SkNx: kth<...>() -> [...]

tests/SkNxTest.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "Sk4px.h"
 #include "SkNx.h"
 #include "SkRandom.h"
 #include "Test.h"
 
 template <int N>
 static void test_Nf(skiatest::Reporter* r) {
 
     auto assert_nearly_eq = [&](float eps, const SkNx<N, float>& v,
                                 float a, float b, float c, float d) {
         auto close = [=](float a, float b) { return fabsf(a-b) <= eps; };
         float vals[4];
         v.store(vals);
         bool ok = close(vals[0], a) && close(vals[1], b)
-               && close(v.template kth<0>(), a) && close(v.template kth<1>(), b);
+               && close(   v[0], a) && close(   v[1], b);
         REPORTER_ASSERT(r, ok);
         if (N == 4) {
             ok = close(vals[2], c) && close(vals[3], d)
-              && close(v.template kth<2>(), c) && close(v.template kth<3>(), d);
+              && close(   v[2], c) && close(   v[3], d);
             REPORTER_ASSERT(r, ok);
         }
     };
     auto assert_eq = [&](const SkNx<N, float>& v, float a, float b, float c, float d) {
         return assert_nearly_eq(0, v, a,b,c,d);
     };
 
     float vals[] = {3, 4, 5, 6};
     SkNx<N,float> a = SkNx<N,float>::Load(vals),
                   b(a),
@@ skipping 48 matching lines @@
     auto assert_eq = [&](const SkNx<N,T>& v, T a, T b, T c, T d, T e, T f, T g, T h) {
         T vals[8];
         v.store(vals);
 
         switch (N) {
           case 8: REPORTER_ASSERT(r, vals[4] == e && vals[5] == f && vals[6] == g && vals[7] == h);
           case 4: REPORTER_ASSERT(r, vals[2] == c && vals[3] == d);
           case 2: REPORTER_ASSERT(r, vals[0] == a && vals[1] == b);
         }
         switch (N) {
-          case 8: REPORTER_ASSERT(r, v.template kth<4>() == e && v.template kth<5>() == f &&
-                                     v.template kth<6>() == g && v.template kth<7>() == h);
-          case 4: REPORTER_ASSERT(r, v.template kth<2>() == c && v.template kth<3>() == d);
-          case 2: REPORTER_ASSERT(r, v.template kth<0>() == a && v.template kth<1>() == b);
+          case 8: REPORTER_ASSERT(r, v[4] == e && v[5] == f &&
+                                     v[6] == g && v[7] == h);
+          case 4: REPORTER_ASSERT(r, v[2] == c && v[3] == d);
+          case 2: REPORTER_ASSERT(r, v[0] == a && v[1] == b);
         }
     };
 
     T vals[] = { 1,2,3,4,5,6,7,8 };
     SkNx<N,T> a = SkNx<N,T>::Load(vals),
               b(a),
               c = a;
     SkNx<N,T> d;
     d = a;
 
     assert_eq(a, 1,2,3,4,5,6,7,8);
     assert_eq(b, 1,2,3,4,5,6,7,8);
     assert_eq(c, 1,2,3,4,5,6,7,8);
     assert_eq(d, 1,2,3,4,5,6,7,8);
 
     assert_eq(a+a, 2,4,6,8,10,12,14,16);
     assert_eq(a*a, 1,4,9,16,25,36,49,64);
     assert_eq(a*a-a, 0,2,6,12,20,30,42,56);
 
     assert_eq(a >> 2, 0,0,0,1,1,1,1,2);
     assert_eq(a << 1, 2,4,6,8,10,12,14,16);
 
-    REPORTER_ASSERT(r, a.template kth<1>() == 2);
+    REPORTER_ASSERT(r, a[1] == 2);
 }
 
