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![Alexander Markov](/assets/img/avatar_default.png)
TEST=ci Change-Id: Iffe90eca5b84f76ec2a1d22a31939b51f726909b Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/235862 Reviewed-by: Ryan Macnak <rmacnak@google.com> Commit-Queue: Alexander Markov <alexmarkov@google.com>
110 lines
3.8 KiB
C++
110 lines
3.8 KiB
C++
// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#include "vm/scopes.h"
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#include "platform/assert.h"
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#include "vm/unit_test.h"
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namespace dart {
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ISOLATE_UNIT_TEST_CASE(LocalScope) {
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// Allocate a couple of local variables first.
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const Type& dynamic_type = Type::ZoneHandle(Type::DynamicType());
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const String& a = String::ZoneHandle(Symbols::New(thread, "a"));
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LocalVariable* var_a = new LocalVariable(
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TokenPosition::kNoSource, TokenPosition::kNoSource, a, dynamic_type);
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LocalVariable* inner_var_a = new LocalVariable(
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TokenPosition::kNoSource, TokenPosition::kNoSource, a, dynamic_type);
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const String& b = String::ZoneHandle(Symbols::New(thread, "b"));
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LocalVariable* var_b = new LocalVariable(
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TokenPosition::kNoSource, TokenPosition::kNoSource, b, dynamic_type);
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const String& c = String::ZoneHandle(Symbols::New(thread, "c"));
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LocalVariable* var_c = new LocalVariable(
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TokenPosition::kNoSource, TokenPosition::kNoSource, c, dynamic_type);
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LocalScope* outer_scope = new LocalScope(NULL, 0, 0);
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LocalScope* inner_scope1 = new LocalScope(outer_scope, 0, 0);
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LocalScope* inner_scope2 = new LocalScope(outer_scope, 0, 0);
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EXPECT(outer_scope->parent() == NULL);
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EXPECT_EQ(outer_scope, inner_scope1->parent());
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EXPECT_EQ(outer_scope, inner_scope2->parent());
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EXPECT_EQ(inner_scope2, outer_scope->child());
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EXPECT_EQ(inner_scope1, inner_scope2->sibling());
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EXPECT(inner_scope1->child() == NULL);
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EXPECT(inner_scope2->child() == NULL);
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// Populate the local scopes as follows:
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// { // outer_scope
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// var a;
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// { // inner_scope1
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// var b;
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// }
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// L: { // inner_scope2
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// var c;
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// }
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// }
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EXPECT(outer_scope->AddVariable(var_a));
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EXPECT(inner_scope1->AddVariable(var_b));
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EXPECT(inner_scope2->AddVariable(var_c));
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EXPECT(!outer_scope->AddVariable(var_a));
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// Check the simple layout above.
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EXPECT_EQ(var_a, outer_scope->LocalLookupVariable(a));
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EXPECT_EQ(var_a, inner_scope1->LookupVariable(a, true));
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EXPECT(outer_scope->LocalLookupVariable(b) == NULL);
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EXPECT(inner_scope1->LocalLookupVariable(c) == NULL);
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// Modify the local scopes to contain shadowing:
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// { // outer_scope
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// var a;
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// { // inner_scope1
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// var b;
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// var a; // inner_var_a
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// }
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// { // inner_scope2
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// var c;
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// L: ...
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// }
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// }
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EXPECT(inner_scope1->AddVariable(inner_var_a));
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EXPECT_EQ(inner_var_a, inner_scope1->LookupVariable(a, true));
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EXPECT(inner_scope1->LookupVariable(a, true) != var_a);
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// Modify the local scopes with access of an outer scope variable:
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// { // outer_scope
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// var a;
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// { // inner_scope1
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// var b;
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// var a; // inner_var_a
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// }
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// { // inner_scope2
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// var c = a;
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// L: ...
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// }
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// }
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EXPECT(inner_scope2->LocalLookupVariable(a) == NULL);
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EXPECT(inner_scope2->AddVariable(var_a));
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EXPECT_EQ(var_a, inner_scope2->LocalLookupVariable(a));
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EXPECT_EQ(1, outer_scope->num_variables());
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EXPECT_EQ(2, inner_scope1->num_variables());
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EXPECT_EQ(2, inner_scope2->num_variables());
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// Cannot depend on the order, but we should find the variables.
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EXPECT(outer_scope->VariableAt(0) == var_a);
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EXPECT((inner_scope1->VariableAt(0) == inner_var_a) ||
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(inner_scope1->VariableAt(1) == inner_var_a));
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EXPECT((inner_scope1->VariableAt(0) == var_b) ||
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(inner_scope1->VariableAt(1) == var_b));
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EXPECT((inner_scope2->VariableAt(0) == var_a) ||
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(inner_scope2->VariableAt(1) == var_a) ||
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(inner_scope2->VariableAt(2) == var_a));
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EXPECT((inner_scope2->VariableAt(0) == var_c) ||
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(inner_scope2->VariableAt(1) == var_c) ||
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(inner_scope2->VariableAt(2) == var_c));
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}
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} // namespace dart
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