Expose internals used with other style guides

API

@@ -6,8 +6,22 @@ cache_activate(cache_name = NULL, verbose = !getOption("styler.quiet", FALSE))
 cache_clear(cache_name = NULL, ask = TRUE)
 cache_deactivate(verbose = !getOption("styler.quiet", FALSE))
 cache_info(cache_name = NULL, format = "both")
+compute_parse_data_nested(text, transformers = tidyverse_style(), more_specs = NULL)
 create_style_guide(initialize = default_style_guide_attributes, line_break = NULL, space = NULL, token = NULL, indention = NULL, use_raw_indention = FALSE, reindention = tidyverse_reindention(), style_guide_name = NULL, style_guide_version = NULL, more_specs_style_guide = NULL, transformers_drop = specify_transformers_drop(), indent_character = " ")
 default_style_guide_attributes(pd_flat)
+is_asymmetric_tilde_expr(pd)
+is_comment(pd)
+is_conditional_expr(pd)
+is_curly_expr(pd)
+is_for_expr(pd)
+is_function_call(pd)
+is_function_declaration(pd)
+is_symmetric_tilde_expr(pd)
+is_tilde_expr(pd, tilde_pos = c(1L, 2L))
+is_while_expr(pd)
+next_non_comment(pd, pos)
+previous_non_comment(pd, pos)
+scope_normalize(scope, name = substitute(scope))
 specify_math_token_spacing(zero = "'^'", one = c("'+'", "'-'", "'*'", "'/'"))
 specify_reindention(regex_pattern = NULL, indention = 0L, comments_only = TRUE)
 specify_transformers_drop(spaces = NULL, indention = NULL, line_breaks = NULL, tokens = NULL)
@@ -17,7 +31,7 @@ style_pkg(pkg = ".", ..., style = tidyverse_style, transformers = style(...), fi
 style_text(text, ..., style = tidyverse_style, transformers = style(...), include_roxygen_examples = TRUE, base_indention = 0L)
 tidyverse_math_token_spacing()
 tidyverse_reindention()
-tidyverse_style(scope = "tokens", strict = TRUE, indent_by = 2, start_comments_with_one_space = FALSE, reindention = tidyverse_reindention(), math_token_spacing = tidyverse_math_token_spacing())
+tidyverse_style(scope = "tokens", strict = TRUE, indent_by = 2L, start_comments_with_one_space = FALSE, reindention = tidyverse_reindention(), math_token_spacing = tidyverse_math_token_spacing())
 
 ## Foreign S3 methods
 

NAMESPACE

@@ -5,8 +5,22 @@ export(cache_activate)
 export(cache_clear)
 export(cache_deactivate)
 export(cache_info)
+export(compute_parse_data_nested)
 export(create_style_guide)
 export(default_style_guide_attributes)
+export(is_asymmetric_tilde_expr)
+export(is_comment)
+export(is_conditional_expr)
+export(is_curly_expr)
+export(is_for_expr)
+export(is_function_call)
+export(is_function_declaration)
+export(is_symmetric_tilde_expr)
+export(is_tilde_expr)
+export(is_while_expr)
+export(next_non_comment)
+export(previous_non_comment)
+export(scope_normalize)
 export(specify_math_token_spacing)
 export(specify_reindention)
 export(specify_transformers_drop)

R/detect-alignment.R

@@ -31,7 +31,7 @@
 #'   list(styler.cache_name = NULL), # temporarily deactivate cache
 #'   {
 #'     transformers <- tidyverse_style()
-#'     pd_nested <- styler:::compute_parse_data_nested(c(
+#'     pd_nested <- compute_parse_data_nested(c(
 #'       "call(",
 #'       "  ab = 1L,",
 #'       "  a  = 2",

R/expr-is.R

@@ -1,38 +1,72 @@
-#' Check whether a parse table corresponds to a certain expression
+#' What is a parse table representing?
 #'
-#' @param pd A parse table.
+#' Check whether a parse table corresponds to a certain expression.
 #' @name pd_is
+#'
+#' @param pd A parse table.
+#' @param tilde_pos Integer vector indicating row-indices that should be
+#'   checked for tilde. See 'Details'.
+#'
+#' @family third-party style guide helpers
 #' @keywords internal
 NULL
 
