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Author SHA1 Message Date
Zenong ZhangandJon Ross-Perkins b28fd7ebc9 Implement more flows on unformed static analysis (#1923) 
- Added detection of unformed usage with `return var`, control-flow statements and member access.
- Refactored the work flow: made flow facts a class and moved operations of flow facts into the class.
- Added, cleaned and renamed test cases. Some test cases for the dynamic unformed check were suppressed by the static check. They are now added back.

Co-authored-by: Jon Ross-Perkins <jperkins@google.com>
 2022-08-15 10:53:42 -07:00
pmqttm newGeoff RomerRichard Smith
 		f754373786 For loop for arrays (#1753) 
Co-authored-by: m new <michael.burzan@outlook.de>
Co-authored-by: Geoff Romer <gromer@google.com>
Co-authored-by: Richard Smith <richard@metafoo.co.uk>
 2022-08-09 15:34:24 -07:00
Zenong Zhang 2f4905bf70 Implement static analysis of unformed usage on local variables. (#1831) 
- An introprocedural forward analysis that checks the may-be-formed states on local variables.
 - Returns compilation error on usage of must-be-unformed variables. 
 - Implemented as a pass of `ASTNode` traversal. 
 - Currently supports detection of: function parameter, return expression and rhs of assign.
 2022-08-03 15:28:51 -07:00