bigint.js (2599B)
1 // Copyright (C) 2017 Josh Wolfe. All rights reserved. 2 // This code is governed by the BSD license found in the LICENSE file. 3 4 /*--- 5 description: Prefix increment for references to BigInt values 6 esid: sec-prefix-increment-operator-runtime-semantics-evaluation 7 info: | 8 1. Let expr be the result of evaluating UnaryExpression. 9 2. Let oldValue be ? ToNumeric(? GetValue(expr)). 10 3. Let newValue be ? Type(oldvalue)::add(oldValue, Type(oldValue)::unit). 11 4. Perform ? PutValue(expr, newValue). 12 5. Return newValue. 13 features: [BigInt] 14 ---*/ 15 16 var x = 0n; 17 assert.sameValue(++x, 1n, "var x = 0n; ++x === 1n"); 18 assert.sameValue(x, 1n, "var x = 0n; ++x; x === 1n"); 19 20 var x = -1n; 21 assert.sameValue(++x, 0n, "var x = -1n; ++x === 0n"); 22 assert.sameValue(x, 0n, "var x = -1n; ++x; x === 0n"); 23 24 var x = 123456n; 25 assert.sameValue(++x, 123457n, "var x = 123456n; ++x === 123457n"); 26 assert.sameValue(x, 123457n, "var x = 123456n; ++x; x === 123457n"); 27 28 var x = -123457n; 29 assert.sameValue(++x, -123456n, "var x = -123457n; ++x === -123456n"); 30 assert.sameValue(x, -123456n, "var x = -123457n; ++x; x === -123456n"); 31 32 var x = 0x1fffffffffffff00n; 33 assert.sameValue(++x, 0x1fffffffffffff01n, "var x = 0x1fffffffffffff00n; ++x === 0x1fffffffffffff01n"); 34 assert.sameValue(x, 0x1fffffffffffff01n, "var x = 0x1fffffffffffff00n; ++x; x === 0x1fffffffffffff01n"); 35 36 var x = -0x1fffffffffffff01n; 37 assert.sameValue(++x, -0x1fffffffffffff00n, "var x = -0x1fffffffffffff01n; ++x === -0x1fffffffffffff00n"); 38 assert.sameValue(x, -0x1fffffffffffff00n, "var x = -0x1fffffffffffff01n; ++x; x === -0x1fffffffffffff00n"); 39 40 var x = {y:0n}; 41 assert.sameValue(++x.y, 1n, "var x = {y:0n}; ++x.y === 1n"); 42 assert.sameValue(x.y, 1n, "var x = {y:0n}; ++x.y; x.y === 1n"); 43 44 var x = {y:{z:0n}}; 45 assert.sameValue(++x.y.z, 1n, "var x = {y:{z:0n}}; ++x.y.z === 1n"); 46 assert.sameValue(x.y.z, 1n, "var x = {y:{z:0n}}; ++x.y.z; x.y.z === 1n"); 47 48 var x = [0n]; 49 assert.sameValue(++x[0], 1n, "var x = [0n]; ++x[0] === 1n"); 50 assert.sameValue(x[0], 1n, "var x = [0n]; ++x[0]; x[0] === 1n"); 51 52 var x = [null, [null, null, 0n]]; 53 assert.sameValue(++x[1][2], 1n, "var x = [null, [null, null, 0n]]; ++x[1][2] === 1n"); 54 assert.sameValue(x[1][2], 1n, "var x = [null, [null, null, 0n]]; ++x[1][2]; x[1][2] === 1n"); 55 56 var x = {y:[0n]}; 57 assert.sameValue(++x.y[0], 1n, "var x = {y:[0n]}; ++x.y[0] === 1n"); 58 assert.sameValue(x.y[0], 1n, "var x = {y:[0n]}; ++x.y[0]; x.y[0] === 1n"); 59 60 var x = [{z:0n}]; 61 assert.sameValue(++x[0].z, 1n, "var x = [{z:0n}]; ++x[0].z === 1n"); 62 assert.sameValue(x[0].z, 1n, "var x = [{z:0n}]; ++x[0].z; x[0].z === 1n"); 63 64 reportCompare(0, 0);