This CL addresses a code pattern where a method expects its parameter
to have a certain type, but that method is torn off and passed as a
callback to another method expecting its parameter type to be more
general. For example:
void f(int i) { ... }
void g(void callback(Object o)) { ... }
void h() {
g(f); // Error: () -> int is not a subtype of () -> Object
}
This is a strong mode error because the type system cannot guarantee
that the value pased to f will be an int. The solution is to broaden
the type of the callback parameter so that it matches the type
expected for the callback. In most cases, we insert an implicit
downcast (by reassigning the parameter to a local variable with the
expected type), which in Dart 2.0 semantics will result in a runtime
check (similar to what happens in Dart 1.0 checked mode).
Since the downcasts are implicit, the Dart 1.0 semantics are
unchanged, so this should be a safe change.
Change-Id: I9583ea194343b89b39305c9796cfad299a47943f
Reviewed-on: https://dart-review.googlesource.com/55907
Commit-Queue: Paul Berry <paulberry@google.com>
Reviewed-by: Ryan Macnak <rmacnak@google.com>
This includes Fasta, tools and observatory, so the checked-in SDK must
have the lower-case constants.
Change-Id: I8380ad041ad058f7d02ae19caccfecd434d13d75
Reviewed-on: https://dart-review.googlesource.com/50201
Commit-Queue: Lasse R.H. Nielsen <lrn@google.com>
Reviewed-by: Leaf Petersen <leafp@google.com>
- Add LocalVariableAnnotation to script-inset
- Tweak shortName for a closure
- Teach Script how to find local variable locations (not perfect yet)
- Send tokenPos and endTokenPos for debugger local variables
Performance improvements:
- Reduced script-inset update/computeAnnotations calls from 5 to 1 for each stack frame that is opened
R=rmacnak@google.com
Review URL: https://codereview.chromium.org//1126363005
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@45725 260f80e4-7a28-3924-810f-c04153c831b5
TableTree improvements:
- Row's have flex-box divs in each table cell.
- To represent depth in tree a colored vertical bar for each depth level is shown
- Expanding tree nodes is now asynchronous and animates.
- Change cursor during tree expansion.
Observatory Profiler improvements:
- Improved appearance.
- Support for inclusive (main first) call trees.
- Replace tooltip hover with info toggle.
- Visual icon attributes for code, functions and call tree nodes.
- Fetching / Load status display.
- Cleaned up Code and Function kinds.
Profiler improvements:
- When not profiling the VM (--profile-vm) only walk the stack when we are in Dart code or have exited Dart code. This removes some native stack walker noise.
- Build inclusive (main first) call trees and send across service.
Notes for analyzer team:
Analyzer command line:
./out/ReleaseIA32/dart --keep-code --trace-profiler --profile-depth=128 --observe out/ReleaseIA32/dart-sdk/bin/snapshots/dartanalyzer.dart.snapshot --dart-sdk=out/ReleaseIA32/dart-sdk pkg/compiler/lib/src/dart2js.dart
Profiler settings:
- Tags: None or VM
- Mode: Function
- Direction: Bottom up
R=asiva@google.com, rmacnak@google.com
Review URL: https://codereview.chromium.org//965593002
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@44152 260f80e4-7a28-3924-810f-c04153c831b5
Profiler improvements:
- Track Functions in profile and build Function based trie
- Associate code objects with functions
- Created cpu_profile.dart library
- Major speed improvements for disassembly view
- Fix truncation of disassembly comments
- Ability to get code object ticks from disassembly view
- Inlining mini-map in disassembly view.
- Remove a bunch of unused data from profile service response
- In some cases a caller PC that is better than the PC marker is inserted into the stack trace
- Inlined functions are expanded
- Ability to clear profile
- New flag '--keep_code' which keeps deoptimized code around for use by the profiler.
General fixes:
- Fix caching in service library
- Remove pubspec.yaml before running pub get
R=asiva@google.com, rmacnak@google.com
Review URL: https://codereview.chromium.org//928833003
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@44067 260f80e4-7a28-3924-810f-c04153c831b5
Paul Berry