 DEF_TEST(SkNx, r) {
     test_Ni<2, uint16_t>(r);
     test_Ni<4, uint16_t>(r);
     test_Ni<8, uint16_t>(r);
 
     test_Ni<2, int>(r);
     test_Ni<4, int>(r);
     test_Ni<8, int>(r);
 }
 
 DEF_TEST(SkNi_min_lt, r) {
     // Exhaustively check the 8x8 bit space.
     for (int a = 0; a < (1<<8); a++) {
     for (int b = 0; b < (1<<8); b++) {
         Sk16b aw(a), bw(b);
-        REPORTER_ASSERT(r, Sk16b::Min(aw, bw).kth<0>() == SkTMin(a, b));
-        REPORTER_ASSERT(r, !(aw < bw).kth<0>() == !(a < b));
+        REPORTER_ASSERT(r, Sk16b::Min(aw, bw)[0] == SkTMin(a, b));
+        REPORTER_ASSERT(r, !(aw < bw)[0] == !(a < b));
     }}
 
     // Exhausting the 16x16 bit space is kind of slow, so only do that in release builds.
 #ifdef SK_DEBUG
     SkRandom rand;
     for (int i = 0; i < (1<<16); i++) {
         uint16_t a = rand.nextU() >> 16,
                  b = rand.nextU() >> 16;
-        REPORTER_ASSERT(r, Sk16h::Min(Sk16h(a), Sk16h(b)).kth<0>() == SkTMin(a, b));
+        REPORTER_ASSERT(r, Sk16h::Min(Sk16h(a), Sk16h(b))[0] == SkTMin(a, b));
     }
 #else
     for (int a = 0; a < (1<<16); a++) {
     for (int b = 0; b < (1<<16); b++) {
-        REPORTER_ASSERT(r, Sk16h::Min(Sk16h(a), Sk16h(b)).kth<0>() == SkTMin(a, b));
+        REPORTER_ASSERT(r, Sk16h::Min(Sk16h(a), Sk16h(b))[0] == SkTMin(a, b));
     }}
 #endif
 }
 
 DEF_TEST(SkNi_saturatedAdd, r) {
     for (int a = 0; a < (1<<8); a++) {
     for (int b = 0; b < (1<<8); b++) {
         int exact = a+b;
         if (exact > 255) { exact = 255; }
         if (exact <   0) { exact =   0; }
 
-        REPORTER_ASSERT(r, Sk16b(a).saturatedAdd(Sk16b(b)).kth<0>() == exact);
+        REPORTER_ASSERT(r, Sk16b(a).saturatedAdd(Sk16b(b))[0] == exact);
     }
     }
 }
 
 DEF_TEST(Sk4px_muldiv255round, r) {
     for (int a = 0; a < (1<<8); a++) {
     for (int b = 0; b < (1<<8); b++) {
         int exact = (a*b+127)/255;
 
         // Duplicate a and b 16x each.
         auto av = Sk4px::DupAlpha(a),
              bv = Sk4px::DupAlpha(b);
 
         // This way should always be exactly correct.
-        int correct = (av * bv).div255().kth<0>();
+        int correct = (av * bv).div255()[0];
         REPORTER_ASSERT(r, correct == exact);
 
         // We're a bit more flexible on this method: correct for 0 or 255, otherwise off by <=1.
-        int fast = av.approxMulDiv255(bv).kth<0>();
+        int fast = av.approxMulDiv255(bv)[0];
         REPORTER_ASSERT(r, fast-exact >= -1 && fast-exact <= 1);
         if (a == 0 || a == 255 || b == 0 || b == 255) {
             REPORTER_ASSERT(r, fast == exact);
         }
     }
     }
 }
 
 DEF_TEST(Sk4px_widening, r) {
     SkPMColor colors[] = {
         SkPreMultiplyColor(0xff00ff00),
         SkPreMultiplyColor(0x40008000),
         SkPreMultiplyColor(0x7f020406),
         SkPreMultiplyColor(0x00000000),
     };
     auto packed = Sk4px::Load4(colors);
 
     auto wideLo = packed.widenLo(),
          wideHi = packed.widenHi(),
          wideLoHi    = packed.widenLoHi(),
          wideLoHiAlt = wideLo + wideHi;
     REPORTER_ASSERT(r, 0 == memcmp(&wideLoHi, &wideLoHiAlt, sizeof(wideLoHi)));
 }
 
