528eb97b3a
the parser in preparation for not using the optimizer when using the full codegen. Code covered by existing tests. Review URL: http://codereview.chromium.org/3141034 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@5321 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
112 lines
4.0 KiB
C++
112 lines
4.0 KiB
C++
// Copyright 2006-2009 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#ifndef V8_FUNC_NAME_INFERRER_H_
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#define V8_FUNC_NAME_INFERRER_H_
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namespace v8 {
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namespace internal {
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// FuncNameInferrer is a stateful class that is used to perform name
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// inference for anonymous functions during static analysis of source code.
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// Inference is performed in cases when an anonymous function is assigned
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// to a variable or a property (see test-func-name-inference.cc for examples.)
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//
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// The basic idea is that during parsing of LHSs of certain expressions
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// (assignments, declarations, object literals) we collect name strings,
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// and during parsing of the RHS, a function literal can be collected. After
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// parsing the RHS we can infer a name for function literals that do not have
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// a name.
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class FuncNameInferrer : public ZoneObject {
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public:
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FuncNameInferrer()
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: entries_stack_(10),
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names_stack_(5),
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funcs_to_infer_(4),
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dot_(Factory::NewStringFromAscii(CStrVector("."))) {
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}
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// Returns whether we have entered name collection state.
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bool IsOpen() const { return !entries_stack_.is_empty(); }
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// Pushes an enclosing the name of enclosing function onto names stack.
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void PushEnclosingName(Handle<String> name);
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// Enters name collection state.
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void Enter() {
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entries_stack_.Add(names_stack_.length());
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}
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// Pushes an encountered name onto names stack when in collection state.
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void PushLiteralName(Handle<String> name);
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void PushVariableName(Handle<String> name);
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// Adds a function to infer name for.
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void AddFunction(FunctionLiteral* func_to_infer) {
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if (IsOpen()) {
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funcs_to_infer_.Add(func_to_infer);
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}
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}
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// Infers a function name and leaves names collection state.
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void Infer() {
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ASSERT(IsOpen());
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if (!funcs_to_infer_.is_empty()) {
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InferFunctionsNames();
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}
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}
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// Infers a function name and leaves names collection state.
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void Leave() {
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ASSERT(IsOpen());
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names_stack_.Rewind(entries_stack_.RemoveLast());
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}
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private:
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// Constructs a full name in dotted notation from gathered names.
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Handle<String> MakeNameFromStack();
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// A helper function for MakeNameFromStack.
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Handle<String> MakeNameFromStackHelper(int pos, Handle<String> prev);
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// Performs name inferring for added functions.
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void InferFunctionsNames();
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ZoneList<int> entries_stack_;
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ZoneList<Handle<String> > names_stack_;
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ZoneList<FunctionLiteral*> funcs_to_infer_;
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Handle<String> dot_;
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DISALLOW_COPY_AND_ASSIGN(FuncNameInferrer);
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};
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} } // namespace v8::internal
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#endif // V8_FUNC_NAME_INFERRER_H_
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