95145fa826
This patch moves the semantics of 'const' in sloppy mode to match those in strict mode, that is, const makes lexical (let-like) bindings, must have an initializer, and does not create properties of the global object. R=adamk LOG=Y BUG=v8:3305 CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_chromium_rel_ng;tryserver.blink:linux_blink_rel Review URL: https://codereview.chromium.org/1571873004 Cr-Commit-Position: refs/heads/master@{#33218}
125 lines
4.1 KiB
C++
125 lines
4.1 KiB
C++
// Copyright 2014 the V8 project authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file.
|
|
|
|
#include "test/cctest/compiler/function-tester.h"
|
|
|
|
namespace v8 {
|
|
namespace internal {
|
|
namespace compiler {
|
|
|
|
static const char* throws = NULL;
|
|
|
|
static const char* load_tests[] = {
|
|
"var x = a; r = x", "123", "0",
|
|
"var x = (r = x)", "undefined", "undefined",
|
|
"var x = (a?1:2); r = x", "1", "2",
|
|
"const x = a; r = x", "123", "0",
|
|
"const x = (r = x)", "undefined", "undefined",
|
|
"const x = (a?3:4); r = x", "3", "4",
|
|
"'use strict'; const x = a; r = x", "123", "0",
|
|
"'use strict'; const x = (r = x)", throws, throws,
|
|
"'use strict'; const x = (a?5:6); r = x", "5", "6",
|
|
"'use strict'; let x = a; r = x", "123", "0",
|
|
"'use strict'; let x = (r = x)", throws, throws,
|
|
"'use strict'; let x = (a?7:8); r = x", "7", "8",
|
|
NULL};
|
|
|
|
static const char* store_tests[] = {
|
|
"var x = 1; x = a; r = x", "123", "0",
|
|
"var x = (a?(x=4,2):3); r = x", "2", "3",
|
|
"var x = (a?4:5); x = a; r = x", "123", "0",
|
|
"const x = 1; x = a; r = x", "1", "1",
|
|
"const x = (a?(x=4,2):3); r = x", "2", "3",
|
|
"const x = (a?4:5); x = a; r = x", "4", "5",
|
|
// Assignments to 'const' are SyntaxErrors, handled by the parser,
|
|
// hence we cannot test them here because they are early errors.
|
|
"'use strict'; let x = 1; x = a; r = x", "123", "0",
|
|
"'use strict'; let x = (a?(x=4,2):3); r = x", throws, "3",
|
|
"'use strict'; let x = (a?4:5); x = a; r = x", "123", "0",
|
|
NULL};
|
|
|
|
static const char* bind_tests[] = {
|
|
"if (a) { const x = a }; r = x;", "123", "undefined",
|
|
"for (; a > 0; a--) { const x = a }; r = x", "123", "undefined",
|
|
// Re-initialization of variables other than legacy 'const' is not
|
|
// possible due to sane variable scoping, hence no tests here.
|
|
NULL};
|
|
|
|
|
|
static void RunVariableTests(const char* source, const char* tests[]) {
|
|
i::FLAG_legacy_const = true;
|
|
EmbeddedVector<char, 512> buffer;
|
|
|
|
for (int i = 0; tests[i] != NULL; i += 3) {
|
|
SNPrintF(buffer, source, tests[i]);
|
|
PrintF("#%d: %s\n", i / 3, buffer.start());
|
|
FunctionTester T(buffer.start());
|
|
|
|
// Check function with non-falsey parameter.
|
|
if (tests[i + 1] != throws) {
|
|
Handle<Object> r = v8::Utils::OpenHandle(*CompileRun(tests[i + 1]));
|
|
T.CheckCall(r, T.Val(123), T.Val("result"));
|
|
} else {
|
|
T.CheckThrows(T.Val(123), T.Val("result"));
|
|
}
|
|
|
|
// Check function with falsey parameter.
|
|
if (tests[i + 2] != throws) {
|
|
Handle<Object> r = v8::Utils::OpenHandle(*CompileRun(tests[i + 2]));
|
|
T.CheckCall(r, T.Val(0.0), T.Val("result"));
|
|
} else {
|
|
T.CheckThrows(T.Val(0.0), T.Val("result"));
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
TEST(StackLoadVariables) {
|
|
const char* source = "(function(a,r) { %s; return r; })";
|
|
RunVariableTests(source, load_tests);
|
|
}
|
|
|
|
|
|
TEST(ContextLoadVariables) {
|
|
const char* source = "(function(a,r) { %s; function f() {x} return r; })";
|
|
RunVariableTests(source, load_tests);
|
|
}
|
|
|
|
|
|
TEST(StackStoreVariables) {
|
|
const char* source = "(function(a,r) { %s; return r; })";
|
|
RunVariableTests(source, store_tests);
|
|
}
|
|
|
|
|
|
TEST(ContextStoreVariables) {
|
|
const char* source = "(function(a,r) { %s; function f() {x} return r; })";
|
|
RunVariableTests(source, store_tests);
|
|
}
|
|
|
|
|
|
TEST(StackInitializeVariables) {
|
|
const char* source = "(function(a,r) { %s; return r; })";
|
|
RunVariableTests(source, bind_tests);
|
|
}
|
|
|
|
|
|
TEST(ContextInitializeVariables) {
|
|
const char* source = "(function(a,r) { %s; function f() {x} return r; })";
|
|
RunVariableTests(source, bind_tests);
|
|
}
|
|
|
|
|
|
TEST(SelfReferenceVariable) {
|
|
FunctionTester T("(function self() { return self; })");
|
|
|
|
T.CheckCall(T.function);
|
|
CompileRun("var self = 'not a function'");
|
|
T.CheckCall(T.function);
|
|
}
|
|
|
|
} // namespace compiler
|
|
} // namespace internal
|
|
} // namespace v8
|