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Specify null safety#2605

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eernstg wants to merge 89 commits intomaindart-lang/language:mainfrom specify_null_safety_sep21dart-lang/language:specify_null_safety_sep21Copy head branch name to clipboard

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Commits on Feb 14, 2025

• Rebasing

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• Typos: Escaping braces meant to be code

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• Eliminated text about migration features, adapted the remaining text to preserve the meaning for all null-safety features

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• Rebasing

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• Reorganized material on null/Null

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• WIP

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• Corrected last part of section Variables

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• Did expression typing, spread element, i2b

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• Super-bounded types, least and greatest closure

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• Assignability, generics

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• Extreme types

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• Extreme types, helper functions

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• Rebase

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• .call insertion on nullable type; clean up BlindDefineSymbol

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• Main

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• Type Type

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• Type Type fixes

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• More typeType fixes

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• Constant instances (in particular: about canonical instances)

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• Corrected variable initialization specification ("has been stored" rather than "first execution of getter/setter")

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• Small adjustments to Variables

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• Rebase

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• Boolean conversion; type test; made true/false terminology consistent with Object terminology

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• Constant types; type variable elimination in constants

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• Conditional expression; operators && and ||; if statements; delete old section about promotion

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• Integrate Null Promotion; put v==null rules into Type Promotion, and fill in enough commentary to make that section make sense

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• Null shorting

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• Small fixes in section Null Shorting

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• Revisiting all occurrences of \NULL/Null/null

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• Did much of Standard ... Bounds

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• Standard bounds

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• Fixed the "SUB issues" section

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• Rebase

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• Clarified and corrected Canonical Syntax

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• Fixed subsubsection --> subsection, 2*

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• Typos

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• Whitespace

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• Interface type fixes

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• Sync with specify_null_safety_new_sections_dec21

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• Mark a subtype rule as redundant, in a TODO comment

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• Adjust no-loops-in-noSuchMethod example

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• Adjust no-loops-in-noSuchMethod example

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• Corrected function type subtype rule (bounds); corrected "math" index entries

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• Adjust class building types

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• Adjust examples declaring non-nullable positional optional parameters with no default

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• Add a TODO to introduce Any

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• Correct example in section about super-bounded types

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• Correction based on #2679

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• Specify erasure of intersection types for the semantics of await expressions

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• Typo

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• Introduce \DynamicError, marking all dynamic errors just like compile-time errors have been for a while

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• Changed the error margin markers to use red text

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• Correct dynamic type of tear-off with covariant parameter

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• Clarified tear-offs of methods with covariant parameters

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• Correct a typo about closurization

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• Correction: Add definition of normalizedType/topMergeType for member signatures

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• Correction: Update dynamic type of covariant parameter to Object?

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• Typo

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• Add commentary to emphasize that new/const can be implicit, and new/const C<T>() is still an error when C<T> is super-bounded

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• Add missing updates in section typeVoid

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• Add missing error: default values must be type correct

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• Add a paragraph explaining that the given section is about both optional and named parameters, not just parameters that are both

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• Post-rebase error correction

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• Correct usages of "final variable" and "constant variable"

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• Add missing declaration kind about getter/setter type error

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• Remove obsolete reference to "mixin composition" from section Superclasses

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• Add comment about default values of noSuchMethod forwarders being underspecified

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• Correct rule about the interface of T?

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• Correct rule about interfaces of bounded types

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• Corrected many occurrences of "string" to "string literal"

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• Update the "parameter name _..." error

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• Restore the index marker, define a command for it

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• Corrected the huge rebase operation (removed TODO material)

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• Fix obsolete ref

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• Introduce <memberedDeclarationBody> and use it

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• Add change log entry

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• WIP

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• Clarified class building types

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• Correct the order of "bind formals to actuals", which has been rather mixed until now

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• Correct the incorrect cleam that Null implements Object

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Commits on Feb 21, 2025

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