block-scoping-sloppy.js 7.8 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27
// Copyright 2011 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
//       notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
//       copyright notice, this list of conditions and the following
//       disclaimer in the documentation and/or other materials provided
//       with the distribution.
//     * Neither the name of Google Inc. nor the names of its
//       contributors may be used to endorse or promote products derived
//       from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

28
// Flags: --allow-natives-syntax --opt
29 30 31 32 33 34 35 36 37 38 39
// Test functionality of block scopes.

// Hoisting of var declarations.
function f1() {
  {
    var x = 1;
    var y;
  }
  assertEquals(1, x)
  assertEquals(undefined, y)
}
40
%PrepareFunctionForOptimization(f1);
41 42 43
for (var j = 0; j < 5; ++j) f1();
%OptimizeFunctionOnNextCall(f1);
f1();
44
assertOptimized(f1);
45 46 47 48 49 50

// Dynamic lookup in and through block contexts.
function f2(one) {
  var x = one + 1;
  let y = one + 2;
  const u = one + 4;
51
  class a { static foo() { return one + 6; } }
52 53 54
  {
    let z = one + 3;
    const v = one + 5;
55
    class b { static foo() { return one + 7; } }
56 57 58 59 60 61
    assertEquals(1, eval('one'));
    assertEquals(2, eval('x'));
    assertEquals(3, eval('y'));
    assertEquals(4, eval('z'));
    assertEquals(5, eval('u'));
    assertEquals(6, eval('v'));
62 63
    assertEquals(7, eval('a.foo()'));
    assertEquals(8, eval('b.foo()'));
64 65 66 67 68 69 70 71 72 73
  }
}

f2(1);

// Lookup in and through block contexts.
function f3(one) {
  var x = one + 1;
  let y = one + 2;
  const u = one + 4;
74
  class a { static foo() { return one + 6; } }
75 76 77
  {
    let z = one + 3;
    const v = one + 5;
78
    class b { static foo() { return one + 7; } }
79 80 81 82 83 84
    assertEquals(1, one);
    assertEquals(2, x);
    assertEquals(3, y);
    assertEquals(4, z);
    assertEquals(5, u);
    assertEquals(6, v);
85 86
    assertEquals(7, a.foo());
    assertEquals(8, b.foo());
87 88
  }
}
89
%PrepareFunctionForOptimization(f3);
90 91 92 93 94 95 96 97 98 99 100
for (var j = 0; j < 5; ++j) f3(1);
%OptimizeFunctionOnNextCall(f3);
f3(1);



// Dynamic lookup from closure.
function f4(one) {
  var x = one + 1;
  let y = one + 2;
  const u = one + 4;
101
  class a { static foo() { return one + 6; } }
102 103 104
  {
    let z = one + 3;
    const v = one + 5;
105
    class b { static foo() { return one + 7; } }
106 107 108 109 110 111 112
    function f() {
      assertEquals(1, eval('one'));
      assertEquals(2, eval('x'));
      assertEquals(3, eval('y'));
      assertEquals(4, eval('z'));
      assertEquals(5, eval('u'));
      assertEquals(6, eval('v'));
113 114
      assertEquals(7, eval('a.foo()'));
      assertEquals(8, eval('b.foo()'));
115 116 117 118 119 120 121 122 123 124 125 126
    }
    f();
  }
}
f4(1);


// Lookup from closure.
function f5(one) {
  var x = one + 1;
  let y = one + 2;
  const u = one + 4;
127
  class a { static foo() { return one + 6; } }
128 129 130
  {
    let z = one + 3;
    const v = one + 5;
131
    class b { static foo() { return one + 7; } }
132 133 134 135 136 137 138
    function f() {
      assertEquals(1, one);
      assertEquals(2, x);
      assertEquals(3, y);
      assertEquals(4, z);
      assertEquals(5, u);
      assertEquals(6, v);
139 140
      assertEquals(7, a.foo());
      assertEquals(8, b.foo());
141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166
    }
    f();
  }
}
f5(1);


// Return from block.
function f6() {
  let x = 1;
  const u = 3;
  {
    let y = 2;
    const v = 4;
    return x + y;
  }
}
assertEquals(3, f6(6));


