unpack ? null : n_binders);
                    if (outputs.length < n_binders) {
                        throw new python.Error('Not enough values to unpack.');
                    }
                    if (outputs.length > n_binders && !starred_unpack) {
                        throw new python.Error('Too many values to unpack.');
                    }
                    this.emitExprsAssign(tl.elts, outputs, rhs_loc, n_binders);
                } else {
                    throw new python.Error('Not implemented.');
                }
            }
            emitExprsAssign(lhs_exprs, outputs /*, rhs_loc, n_binders */) {
                let i = 0;
                for (const assignee of lhs_exprs) {