Reviewers: adamk, Dan Ehrenberg,
Description:
[es6] Implement proper TDZ for parameters
Previously, examples like (({a = x}, x) => {})({}, 0) did not throw a
ReferenceError like they should. This CL
- Splits up DeclareFormalParameters such that the formals can be recorded
first
and declared later.
- Declaration then takes the complete parameter list into account. If it is
not
simple, temporaries are introduced for all parameters.
- BuildParameterInitializationBlock desugars all parameters from non-simple
lists into let-bindings.
- Rest is currently handled specially, until rest-via-destructuring has
landed.
[email protected], [email protected]
BUG=v8:811
LOG=N
Please review this at https://codereview.chromium.org/1259283002/
Base URL: https://chromium.googlesource.com/v8/v8.git@master
Affected files (+139, -36 lines):
M src/parser.h
M src/parser.cc
M src/preparser.h
M test/mjsunit/harmony/destructuring.js
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