eval-tidy.md
In rlang: Functions for Base Types and Core R and 'Tidyverse' Features

fake pronoun fails informatively

Code
  # Fake pronouns
  f <- (function() .data$foo)
  (expect_error(f(), "subset"))
Output
  <error/rlang_error>
  Error in `f()`:
  ! Can't subset `.data` outside of a data mask context.
Code
  f <- (function() .data[["foo"]])
  (expect_error(f(), "subset"))
Output
  <error/rlang_error>
  Error in `f()`:
  ! Can't subset `.data` outside of a data mask context.

`.data` pronoun fails informatively

Code
  (expect_error(f()))
Output
  <error/rlang_error>
  Error in `g()`:
  ! Can't subset `.data` outside of a data mask context.
Code
  (expect_error(f(mtcars)))
Output
  <error/rlang_error_data_pronoun_not_found>
  Error in `.data$foo`:
  ! Column `foo` not found in `.data`.
Code
  g <- (function(data) h(.data[[2]], data))
  (expect_error(f(mtcars)))
Output
  <error/rlang_error>
  Error in `.data[[2]]`:
  ! Must subset the data pronoun with a string, not the number 2.
Code
  g <- (function(data) h(.data["foo"], data = data))
  (expect_error(f(mtcars)))
Output
  <error/rlang_error>
  Error in `.data["foo"]`:
  ! `[` is not supported by the `.data` pronoun, use `[[` or $ instead.
Code
  g <- (function(data) h(.data[["foo"]] <- 1, data = data))
  (expect_error(f(mtcars)))
Output
  <error/rlang_error>
  Error in `.data[["foo"]] <- ...`:
  ! Can't modify the data pronoun.
Code
  g <- (function(data) h(.data$foo <- 1, data = data))
  (expect_error(f(mtcars)))
Output
  <error/rlang_error>
  Error in `.data$"foo" <- ...`:
  ! Can't modify the data pronoun.
Code
  g <- (function(data) h(.env["foo"], data = data))
  (expect_error(f(mtcars)))
Output
  <error/rlang_error>
  Error in `.env["foo"]`:
  ! `[` is not supported by the `.env` pronoun, use `[[` or $ instead.
Code
  g <- (function(data) h(.env$foo <- 1, data = data))
  (expect_error(f(mtcars)))
Output
  <error/rlang_error>
  Error in `.env$"foo" <- ...`:
  ! Can't modify the context pronoun.
Code
  g <- (function(data) h(.env[["foo"]] <- 1, data = data))
  (expect_error(f(mtcars)))
Output
  <error/rlang_error>
  Error in `.env[["foo"]] <- ...`:
  ! Can't modify the context pronoun.