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Unified Diff: src/parser.cc

Issue 1421193006: Revert of Revert "Revert of [es6] Implement destructuring binding in try/catch" (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: Created 5 years, 1 month ago
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Index: src/parser.cc
diff --git a/src/parser.cc b/src/parser.cc
index 31623c2ae279aa365fb44db85efb760b507aa018..3adaff8e89fdf45dcc4d122d839577b119941871 100644
--- a/src/parser.cc
+++ b/src/parser.cc
@@ -1073,8 +1073,7 @@
// unchanged if the property already exists.
InsertSloppyBlockFunctionVarBindings(scope, &ok);
}
- if (ok && (is_strict(language_mode()) || allow_harmony_sloppy() ||
- allow_harmony_destructuring())) {
+ if (ok && (is_strict(language_mode()) || allow_harmony_sloppy())) {
CheckConflictingVarDeclarations(scope_, &ok);
}
@@ -3158,79 +3157,21 @@
Scope* catch_scope = NULL;
Variable* catch_variable = NULL;
Block* catch_block = NULL;
+ const AstRawString* name = NULL;
if (tok == Token::CATCH) {
Consume(Token::CATCH);
Expect(Token::LPAREN, CHECK_OK);
catch_scope = NewScope(scope_, CATCH_SCOPE);
catch_scope->set_start_position(scanner()->location().beg_pos);
-
- ExpressionClassifier pattern_classifier;
- Expression* pattern = ParsePrimaryExpression(&pattern_classifier, CHECK_OK);
- ValidateBindingPattern(&pattern_classifier, CHECK_OK);
-
- const AstRawString* name = ast_value_factory()->dot_catch_string();
- bool is_simple = pattern->IsVariableProxy();
- if (is_simple) {
- auto proxy = pattern->AsVariableProxy();
- scope_->RemoveUnresolved(proxy);
- name = proxy->raw_name();
- }
+ name = ParseIdentifier(kDontAllowRestrictedIdentifiers, CHECK_OK);
+
+ Expect(Token::RPAREN, CHECK_OK);
catch_variable = catch_scope->DeclareLocal(name, VAR, kCreatedInitialized,
Variable::NORMAL);
-
- Expect(Token::RPAREN, CHECK_OK);
-
- {
- BlockState block_state(&scope_, catch_scope);
-
- // TODO(adamk): Make a version of ParseScopedBlock that takes a scope and
- // a block.
- catch_block =
- factory()->NewBlock(nullptr, 16, false, RelocInfo::kNoPosition);
- Scope* block_scope = NewScope(scope_, BLOCK_SCOPE);
-
- block_scope->set_start_position(scanner()->location().beg_pos);
- {
- BlockState block_state(&scope_, block_scope);
- Target target(&this->target_stack_, catch_block);
-
- if (!is_simple) {
- DeclarationDescriptor descriptor;
- descriptor.declaration_kind = DeclarationDescriptor::NORMAL;
- descriptor.parser = this;
- descriptor.declaration_scope = scope_;
- descriptor.scope = scope_;
- descriptor.hoist_scope = nullptr;
- descriptor.mode = LET;
- descriptor.is_const = false;
- descriptor.needs_init = true;
- descriptor.declaration_pos = pattern->position();
- descriptor.initialization_pos = pattern->position();
- descriptor.init_op = Token::INIT_LET;
-
- DeclarationParsingResult::Declaration decl(
- pattern, pattern->position(),
- factory()->NewVariableProxy(catch_variable));
-
- PatternRewriter::DeclareAndInitializeVariables(
- catch_block, &descriptor, &decl, nullptr, CHECK_OK);
- }
-
- Expect(Token::LBRACE, CHECK_OK);
- while (peek() != Token::RBRACE) {
- Statement* stat = ParseStatementListItem(CHECK_OK);
- if (stat && !stat->IsEmpty()) {
- catch_block->statements()->Add(stat, zone());
- }
- }
- Consume(Token::RBRACE);
- }
- block_scope->set_end_position(scanner()->location().end_pos);
- block_scope = block_scope->FinalizeBlockScope();
- catch_block->set_scope(block_scope);
- }
+ BlockState block_state(&scope_, catch_scope);
+ catch_block = ParseBlock(NULL, CHECK_OK);
catch_scope->set_end_position(scanner()->location().end_pos);
tok = peek();
@@ -4432,8 +4373,7 @@
if (is_sloppy(language_mode) && allow_harmony_sloppy_function()) {
InsertSloppyBlockFunctionVarBindings(scope, CHECK_OK);
}
- if (is_strict(language_mode) || allow_harmony_sloppy() ||
- allow_harmony_destructuring()) {
+ if (is_strict(language_mode) || allow_harmony_sloppy()) {
CheckConflictingVarDeclarations(scope, CHECK_OK);
}
}
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