# inputs must be named Code vec_expand_grid(1) Condition Error in `vec_expand_grid()`: ! All inputs must be named. --- Code vec_expand_grid(x = 1, 2, y = 3) Condition Error in `vec_expand_grid()`: ! All inputs must be named. # catches duplicate names by default Code vec_expand_grid(a = 1, a = 2) Condition Error in `vec_expand_grid()`: ! Names must be unique. x These names are duplicated: * "a" at locations 1 and 2. i Use argument `.name_repair` to specify repair strategy. # errors on non vectors and mentions the element name Code vec_expand_grid(y = environment()) Condition Error in `vec_expand_grid()`: ! `y` must be a vector, not an environment. # can adjust the `.error_call` Code my_expand_grid() Condition Error in `my_expand_grid()`: ! `x` must be a vector, not an environment. # errors nicely when expansion results in a size larger than `R_len_t` Code vec_expand_grid(x = x, y = y) Condition Error in `vec_expand_grid()`: ! Long vectors are not yet supported. Expansion results in an allocation larger than 2^31-1 elements. Attempted allocation size was 3221225469. # errors nicely when expansion results in a size larger than `R_xlen_t` Code vec_expand_grid(x = x, y = x) Condition Error in `vec_expand_grid()`: ! Result too large for an `r_ssize`. i In file './rlang/c-utils.h' at line <scrubbed>. i This is an internal error that was detected in the vctrs package. Please report it at <https://github.com/r-lib/vctrs/issues> with a reprex (<https://https://tidyverse.org/help/>) and the full backtrace. # validates `.vary` Code vec_expand_grid(.vary = 1) Condition Error in `vec_expand_grid()`: ! `.vary` must be a string or character vector. --- Code vec_expand_grid(.vary = "x") Condition Error in `vec_expand_grid()`: ! `.vary` must be one of "slowest" or "fastest", not "x".
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