caba112d03
Now we - always set .result to undefined before a visited loop and switch since we can't know whether they will set a value, - only visit finally if it can break/continue; and only store/restore .result in that case BUG= Review-Url: https://codereview.chromium.org/2427253003 Cr-Commit-Position: refs/heads/master@{#40542}
156 lines
6.4 KiB
JavaScript
156 lines
6.4 KiB
JavaScript
// Copyright 2015 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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function assertUndef(x) {
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assertEquals(undefined, x);
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}
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// IfStatement [13.6.7]
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assertUndef(eval('42; if (true) ; else 0;')); // ES5: 42
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assertUndef(eval('42; if (true) ;')); // ES5: 42
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assertUndef(eval('42; if (false) 0;')); // ES5: 42
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assertEquals(1, eval('42; if (true) 1;'));
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assertEquals(1, eval('42; if (true) 1; else 0;'));
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assertEquals(0, eval('42; if (false) 1; else 0;'));
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// IterationStatement [13.7]
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assertUndef(eval('42; do ; while (false);')); // ES5: 42
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assertUndef(eval('42; var x = 1; do ; while (x--);')); // ES5: 42
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assertUndef(eval('42; while (false) 0;')); // ES5: 42
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assertUndef(eval('42; while (true) break;')); // ES5: 42
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assertUndef(eval('42; bla: while (true) break bla;')); // ES5: 42
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assertUndef(eval('42; var x = 1; while (x--) ;')); // ES5: 42
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assertUndef(eval('42; for (; false; ) 0;')); // ES5: 42
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assertUndef(eval('42; for (var x = 1; x; x--) ;')); // ES5: 42
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assertUndef(eval('42; for (var x in ["foo", "bar"]) ;'));
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assertUndef(eval('42; for (var x of ["foo", "bar"]) ;'));
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assertUndef(eval('42; for (let x = 1; x; x--) ;'));
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assertUndef(eval('42; for (let x in ["foo", "bar"]) ;'));
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assertUndef(eval('42; for (let x of ["foo", "bar"]) ;'));
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assertUndef(eval('42; for (const x in ["foo", "bar"]) ;'));
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assertUndef(eval('42; for (const x of ["foo", "bar"]) ;'));
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assertEquals(1, eval('42; var x = 10; do x--; while (x);'));
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assertEquals(1, eval('42; var x = 10; while (x) x--;'));
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assertEquals(1, eval('42; for (var x = 10; x; x--) x;'));
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assertEquals(1, eval('42; for (var x = 10; x; --x) x;'));
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assertEquals(1, eval('42; for (let x = 10; x; --x) x;'));
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assertEquals(1, eval('42; var y = 2; for (var x in ["foo", "bar"]) y--;'));
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assertEquals(1, eval('42; var y = 2; for (const x in ["foo", "bar"]) y--;'));
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assertEquals(1, eval('42; var y = 2; for (let x in ["foo", "bar"]) y--;'));
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assertEquals(1, eval('42; var y = 2; for (var x of ["foo", "bar"]) y--;'));
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assertEquals(1, eval('42; var y = 2; for (const x of ["foo", "bar"]) y--;'));
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assertEquals(1, eval('42; var y = 2; for (let x of ["foo", "bar"]) y--;'));
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// WithStatement [13.11.7]
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assertUndef(eval('42; with ({}) ;')); // ES5: 42
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assertEquals(1, eval('42; with ({}) 1;'));
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// SwitchStatement [13.12.11]
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assertUndef(eval('42; switch (0) {};')); // ES5: 42
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assertUndef(eval('42; switch (0) { case 1: 1; };')); // ES5: 42
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assertUndef(eval('42; switch (0) { case 0: ; };')); // ES5: 42
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assertUndef(eval('42; switch (0) { default: ; };')); // ES5: 42
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assertUndef(eval('42; switch (0) { case 0: break; }')); // ES5: 42
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assertEquals(1, eval('42; switch (0) { case 0: 1; }'));
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assertEquals(1, eval('42; switch (0) { case 0: 1; break; }'));
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assertEquals(1, eval('42; switch (0) { case 0: 1; case 666: break; }'));
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assertEquals(2, eval('42; switch (0) { case 0: 1; case 666: 2; break; }'));
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// TryStatement [13.15.8]
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assertUndef(eval('42; try { } catch(e) { };')); // ES5: 42
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assertUndef(eval('42; try { } catch(e) { 0; };')); // ES5: 42
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assertUndef(eval('42; try { throw "" } catch(e) { };')); // ES5: 42
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assertUndef(eval('42; try { throw "" } catch(e) { } finally { };')); // ES5: 42
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assertUndef(eval('42; try { } finally { 666 };')); // ES5: 42
