typetracer
Trace Function Parameter Types
v0.2.3
·
Dec 3, 2025
·
MIT + file LICENSE
Description
The 'R' language includes a set of defined types, but the language itself is "absurdly dynamic" (Turcotte & Vitek (2019) <doi:10.1145/3340670.3342426>), and lacks any way to specify which types are expected by any expression. The 'typetracer' package enables code to be traced to extract detailed information on the properties of parameters passed to 'R' functions. 'typetracer' can trace individual functions or entire packages.
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CRAN Check Status
2
ERROR
11
OK
Show all 13 flavors
| Flavor | Status |
|---|---|
| r-devel-linux-x86_64-debian-clang | OK |
| r-devel-linux-x86_64-debian-gcc | OK |
| r-devel-linux-x86_64-fedora-clang | OK |
| r-devel-linux-x86_64-fedora-gcc | OK |
| r-devel-windows-x86_64 | OK |
| r-oldrel-macos-arm64 | OK |
| r-oldrel-macos-x86_64 | OK |
| r-oldrel-windows-x86_64 | OK |
| r-patched-linux-x86_64 | ERROR |
| r-release-linux-x86_64 | ERROR |
| r-release-macos-arm64 | OK |
| r-release-macos-x86_64 | OK |
| r-release-windows-x86_64 | OK |
Check details (2 non-OK)
ERROR
r-patched-linux-x86_64
tests
Running ‘testthat.R’ [5s/8s]
Running the tests in ‘tests/testthat.R’ failed.
Complete output:
> library (testthat)
> library (typetracer)
>
> test_check ("typetracer")
* installing *binary* package ‘rematch’ ...
* DONE (rematch)
* installing *binary* package ‘rematch’ ...
* DONE (rematch)
* installing *source* package ‘rematch’ ...
** this is package ‘rematch’ version ‘1.0.1’
** using non-staged installation
** R
** inst
** tests
** byte-compile and prepare package for lazy loading
** help
*** installing help indices
converting help for package ‘rematch’
finding HTML links ... done
re_match html example
re_match_all html
rematch html
** building package indices
** testing if installed package can be loaded
* DONE (rematch)
[ FAIL 1 | WARN 0 | SKIP 2 | PASS 39 ]
══ Skipped tests (2) ═══════════════════════════════════════════════════════════
• On CRAN (2): 'test-trace-fns.R:4:1', 'test-utils.R:47:1'
══ Failed tests ════════════════════════════════════════════════════════════════
── Error ('test-trace-package.R:82:5'): trace source package ───────────────────
Error: Test failures.
[ FAIL 1 | WARN 0 | SKIP 2 | PASS 39 ]
Error:
! Test failures.
Execution halted
ERROR
r-release-linux-x86_64
tests
Running ‘testthat.R’ [5s/7s]
Running the tests in ‘tests/testthat.R’ failed.
Complete output:
> library (testthat)
> library (typetracer)
>
> test_check ("typetracer")
* installing *binary* package ‘rematch’ ...
* DONE (rematch)
* installing *binary* package ‘rematch’ ...
* DONE (rematch)
* installing *source* package ‘rematch’ ...
** this is package ‘rematch’ version ‘1.0.1’
** using non-staged installation
** R
** inst
** tests
** byte-compile and prepare package for lazy loading
** help
*** installing help indices
converting help for package ‘rematch’
re_match example
** building package indices
** testing if installed package can be loaded
* DONE (rematch)
[ FAIL 1 | WARN 0 | SKIP 2 | PASS 39 ]
══ Skipped tests (2) ═══════════════════════════════════════════════════════════
• On CRAN (2): 'test-trace-fns.R:4:1', 'test-utils.R:47:1'
══ Failed tests ════════════════════════════════════════════════════════════════
── Error ('test-trace-package.R:82:5'): trace source package ───────────────────
Error: Test failures.
[ FAIL 1 | WARN 0 | SKIP 2 | PASS 39 ]
Error:
! Test failures.
Execution halted
Check History
ERROR 12 OK · 0 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE Jun 7, 2026
ERROR
r-release-linux-x86_64
tests
Running ‘testthat.R’ [5s/7s]
Running the tests in ‘tests/testthat.R’ failed.
Complete output:
> library (testthat)
> library (typetracer)
>
> test_check ("typetracer")
* installing *binary* package ‘rematch’ ...
* DONE (rematch)
* inst
...[truncated]...
════════════════════════════════════════════════════
── Error ('test-trace-package.R:82:5'): trace source package ───────────────────
Error: Test failures.
[ FAIL 1 | WARN 0 | SKIP 2 | PASS 39 ]
Error:
! Test failures.
Execution halted
OK 13 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE Jun 3, 2026
ERROR 12 OK · 0 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE Jun 2, 2026
ERROR
r-devel-linux-x86_64-fedora-gcc
re-building of vignette outputs
Error(s) in re-building vignettes: --- re-building ‘nse.Rmd’ using rmarkdown Quitting from nse.Rmd:33-44 [nse1] ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ <error/rlang_error> Error in `match.call()`: ! unused ar ...[truncated]... ~~~~~~~~~~~~~~~~~~ Error: processing vignette 'nse.Rmd' failed with diagnostics: unused argument (2:3) --- failed re-building ‘nse.Rmd’ SUMMARY: processing the following file failed: ‘nse.Rmd’ Error: Vignette re-building failed. Execution halted
OK 12 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE Apr 25, 2026
ERROR 13 OK · 0 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE Mar 10, 2026
ERROR
r-oldrel-macos-arm64
tests
Running ‘testthat.R’ [3s/3s]
Running the tests in ‘tests/testthat.R’ failed.
Complete output:
> library (testthat)
> library (typetracer)
>
> test_check ("typetracer")
* installing *binary* package ‘rematch’ ...
* DONE (rematch)
Saving
...[truncated]...
e installed package ──────────────
Expected `all(grepl("\\.Rd$", x0$source_file_name))` to be TRUE.
Differences:
`actual`: FALSE
`expected`: TRUE
[ FAIL 2 | WARN 0 | SKIP 2 | PASS 45 ]
Error:
! Test failures.
Execution halted