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What happens when a tibble is printed? This vignette shows the actual
control flow, powered by the debugme package. See
vignette("printing") for a detailed description of the
control and data flows.
To activate debugging, we need to set an environment variable before loading the pillar package. As a result, debug strings in pillar’s code are replaced with calls to a logging function.
By default, debugme also shows timestamps. This is disabled to keep the output stable.
Sys.setenv(DEBUGME = "!!!!pillar")
Sys.setenv(DEBUGME_SHOW_TIMESTAMP = "no")
library(pillar)
tbl <- tibble::tibble(a = 1:3, b = tibble::tibble(c = 4:6, d = 7:9), e = 10:12)
print(tbl, width = 23)#> #> pillar tbl_format_setup()
#> #> pillar +-tbl_format_setup.tbl()
#> #> pillar +-ctl_colonnade()
#> #> pillar +-ctl_new_compound_pillar(width = 21, title = "a")
#> #> pillar +-ctl_new_compound_pillar.tbl(width = 21, title = "a")
#> #> pillar +-ctl_new_pillar(width = 21, title = "a")
#> #> pillar +-ctl_new_pillar.tbl(width = 21, title = "a")
#> #> pillar +-pillar(title = "a", width = 21)
#> #> pillar +-new_pillar_title(x = "a")
#> #> pillar +-new_pillar_type(class(x) = "integer")
#> #> pillar +-pillar_shaft(class(x) = "integer")
#> #> pillar +-new_pillar_component(x = <list: <pllr_sh_>>, width = 1L, min_width = 1L)
#> #> pillar +-new_pillar(width = 21, class = NULL)
#> #> pillar +-new_pillar_component(x = <list: <pllr_ttl>>, width = 1L, min_width = 1L)
#> #> pillar +-new_pillar_component(x = <list: <pllr_typ>>, width = 5L, min_width = 5L)
#> #> pillar +-ctl_new_compound_pillar(width = 15, title = "b")
#> #> pillar +-ctl_new_compound_pillar.tbl(width = 15, title = "b")
#> #> pillar +-ctl_new_compound_pillar(width = 15, title = <chr: "b$", "c">)
#> #> pillar +-ctl_new_compound_pillar.tbl(width = 15, title = <chr: "b$", "c">)
#> #> pillar +-ctl_new_pillar(width = 15, title = "b$c")
#> #> pillar +-ctl_new_pillar.tbl(width = 15, title = "b$c")
#> #> pillar +-pillar(title = "b$c", width = 15)
#> #> pillar +-new_pillar_title(x = "b$c")
#> #> pillar +-new_pillar_type(class(x) = "integer")
#> #> pillar +-pillar_shaft(class(x) = "integer")
#> #> pillar +-new_pillar_component(x = <list: <pllr_sh_>>, width = 1L, min_width = 1L)
#> #> pillar +-new_pillar(width = 15, class = NULL)
#> #> pillar +-new_pillar_component(x = <list: <pllr_ttl>>, width = 3L, min_width = 3L)
#> #> pillar +-new_pillar_component(x = <list: <pllr_typ>>, width = 5L, min_width = 5L)
#> #> pillar +-ctl_new_compound_pillar(width = 9, title = <chr: "$", "d">)
#> #> pillar +-ctl_new_compound_pillar.tbl(width = 9, title = <chr: "$", "d">)
#> #> pillar +-ctl_new_pillar(width = 9, title = "$d")
#> #> pillar +-ctl_new_pillar.tbl(width = 9, title = "$d")
#> #> pillar +-pillar(title = "$d", width = 9)
#> #> pillar +-new_pillar_title(x = "$d")
#> #> pillar +-new_pillar_type(class(x) = "integer")
#> #> pillar +-pillar_shaft(class(x) = "integer")
#> #> pillar +-new_pillar_component(x = <list: <pllr_sh_>>, width = 1L, min_width = 1L)
