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catch variables should not be flagged as unused with --noUnusedParamters #9402

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mhegazy opened this issue Jun 28, 2016 · 2 comments
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Bug A bug in TypeScript Fixed A PR has been merged for this issue

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@mhegazy
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mhegazy commented Jun 28, 2016

        try {
           throw new Error();
        }
        catch (e) {
            return false;
        }

e should not be an error.

@mhegazy mhegazy added the Bug A bug in TypeScript label Jun 28, 2016
@mhegazy mhegazy added this to the TypeScript 2.0 milestone Jun 28, 2016
@mhegazy mhegazy assigned mhegazy and unassigned sarangan12 Jun 29, 2016
@mhegazy mhegazy added the Fixed A PR has been merged for this issue label Jun 30, 2016
@mhegazy mhegazy closed this as completed Jun 30, 2016
yuit added a commit that referenced this issue Jul 18, 2016
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* Add watch task

* Working non-inline sourcemaps for runtests

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* Lazypipes and better services stream management

* export interface used by other exported functions

* Make goto-definition work for `this` parameter

* Add new error for rest parameters

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Fixes #9293

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* Do copyright without gulp-if and lazypipe

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* Remove tsd scripts task from gulpfile

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* Remove Signature#thisType and use Signature#thisParameter everywhere

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* Change reference tests to verify actual ranges referenced and not just their count

* Respond to PR comments

* Add new lint rule

* Fix object whitespace lints

* Fix case of gulpfile dependencies

* 1. pass subshell args 2. fix build order in services

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2. services/ depends on a couple of files from server/ but the order was
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* Fix LKG useDebug task and newLine flag

* Update LKG

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* Fix typo

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* wip-address PR

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* Fix linting error

* Unused identifiers compiler code (#9200)

* Code changes to update references of the Identifiers

* Added code for handling function, method and coonstructor level local variables and parameters

* Rebased with origin master

* Code changes to handle unused private variables, private methods and typed parameters

* Code changes to handle namespace level elements

* Code changes to handle unimplemented interfaces

* Code to optimize the d.ts check

* Correct Code change to handle the parameters for methods inside interfaces

* Fix for lint error

* Remove Trailing whitespace

* Code changes to handle interface implementations

* Changes to display the error position correctly

* Compiler Test Cases

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* Removing unnecessary tests

* Additional changes for compiler code

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* Fixing the consolidated case

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* do not format comma/closeparen in jsxelement

* format jsx expression

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* Remove upper boilerplate from issue template

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* Update issue_template.md

* new options should be optional for compatibility

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* VarDate interface and relevant Date.prototype members

* Fix 9363: Object destructuring broken-variables are bound to the wrong object (#9383)

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* Port new JSDOC tests to use baseline

* substitute alias for class expression in statics

* Address new lint warnings

* Change name for substitution function.
@glen-84
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glen-84 commented Apr 8, 2018

@mhegazy Should this change now that catch clause variables are optional? (and I assume you could also use _e)

Error:

catch (e) { /* `e` not used */ }

Okay:

catch (_e) { /* `e` not used */ }

Okay:

catch { /* `e` not used */ }

@mhegazy
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mhegazy commented Apr 9, 2018

we can tighten it up now that we have the optional catch clause. we also need to update the quick fix to handle it correctly. a PR would be appreciated.

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