{"id":16938659,"url":"https://github.com/dsnet/try","last_synced_at":"2025-10-24T14:45:47.535Z","repository":{"id":40462276,"uuid":"487970758","full_name":"dsnet/try","owner":"dsnet","description":"Simplified error handling in Go","archived":false,"fork":false,"pushed_at":"2022-12-02T21:11:45.000Z","size":14,"stargazers_count":168,"open_issues_count":0,"forks_count":5,"subscribers_count":9,"default_branch":"master","last_synced_at":"2025-03-31T08:12:23.828Z","etag":null,"topics":[],"latest_commit_sha":null,"homepage":null,"language":"Go","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"bsd-3-clause","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/dsnet.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":"LICENSE.md","code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null}},"created_at":"2022-05-02T19:46:16.000Z","updated_at":"2025-03-17T00:55:10.000Z","dependencies_parsed_at":"2023-01-22T23:00:10.091Z","dependency_job_id":null,"html_url":"https://github.com/dsnet/try","commit_stats":null,"previous_names":[],"tags_count":3,"template":false,"template_full_name":null,"repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/dsnet%2Ftry","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/dsnet%2Ftry/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/dsnet%2Ftry/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/dsnet%2Ftry/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/dsnet","download_url":"https://codeload.github.com/dsnet/try/tar.gz/refs/heads/master","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":247632705,"owners_count":20970204,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":[],"created_at":"2024-10-13T21:01:34.961Z","updated_at":"2025-10-24T14:45:47.455Z","avatar_url":"https://github.com/dsnet.png","language":"Go","funding_links":[],"categories":[],"sub_categories":[],"readme":"# Try: Simplified Error Handling in Go\n\n[![GoDev](https://img.shields.io/static/v1?label=godev\u0026message=reference\u0026color=00add8)][godev]\n[![Build Status](https://github.com/dsnet/try/actions/workflows/test.yml/badge.svg?branch=master)][actions]\n\nThis module reduces the syntactic cost of error handling in Go.\n\nExample usage in a main program:\n\n```go\nfunc main() {\n    defer try.F(log.Fatal)\n    b := try.E1(os.ReadFile(...))\n    var v any\n    try.E(json.Unmarshal(b, \u0026v))\n    ...\n}\n```\n\nExample usage in a unit test:\n\n```go\nfunc Test(t *testing.T) {\n    defer try.F(t.Fatal)\n    db := try.E1(setdb.Open(...))\n    defer db.Close()\n    ...\n    try.E(db.Commit())\n}\n```\n\nCode before `try`:\n\n```go\nfunc (a *MixedArray) UnmarshalNext(uo json.UnmarshalOptions, d *json.Decoder) error {\n    switch t, err := d.ReadToken(); {\n    case err != nil:\n        return err\n    case t.Kind() != '[':\n        return fmt.Errorf(\"got %v, expecting array start\", t.Kind())\n    }\n\n    if err := uo.UnmarshalNext(d, \u0026a.Scalar); err != nil {\n        return err\n    }\n    if err := uo.UnmarshalNext(d, \u0026a.Slice); err != nil {\n        return err\n    }\n    if err := uo.UnmarshalNext(d, \u0026a.Map); err != nil {\n        return err\n    }\n\n    switch t, err := d.ReadToken(); {\n    case err != nil:\n        return err\n    case t.Kind() != ']':\n        return fmt.Errorf(\"got %v, expecting array end\", t.Kind())\n    }\n    return nil\n}\n```\n\nCode after `try`:\n\n```go\nfunc (a *MixedArray) UnmarshalNext(uo json.UnmarshalOptions, d *json.Decoder) (err error) {\n    defer try.Handle(\u0026err)\n    if t := try.E1(d.ReadToken()); t.Kind() != '[' {\n        return fmt.Errorf(\"found %v, expecting array start\", t.Kind())\n    }\n    try.E(uo.UnmarshalNext(d, \u0026a.Scalar))\n    try.E(uo.UnmarshalNext(d, \u0026a.Slice))\n    try.E(uo.UnmarshalNext(d, \u0026a.Map))\n    if t := try.E1(d.ReadToken()); t.Kind() != ']' {\n        return fmt.Errorf(\"found %v, expecting array end\", t.Kind())\n    }\n    return nil\n}\n```\n\nSee the [documentation][godev] for more information.\n\n[godev]: https://pkg.go.dev/github.com/dsnet/try\n[actions]: https://github.com/dsnet/try/actions\n\n## Install\n\n```\ngo get -u github.com/dsnet/try\n```\n\n## Semgrep rules\n\nThese [semgrep](https://semgrep.dev) rules can help prevent bugs and abuse:\n\n```yaml\nrules:\n  - id: non-deferred-try-handle\n    patterns:\n      - pattern-either:\n          - pattern: try.F(...)\n          - pattern: try.Handle(...)\n          - pattern: try.HandleF(...)\n          - pattern: try.Recover(...)\n      - pattern-not: defer try.F(...)\n      - pattern-not: defer try.Handle(...)\n      - pattern-not: defer try.HandleF(...)\n      - pattern-not: defer try.Recover(...)\n    message: Calls to try handlers must be deferred\n    severity: ERROR\n    languages:\n      - go\n  - id: missing-try-handler\n    patterns:\n      - pattern-either:\n          - pattern: try.E(...)\n          - pattern: try.E1(...)\n          - pattern: try.E2(...)\n          - pattern: try.E3(...)\n          - pattern: try.E4(...)\n      - pattern-not-inside: |\n          ...\n          defer try.F(...)\n          ...\n      - pattern-not-inside: |\n          ...\n          defer try.Handle(...)\n          ...\n      - pattern-not-inside: |\n          ...\n          defer try.HandleF(...)\n          ...\n      - pattern-not-inside: |\n          ...\n          defer try.Recover(...)\n          ...\n    message: Calls to try.E[n] must have a matching function-local handler\n    severity: ERROR\n    languages:\n      - go\n```\n\n## License\n\nBSD - See [LICENSE][license] file\n\n[license]: https://github.com/dsnet/try/blob/master/LICENSE.md\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fdsnet%2Ftry","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fdsnet%2Ftry","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fdsnet%2Ftry/lists"}