Nearly everything in a merge of JS special assignments looks like a
valueDeclaration. This commit ensures that intermediate "module
declarations" are not used when a better valueDeclaration is available:
```js
// File1.js
var X = {}
X.Y.Z = class { }
// File2.js
X.Y = {}
```
In the above example, the `Y` in `X.Y.Z = class { }` was used as the
valueDeclaration for `Y` because it appeared before `X.Y = {}` in the
compilation.
This change exposed a bug in binding, #24703, that required a change in
typeFromPropertyAssignmentOutOfOrder. The test still fails for the
original reason it was created, and the new bug #24703 contains a repro.
Do this by not widening properties of an object literal that are
1. JS initialisers
2. and not an object literal
These properties have types that will never widen, so the compiler
shouldn't ask for the types earlier than it strictly needs to.
* Simplify parseJSDocIdentifierName
It now always creates a missing node. The one place that depended on it
returning undefined, parseJSDocTypeNameWithNamespace, now returns
undefined before calling parseJSDocIdentifierName.
* Remove assert
It is adequately proven at compile time.
* Use more nodelike paths for import types when possible
* move functionality from services into compiler, fix with propert file/directory conflict handling
* mark suspect cast
* If parsing a function type fails, parseTypeReference() to ensure something is returned
* Avoid tryParse
* Add missing semicolon
* Don't check for undefined, check for missing type
* Don't set parameters undefined, set to missingList and return false
* Update API baselines
* Code review
Fix the issue with createSemanticDiagnosticsBuilderProgram, createEmitAndSemanticDiagnosticsBuilderProgram and createAbstractBuilder not assignable to CreateProgram<T>
* Parse (and mostly support) template tag constraints
A bunch of tests hit the asserts I added though.
* Messy version is finished. Need to add a few tests
* Refactor to be smaller
* Small refactor + Add one test
* Another test
* Minor cleanup
* Fix error reporting on type parameters on ctors
* Simplify syntax of `@template` tag
This is a breaking change, but in my sample, nobody except webpack used the
erroneous syntax. I need to improve the error message, so
jsdocTemplateTag3 currently fails to remind me of that.
* Better error message for template tag
* Fix fourslash baselines
* Another fourslash update
* Address PR comments
* Simplify getEffectiveTypeParameterDeclarations
Make checkGrammarConstructorTypeParameters do a little more work