#> #> pillar +-new_pillar(width = 9, class = NULL)
#> #> pillar +-new_pillar_component(x = <list: <pllr_ttl>>, width = 2L, min_width = 2L)
#> #> pillar +-new_pillar_component(x = <list: <pllr_typ>>, width = 5L, min_width = 5L)
#> #> pillar +-new_pillar_component(x = <list: <pllr_ttl>, <pllr_ttl>>, width = <int: 3L, 2L>, min_width = <int: 3L, 2L>)
#> #> pillar +-new_pillar_component(x = <list: <pllr_typ>, <pllr_typ>>, width = <int: 5L, 5L>, min_width = <int: 5L, 5L>)
#> #> pillar +-new_pillar_component(x = <list: <pllr_sh_>, <pllr_sh_>>, width = <int: 1L, 1L>, min_width = <int: 1L, 1L>)
#> #> pillar +-new_pillar(width = NULL, class = "compound_pillar")
#> #> pillar +-ctl_new_compound_pillar(width = 3, title = "e")
#> #> pillar +-ctl_new_compound_pillar.tbl(width = 3, title = "e")
#> #> pillar +-ctl_new_pillar(width = 3, title = "e")
#> #> pillar +-ctl_new_pillar.tbl(width = 3, title = "e")
#> #> pillar +-pillar(title = "e", width = 3)
#> #> pillar +-new_pillar_title(x = "e")
#> #> pillar +-new_pillar_type(class(x) = "integer")
#> #> pillar +-new_pillar_component(x = <list: <pllr_ttl>, <pllr_ttl>, <pllr_ttl>>, width = <int: 1L, 3L, 2L>, min_width = <int: 1L, 3L, 2L>)
#> #> pillar +-new_pillar_component(x = <list: <pllr_typ>, <pllr_typ>, <pllr_typ>>, width = <int: 5L, 5L, 5L>, min_width = <int: 5L, 5L, 5L>)
#> #> pillar +-new_pillar_component(x = <list: <pllr_sh_>, <pllr_sh_>, <pllr_sh_>>, width = <int: 1L, 1L, 1L>, min_width = <int: 1L, 1L, 1L>)
#> #> pillar +-new_pillar(width = NULL, class = "compound_pillar")
#> #> pillar +-new_pillar(width = NULL, class = NULL)
#> #> pillar +-new_pillar_component(x = <list: <pllr_ttl>>, width = 1L, min_width = 1L)
#> #> pillar +-new_pillar_component(x = <list: <pllr_typ>>, width = 5L, min_width = 5L)
#> #> pillar +-new_pillar_component(x = <list: <pllr_sh_>>, width = 1L, min_width = 1L)
#> #> pillar +-new_pillar(width = NULL, class = NULL)
#> #> pillar +-new_pillar_component(x = <list: <pllr_ttl>>, width = 3L, min_width = 3L)
#> #> pillar +-new_pillar_component(x = <list: <pllr_typ>>, width = 5L, min_width = 5L)
#> #> pillar +-new_pillar_component(x = <list: <pllr_sh_>>, width = 1L, min_width = 1L)
#> #> pillar +-new_pillar(width = NULL, class = NULL)
#> #> pillar +-new_pillar_component(x = <list: <pllr_ttl>>, width = 2L, min_width = 2L)
#> #> pillar +-new_pillar_component(x = <list: <pllr_typ>>, width = 5L, min_width = 5L)
#> #> pillar +-new_pillar_component(x = <list: <pllr_sh_>>, width = 1L, min_width = 1L)
#> #> pillar +-new_pillar_component(x = <list: <pllr_rf_>>, width = 1L, min_width = 1L)
#> #> pillar +-new_pillar_component(x = <list: <pllr_rf_>>, width = 1L, min_width = 1L)
#> #> pillar +-new_pillar(width = NULL, class = NULL)
#> #> # A tibble: 3 x 3
#> #> a b$c $d
#> #> <int> <int> <int>
#> #> 1 1 4 7
#> #> 2 2 5 8
#> #> 3 3 6 9
#> #> # … with 1 more
#> #> # variable: e <int>These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.
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