Implement new Function.prototype.toString --harmony-function-tostring

For functions declared in source code, the .toString() representation
will be an excerpt of the source code.
* For functions declared with the "function" keyword, the excerpt
  starts at the "function" or "async" keyword and ends at the final "}".
  The previous behavior would start the excerpt at the "(" of the
  parameter list, and prepend a canonical `"function " + name` or
  similar, which would discard comments and formatting surrounding the
  function's name. Anonymous functions declared as function expressions
  no longer get the name "anonymous" in their toString representation.
* For methods, the excerpt starts at the "get", "set", "*" (for
  generator methods), or property name, whichever comes first.
  Previously, the toString representation for methods would use a
  canonical prefix before the "(" of the parameter list. Note that any
  "static" keyword is omitted.
* For arrow functions and class declarations, the excerpt is unchanged.

For functions created with the Function, GeneratorFunction, or
AsyncFunction constructors:
* The string separating the parameter text and body text is now
  "\n) {\n", where previously it was "\n/*``*/) {\n" or ") {\n".
* At one point, newline normalization was required by the spec here,
  but that was removed from the spec, and so this CL does not do it.

Included in this CL is a fix for CreateDynamicFunction parsing. ')'
and '`' characters in the parameter string are no longer disallowed,
and Function("a=function(", "}){") is no longer allowed.

BUG=v8:4958, v8:4230

Review-Url: https://codereview.chromium.org/2156303002
Cr-Commit-Position: refs/heads/master@{#43262}
24 files changed
tree: 5f8f70c64dd934359f0ccd7f028cf5411f87863c
  1. .clang-format
  2. .gitignore
  3. .gn
  4. .ycm_extra_conf.py
  5. AUTHORS
  6. BUILD.gn
  7. CODE_OF_CONDUCT.md
  8. ChangeLog
  9. DEPS
  10. LICENSE
  11. LICENSE.fdlibm
  12. LICENSE.strongtalk
  13. LICENSE.v8
  14. LICENSE.valgrind
  15. Makefile
  16. Makefile.android
  17. OWNERS
  18. PRESUBMIT.py
  19. README.md
  20. WATCHLISTS
  21. benchmarks/
  22. build_overrides/
  23. codereview.settings
  24. docs/
  25. gni/
  26. gypfiles/
  27. include/
  28. infra/
  29. samples/
  30. snapshot_toolchain.gni
  31. src/
  32. test/
  33. testing/
  34. third_party/
  35. tools/
README.md

V8 JavaScript Engine

V8 is Google's open source JavaScript engine.

V8 implements ECMAScript as specified in ECMA-262.

V8 is written in C++ and is used in Google Chrome, the open source browser from Google.

V8 can run standalone, or can be embedded into any C++ application.

V8 Project page: https://github.com/v8/v8/wiki

Getting the Code

Checkout depot tools, and run

    fetch v8

This will checkout V8 into the directory v8 and fetch all of its dependencies. To stay up to date, run

    git pull origin
    gclient sync

For fetching all branches, add the following into your remote configuration in .git/config:

    fetch = +refs/branch-heads/*:refs/remotes/branch-heads/*
    fetch = +refs/tags/*:refs/tags/*

Contributing

Please follow the instructions mentioned on the V8 wiki.