 DEF_TEST(SkNx_abs, r) {
     auto fs = Sk4f(0.0f, -0.0f, 2.0f, -4.0f).abs();
-    REPORTER_ASSERT(r, fs.kth<0>() == 0.0f);
-    REPORTER_ASSERT(r, fs.kth<1>() == 0.0f);
-    REPORTER_ASSERT(r, fs.kth<2>() == 2.0f);
-    REPORTER_ASSERT(r, fs.kth<3>() == 4.0f);
+    REPORTER_ASSERT(r, fs[0] == 0.0f);
+    REPORTER_ASSERT(r, fs[1] == 0.0f);
+    REPORTER_ASSERT(r, fs[2] == 2.0f);
+    REPORTER_ASSERT(r, fs[3] == 4.0f);
 }
 
 DEF_TEST(SkNx_floor, r) {
     auto fs = Sk4f(0.4f, -0.4f, 0.6f, -0.6f).floor();
-    REPORTER_ASSERT(r, fs.kth<0>() ==  0.0f);
-    REPORTER_ASSERT(r, fs.kth<1>() == -1.0f);
-    REPORTER_ASSERT(r, fs.kth<2>() ==  0.0f);
-    REPORTER_ASSERT(r, fs.kth<3>() == -1.0f);
+    REPORTER_ASSERT(r, fs[0] ==  0.0f);
+    REPORTER_ASSERT(r, fs[1] == -1.0f);
+    REPORTER_ASSERT(r, fs[2] ==  0.0f);
+    REPORTER_ASSERT(r, fs[3] == -1.0f);
 }
 
 DEF_TEST(SkNx_shuffle, r) {
     Sk4f f4(0,10,20,30);
 
     Sk2f f2 = SkNx_shuffle<2,1>(f4);
     REPORTER_ASSERT(r, f2[0] == 20);
     REPORTER_ASSERT(r, f2[1] == 10);
 
     f4 = SkNx_shuffle<0,1,1,0>(f2);
@@ skipping 19 matching lines @@
     REPORTER_ASSERT(r, f[3] ==  0.0f);
 }
 
 #include "SkRandom.h"
 
 DEF_TEST(SkNx_u16_float, r) {
     {
         // u16 --> float
         auto h4 = Sk4h(15, 17, 257, 65535);
         auto f4 = SkNx_cast<float>(h4);
-        REPORTER_ASSERT(r, f4.kth<0>() == 15.0f);
-        REPORTER_ASSERT(r, f4.kth<1>() == 17.0f);
-        REPORTER_ASSERT(r, f4.kth<2>() == 257.0f);
-        REPORTER_ASSERT(r, f4.kth<3>() == 65535.0f);
+        REPORTER_ASSERT(r, f4[0] == 15.0f);
+        REPORTER_ASSERT(r, f4[1] == 17.0f);
+        REPORTER_ASSERT(r, f4[2] == 257.0f);
+        REPORTER_ASSERT(r, f4[3] == 65535.0f);
     }
     {
         // float -> u16
         auto f4 = Sk4f(15, 17, 257, 65535);
         auto h4 = SkNx_cast<uint16_t>(f4);
-        REPORTER_ASSERT(r, h4.kth<0>() == 15);
-        REPORTER_ASSERT(r, h4.kth<1>() == 17);
-        REPORTER_ASSERT(r, h4.kth<2>() == 257);
-        REPORTER_ASSERT(r, h4.kth<3>() == 65535);
+        REPORTER_ASSERT(r, h4[0] == 15);
+        REPORTER_ASSERT(r, h4[1] == 17);
+        REPORTER_ASSERT(r, h4[2] == 257);
+        REPORTER_ASSERT(r, h4[3] == 65535);
     }
 
     // starting with any u16 value, we should be able to have a perfect round-trip in/out of floats
     //
     SkRandom rand;
     for (int i = 0; i < 10000; ++i) {
         const uint16_t s16[4] {
             (uint16_t)rand.nextU16(), (uint16_t)rand.nextU16(),
             (uint16_t)rand.nextU16(), (uint16_t)rand.nextU16(),
         };
         auto u4_0 = Sk4h::Load(s16);
         auto f4 = SkNx_cast<float>(u4_0);
         auto u4_1 = SkNx_cast<uint16_t>(f4);
         uint16_t d16[4];
         u4_1.store(d16);
         REPORTER_ASSERT(r, !memcmp(s16, d16, sizeof(s16)));
     }
 }