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// Some combinations
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assertUndef(eval('42; switch (0) { case 0: if (true) break; }')); // ES5: 42
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assertUndef(eval('42; switch (0) { case 0: 1; if (true) ; }')); // ES5: 1
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assertUndef(eval('42; switch (0) { case 0: 1; try { break } catch(e) { }; }')); // ES5: 1
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assertEquals(0, eval('42; switch (0) { case 0: 0; case 1: break; }'));
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assertEquals(0, eval('42; while (1) { 0; break; }'))
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assertEquals(0, eval('42; bla: while (1) { 0; break bla; }'))
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assertEquals(0, eval('42; while (1) { with ({}) { 0; break; } }'))
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assertEquals(0, eval('42; while (1) { try { 0; break } catch(e) {666} }'))
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assertEquals(0, eval(
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'42; while (1) { try { 0; break } catch(e) {666} finally {666} }'))
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assertEquals(0, eval(
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'42; while (1) { try { throw "" } catch(e) {666} finally {0; break} }'))
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assertEquals(0, eval(
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'42; while (1) { try { throw "" } catch(e) {0; break} finally {666} }'))
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assertEquals(0, eval(
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'42; while (1) { try { 666 } finally {0; break} }'));
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assertEquals(0, eval(
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'42; while (1) { try { 666; break } finally {0; break} }'));
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assertEquals(0, eval(
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'42; lab: try { 666; break lab } finally {0; break lab}'));
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assertEquals(undefined, eval(
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'var b = 1; ' +
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'outer: while (1) { while (1) { if (b--) 42; else break outer; }; 666 }'));
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// The following is not what ES6 says, but see ES bug 4540.
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assertUndef(eval('42; switch (0) { case 0: 1; if (true) break; }')); // ES5: 1
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////////////////////////////////////////////////////////////////////////////////
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//
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// The following are copied from webkit/eval-throw-return and adapted.
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function throwFunc() {
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throw "";
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}
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function throwOnReturn(){
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1;
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return throwFunc();
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}
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function twoFunc() {
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2;
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}
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assertEquals(1, eval("1;"));
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assertUndef(eval("1; try { foo = [2,3,throwFunc(), 4]; } catch (e){}"));
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assertUndef(eval("1; try { 2; throw ''; } catch (e){}"));
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assertUndef(eval("1; try { 2; throwFunc(); } catch (e){}"));
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assertEquals(3, eval("1; try { 2; throwFunc(); } catch (e){3;} finally {}"));
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assertEquals(3, eval("1; try { 2; throwFunc(); } catch (e){3;} finally {4;}"));
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assertUndef(eval("function blah() { 1; }; blah();"));
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assertUndef(eval("var x = 1;"));
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assertEquals(1, eval("if (true) { 1; } else { 2; }"));
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assertEquals(2, eval("if (false) { 1; } else { 2; }"));
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assertUndef(eval("try{1; if (true) { 2; throw ''; } else { 2; }} catch(e){}"));
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assertEquals(2, eval("1; var i = 0; do { ++i; 2; } while(i!=1);"));
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assertUndef(eval(
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"try{1; var i = 0; do { ++i; 2; throw ''; } while (i!=1);} catch(e){}"));
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assertUndef(eval("1; try{2; throwOnReturn();} catch(e){}"));
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assertUndef(eval("1; twoFunc();"));
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assertEquals(2, eval("1; with ( { a: 0 } ) { 2; }"));
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assertUndef(eval('a: while(true) { do { 0 } while(false); switch(1) { case 0: 1; case 1: break a; }; 0 }'));
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assertUndef(eval('a: while(true) { do { 0 } while(false); try {} finally { break a }; 0 }'));
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assertUndef(eval('a: while(true) { b: while(true) { 0; break b; }; switch(1) { case 1: break a; }; 2 }'));
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assertUndef(eval('a: while(true) { b: while(true) { 0; break b; }; while (true) { break a; }; 2 }'));
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assertUndef(eval('while (true) { 20; a:{ break a; } with ({}) break; 30; }'));
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assertEquals(42, eval('a: while(true) { switch(0) { case 0: 42; case 1: break a; }; 33 }'));
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