// Variable shadowing and lookup.
function f7(a) {
  let b = 1;
  var c = 1;
  var d = 1;
  const e = 1;
167 168
  class f { static foo() { return 1; } }
  { // let variables shadowing argument, let, const, class and var variables
169 170 171 172
    let a = 2;
    let b = 2;
    let c = 2;
    let e = 2;
173
    let f = 2;
174 175 176 177
    assertEquals(2,a);
    assertEquals(2,b);
    assertEquals(2,c);
    assertEquals(2,e);
178
    assertEquals(2,f);
179 180 181 182 183 184
  }
  { // const variables shadowing argument, let, const and var variables
    const a = 2;
    const b = 2;
    const c = 2;
    const e = 2;
185
    const f = 2;
186 187 188 189
    assertEquals(2,a);
    assertEquals(2,b);
    assertEquals(2,c);
    assertEquals(2,e);
190 191 192 193 194 195 196 197 198 199 200 201 202 203
    assertEquals(2,f);
  }
  { // class variables shadowing argument, let, const and var variables
    class a { static foo() { return 2; } }
    class b { static foo() { return 2; } }
    class c { static foo() { return 2; } }
    class d { static foo() { return 2; } }
    class e { static foo() { return 2; } }
    class f { static foo() { return 2; } }
    assertEquals(2,a.foo());
    assertEquals(2,b.foo());
    assertEquals(2,c.foo());
    assertEquals(2,e.foo());
    assertEquals(2,f.foo());
204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260
  }
  try {
    throw 'stuff1';
  } catch (a) {
    assertEquals('stuff1',a);
    // catch variable shadowing argument
    a = 2;
    assertEquals(2,a);
    {
      // let variable shadowing catch variable
      let a = 3;
      assertEquals(3,a);
      try {
        throw 'stuff2';
      } catch (a) {
        assertEquals('stuff2',a);
        // catch variable shadowing let variable
        a = 4;
        assertEquals(4,a);
      }
      assertEquals(3,a);
    }
    assertEquals(2,a);
  }
  try {
    throw 'stuff3';
  } catch (c) {
    // catch variable shadowing var variable
    assertEquals('stuff3',c);
    {
      // const variable shadowing catch variable
      const c = 3;
      assertEquals(3,c);
    }
    assertEquals('stuff3',c);
    try {
      throw 'stuff4';
    } catch(c) {
      assertEquals('stuff4',c);
      // catch variable shadowing catch variable
      c = 3;
      assertEquals(3,c);
    }
    (function(c) {
      // argument shadowing catch variable
      c = 3;
      assertEquals(3,c);
    })();
    assertEquals('stuff3', c);
    (function() {
      // var variable shadowing catch variable
      var c = 3;
    })();
    assertEquals('stuff3', c);
    c = 2;
  }
  assertEquals(1,c);
261 262
  (function(a,b,c,e,f) {
    // arguments shadowing argument, let, const, class and var variable
263 264 265 266
    a = 2;
    b = 2;
    c = 2;
    e = 2;
267
    f = 2;
268 269 270 271
    assertEquals(2,a);
    assertEquals(2,b);
    assertEquals(2,c);
    assertEquals(2,e);
272
    assertEquals(2,f);
273 274 275 276 277 278 279 280
    // var variable shadowing var variable
    var d = 2;
  })(1,1);
  assertEquals(1,a);
  assertEquals(1,b);
  assertEquals(1,c);
  assertEquals(1,d);
  assertEquals(1,e);
281
  assertEquals(1,f.foo());
282 283 284 285 286 287 288 289 290 291
}
f7(1);


// Ensure let and const variables are block local
// and var variables function local.
function f8() {
  var let_accessors = [];
  var var_accessors = [];
  var const_accessors = [];
292
  var class_accessors = [];
293 294 295 296
  for (var i = 0; i < 10; i++) {
    let x = i;
    var y = i;
    const z = i;
297
    class a { static foo() { return x; } }
298 299 300
    let_accessors[i] = function() { return x; }
    var_accessors[i] = function() { return y; }
    const_accessors[i] = function() { return z; }
301
    class_accessors[i] = function() { return a; }
302 303 304 305 306 307
  }
  for (var j = 0; j < 10; j++) {
    y = j + 10;
    assertEquals(j, let_accessors[j]());
    assertEquals(y, var_accessors[j]());
    assertEquals(j, const_accessors[j]());
308
    assertEquals(j, class_accessors[j]().foo());
309 310 311
  }
}
f8();