Commit Graph

8 Commits

Author SHA1 Message Date
Chuck Jazdzewski e7d9cb3e4c feat(compiler): narrow types of expressions used in *ngIf (#20702)
Structural directives can now specify a type guard that describes
what types can be inferred for an input expression inside the
directive's template.

NgIf was modified to declare an input guard on ngIf.

After this change, `fullTemplateTypeCheck` will infer that
usage of `ngIf` expression inside it's template is truthy.

For example, if a component has a property `person?: Person`
and a template of `<div *ngIf="person"> {{person.name}} </div>`
the compiler will no longer report that `person` might be null or
undefined.

The template compiler will generate code similar to,

```
  if (NgIf.ngIfTypeGuard(instance.person)) {
    instance.person.name
  }
```

to validate the template's use of the interpolation expression.
Calling the type guard in this fashion allows TypeScript to infer
that `person` is non-null.

Fixes: #19756?

PR Close #20702
2017-12-08 10:24:26 -08:00
Alex Eagle f841fbe60f fix(compiler-cli): propagate ts.SourceFile moduleName into metadata 2017-12-01 14:19:06 -08:00
Chuck Jazdzewski 8ecda94899 feat(compiler-cli): improve error messages produced during structural errors (#20459)
The errors produced when error were encountered while interpreting the
content of a directive was often incomprehencible. With this change
these kind of error messages should be easier to understand and diagnose.

PR Close #20459
2017-11-27 16:59:57 -06:00
Alex Eagle 5ec1717c58 fix: Update test code to type-check under TS 2.5 (#20175)
PR Close #20175
2017-11-15 18:12:16 -06:00
Chuck Jazdzewski a75040d0a1 refactor(compiler): bump metadata version to 4 (#19338)
Also adds auto upgrade from lower version based
on the .d.ts file (e.g. from version 3 to 4).

This is needed as we are now also capturing type aliases
in metadata files (and we rely on this),
see 6e3498ca8e.
2017-09-26 13:31:59 -07:00
Tobias Bosch 62602b9bd8 fix(compiler): collect non exported symbols in d.ts files (#19301)
TS treats all symbols in d.ts files as exported,
whether they have an `export` keyword or not.

PR Close #19301
2017-09-21 09:59:40 -07:00
Olivier Combe b6b18c1d7f fix(tsc-wrapped): deduplicate metadata only when the module is the same (#19249)
Fixes #19219
PR Close #19249
2017-09-18 21:15:49 -07:00
Matias Niemelä 4695c69cf1 refactor(compiler): remove all source-level traces to tsc-wrapped (#18966)
- temporarily keeps the old sources under packages/tsc-wrapped
  until the build scripts are changed to use compiler-cli everywhere.
- removes the compiler options `disableTransformerPipeline` that was introduced
  in a previous beta of Angular 5, i.e. the transformer based compiler
  is now always enabled.

PR Close #18966
2017-09-13 20:47:37 -04:00