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Control flow based type guards#6959

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ivogabe wants to merge 67 commits intomicrosoft:mastermicrosoft/TypeScript:masterfrom ivogabe:guardsivogabe/TypeScript:guardsCopy head branch name to clipboard

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Commits on Aug 15, 2015

• Merge remote-tracking branch 'Microsoft/master'

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Commits on Aug 19, 2015

• Merge remote-tracking branch 'Microsoft/master'

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Commits on Nov 18, 2015

• Merge branch 'master' of https://github.com/Microsoft/TypeScript

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Commits on Nov 30, 2015

• Merge remote-tracking branch 'Microsoft/master' into guards

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Commits on Dec 4, 2015

• Add flow markers to binder

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• Add BranchFlow for type guards

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Commits on Dec 6, 2015

• Add caching of identifier narrowing in binder

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• Implement flow based type guards in checker

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Commits on Dec 9, 2015

• Narrow assignments to unions only

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• Make isDeclarationName a weak type guard for Identifiers

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• Remove trailing space

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• Make getNarrowedTypeOfSymbol work on all nodes again

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• Merge remote-tracking branch 'Microsoft/master' into guards

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Commits on Dec 11, 2015

• Merge remote-tracking branch 'Microsoft/master' into guards

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Commits on Feb 6, 2016

• Bind flow of loops and named labels

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  905a240

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• Fix flow based type guards in checker

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• Merge remote-tracking branch 'Microsoft/master' into guards

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• Fix errors after merge

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• Remove restriction on type narrowing with assignments in loops

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• Fix assignment checking

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Commits on Feb 8, 2016

• Remove flowIndex, use getNodeId

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• Remove PreviousOccurency interface

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  ff1b2d6

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• Fix typo

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• Merge remote-tracking branch 'Microsoft/master' into guards

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  7d2daf9

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• Fix binding of condition less for statement

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Commits on Feb 11, 2016

• Handle narrowing in var declarations

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• Rename showError to reportError

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• Merge remote-tracking branch 'Microsoft/master' into guards

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• Fix typos after merge

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• Merge master

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Commits on Feb 12, 2016

• Remove old assertion

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  ac2f547

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• Keep narrowed types in a loop

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• Merge remote-tracking branch 'Microsoft/master' into guards

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Commits on Feb 13, 2016

• Fix narrowing of union type assigned to a union type

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• Merge remote-tracking branch 'Microsoft/master' into guards

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Commits on Feb 26, 2016

• Merge remote-tracking branch 'Microsoft/master' into guards

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• Add more caching

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• Use cache to speed up multiple paths to same node in flow graph

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Commits on Feb 29, 2016

• Don't error when assigning to narrowed variable using destructuring

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• Merge remote-tracking branch 'Microsoft/master' into guards

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Commits on Mar 7, 2016

• Narrow after destructuring assignment

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Commits on Mar 9, 2016

• Rewrite recursion to loop, reduces check time

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Commits on Mar 11, 2016

• Merge remote-tracking branch 'Microsoft/master' into guards

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Commits on Mar 12, 2016

• Fix issues with destructuring assignments

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Commits on Mar 13, 2016

• Merge remote-tracking branch 'Microsoft/master' into guards

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• Fix narrowing of JSX tags

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Commits on Mar 14, 2016

• Use initial type when narrowing resulted in empty type

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• Move narrowing info from node to NodeLinks

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• Allow narrowing in nested functions

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Commits on Mar 15, 2016

• Narrow after destructuring assignments with initializers

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• Merge remote-tracking branch 'Microsoft/master' into guards

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  fa77df5

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• Fix narrowing in for of statement

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  46786b3

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• Stop narrowing with guards that contain assignments

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• Add control flow tests

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  b9f5b79

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• Add test for narrowing after assignment

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• Modify existing tests for new type guards behavior

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Commits on Mar 16, 2016

• Add more tests

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  f8a1827

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• Remove redundant bindFlowMarker calls

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  7cceb0c

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• Fix tests

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• Accept baseline

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• Merge remote-tracking branch 'Microsoft/master' into guards

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  9e13d0f

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• Update tests

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Commits on Mar 22, 2016

• Merge remote-tracking branch 'Microsoft/master' into guards

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Commits on Mar 23, 2016

• Implement flow based type guards for this expression and dotted names

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  90a678d

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• Fix unresolved symbols, wrong caching and empty type issues

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  7646af1

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• Accept new baselines

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  4a76fe2

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• Stop narrowing of dotted name after assignment of parent type

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