fix(compiler): handle strings inside bindings that contain binding characters by crisbeto · Pull Request #39826 · angular/angular

crisbeto · 2020-11-24T17:08:53Z

Currently the compiler treats something like {{ '{{a}}' }} as a nested binding and throws an error, because it doesn't account for quotes when it looks for binding characters. These changes add a bit of logic to skip over text inside quotes when parsing.

AndrewKushnir

The change looks good, I've just left a few comments.

I think it'd be great if @petebacondarwin can have a look as well, since he did some work in expression parser recently.

Thank you.

packages/compiler/src/expression_parser/parser.ts

packages/compiler/test/template_parser/template_parser_spec.ts

packages/compiler/src/expression_parser/parser.ts

petebacondarwin

Nice little fix @crisbeto - I agree with @AndrewKushnir's test addition suggestion. I made some suggestions of my own for the tests and the algorithm. Feel free to consider them :-)

packages/compiler/src/expression_parser/parser.ts

packages/compiler/test/template_parser/template_parser_spec.ts

crisbeto · 2020-11-25T18:59:55Z

Thank you for the reviews everybody, all of the should be addressed now.

packages/compiler/test/expression_parser/parser_spec.ts

AndrewKushnir · 2020-11-30T16:42:53Z

Presubmit.

AndrewKushnir · 2020-12-01T03:23:24Z

@crisbeto just a quick update:

it looks like there is a merge conflict now, could you please rebase when you get a chance?
presubmit indicated a problem with one of the targets (thus adding the "blocked" label for now). The problem seems to be related to a typo in a template, but I need a bit more time to investigate it and probably do a global run to make sure there is no regression in other places.

Will keep this thread updated.

AndrewKushnir · 2020-12-01T03:28:42Z

Global presubmit.

…ding characters

crisbeto · 2020-12-08T19:55:30Z

Thank you for looking into it @AndrewKushnir. I've added logic to handle the two use cases that you mentioned and included some more unit tests. Can we run it through again?

AndrewKushnir

I've added logic to handle the two use cases that you mentioned and included some more unit tests. Can we run it through again?

Thanks @crisbeto! I've just added a quick comment on the // case to see if we can add more tests (and whether the way we handle that is correct). Could you please have a look when you get a chance?

packages/compiler/test/expression_parser/parser_spec.ts

AndrewKushnir · 2020-12-09T02:20:34Z

Presubmit #2 + Global Presubmit #2.

AndrewKushnir · 2020-12-09T19:13:15Z

FYI, presubmits went well 👍

JoostK

LGTM!

…aracters (#39826) Currently the compiler treats something like `{{ '{{a}}' }}` as a nested binding and throws an error, because it doesn't account for quotes when it looks for binding characters. These changes add a bit of logic to skip over text inside quotes when parsing. Fixes #39601. PR Close #39826

lazarljubenovic · 2020-12-16T10:18:05Z

packages/compiler/test/expression_parser/parser_spec.ts

+    it('should parse interpolation with escaped backslashes', () => {
+      checkInterpolation(`{{foo.split('\\\\')}}`, `{{ foo.split("\\") }}`);
+      checkInterpolation(`{{foo.split('\\\\\\\\')}}`, `{{ foo.split("\\\\") }}`);
+      checkInterpolation(`{{foo.split('\\\\\\\\\\\\')}}`, `{{ foo.split("\\\\\\") }}`);


A tip: this code would greatly benefit from String.raw`\no \escaping \here`. See MDN for details.

…ng in property binding Currently we check whether a property binding contains an interpolation using a regex so that we can throw an error. The problem is that the regex doesn't account for quotes which means that something like `[prop]="'{{ foo }}'"` will be considered an error, even though it's not actually an interpolation. These changes build on top of the logic from angular#39826 to account for interpolation characters inside quotes. Fixes angular#39601.

…ng in property binding (#40267) Currently we check whether a property binding contains an interpolation using a regex so that we can throw an error. The problem is that the regex doesn't account for quotes which means that something like `[prop]="'{{ foo }}'"` will be considered an error, even though it's not actually an interpolation. These changes build on top of the logic from #39826 to account for interpolation characters inside quotes. Fixes #39601. PR Close #40267

angular-automatic-lock-bot · 2021-01-16T17:08:13Z

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google-cla bot added the cla: yes label Nov 24, 2020

crisbeto force-pushed the 39601/interpolation-quoted branch 2 times, most recently from 1e58121 to 13f72e3 Compare November 24, 2020 17:51

crisbeto marked this pull request as ready for review November 24, 2020 18:30

crisbeto added action: review The PR is still awaiting reviews from at least one requested reviewer area: compiler Issues related to `ngc`, Angular's template compiler compiler: parser target: patch This PR is targeted for the next patch release labels Nov 24, 2020

ngbot bot modified the milestone: needsTriage Nov 24, 2020

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AndrewKushnir requested a review from petebacondarwin November 25, 2020 01:25

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crisbeto force-pushed the 39601/interpolation-quoted branch from 13f72e3 to 1512e3b Compare November 25, 2020 17:05

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crisbeto force-pushed the 39601/interpolation-quoted branch from 96801fb to 674d300 Compare November 28, 2020 10:17

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crisbeto added 2 commits December 8, 2020 17:34

fixup! fix(compiler): handle strings inside bindings that contain bin…

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fixup! fix(compiler): handle strings inside bindings that contain bin…

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crisbeto force-pushed the 39601/interpolation-quoted branch from 83c70bd to 1a96c5e Compare December 8, 2020 19:25

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JoostK mentioned this pull request Dec 15, 2020

Using {{ and }} in strings in templates breaks the compiler #40133

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crisbeto mentioned this pull request Dec 26, 2020

fix(compiler): don't report parse error for interpolation inside string in property binding #40267

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