-#' @describeIn pd_is Checks whether `pd` contains an expression wrapped in
-#'   curly brackets.
-#' @keywords internal
+#' @describeIn pd_is Checks whether `pd` contains an expression wrapped in curly brackets.
+#' @examples
+#' code <- "if (TRUE) { 1 }"
+#' pd <- compute_parse_data_nested(code)
+#' is_curly_expr(pd)
+#' child_of_child <- pd$child[[1]]$child[[5]]
+#' is_curly_expr(child_of_child)
+#'
+#' @export
 is_curly_expr <- function(pd) {
   if (is.null(pd)) {
     return(FALSE)
   }
   pd$token[1L] == "'{'"
 }
 
+#' @describeIn pd_is Checks whether `pd` contains a `for` loop.
+#' @examples
+#' code <- "for (i in 1:5) print(1:i)"
+#' pd <- compute_parse_data_nested(code)
+#' is_for_expr(pd)
+#' is_for_expr(pd$child[[1]])
+#'
+#' @export
 is_for_expr <- function(pd) {
   pd$token[1L] == "FOR"
 }
 
 #' @describeIn pd_is Checks whether `pd` contains is a conditional expression.
-#' @keywords internal
-is_cond_expr <- function(pd) {
+#' @examples
+#' code <- "if (TRUE) x <- 1 else x <- 0"
+#' pd <- compute_parse_data_nested(code)
+#' is_conditional_expr(pd)
+#' is_conditional_expr(pd$child[[1]])
+#'
+#' @export
+is_conditional_expr <- function(pd) {
   pd$token[1L] == "IF"
 }
 
-#' @describeIn pd_is Checks whether `pd` contains is a while loop.
-#' @keywords internal
+#' @describeIn pd_is Checks whether `pd` contains a `while` loop.
+#' @export
 is_while_expr <- function(pd) {
   pd$token[1L] == "WHILE"
 }
 
+
 #' @describeIn pd_is Checks whether `pd` is a function call.
-#' @keywords internal
+#' @examples
+#' code <- "x <- list(1:3)"
+#' pd <- compute_parse_data_nested(code)
+#' is_function_call(pd)
+#' child_of_child <- pd$child[[1]]$child[[3]]
+#' is_function_call(child_of_child)
+#'
+#' @export
 is_function_call <- function(pd) {
   if (is.null(pd)) {
     return(FALSE)
@@ -44,56 +78,69 @@ is_function_call <- function(pd) {
 }
 
 #' @describeIn pd_is Checks whether `pd` is a function declaration.
-#' @keywords internal
-is_function_dec <- function(pd) {
+#' @examples
+#' code <- "foo <- function() NULL"
+#' pd <- compute_parse_data_nested(code)
+#' is_function_declaration(pd)
+#' child_of_child <- pd$child[[1]]$child[[3]]
+#' is_function_declaration(child_of_child)
+#'
+#' @export
+is_function_declaration <- function(pd) {
   if (is.null(pd)) {
     return(FALSE)
   }
   pd$token[1L] == "FUNCTION"
 }
 
 #' @describeIn pd_is Checks for every token whether or not it is a comment.
-#' @keywords internal
+#' @examples
+#' code <- "x <- 1 # TODO: check value"
+#' pd <- compute_parse_data_nested(code)
+#' is_comment(pd)
+#'
+#' @export
 is_comment <- function(pd) {
   if (is.null(pd)) {
     return(FALSE)
   }
   pd$token == "COMMENT"
 }
 
-
-
-#' Check whether a parse table contains a tilde
-#'
-#'
-#' @param pd A parse table.
-#' @param tilde_pos Integer vector indicating row-indices that should be
-#'   checked for tilde. See 'Details'.
-#'
+#' @describeIn pd_is Checks whether `pd` contains a tilde.
 #' @details
 #' A tilde is on the top row in the parse table if it is an asymmetric tilde
 #' expression (like `~column`), in the second row if it is a symmetric tilde
 #' expression (like `a~b`).
-#' @keywords internal
+#' @examples
+#' code <- "lm(wt ~ mpg, mtcars)"
+#' pd <- compute_parse_data_nested(code)
+#' is_tilde_expr(pd$child[[1]]$child[[3]])
+#' is_symmetric_tilde_expr(pd$child[[1]]$child[[3]])
+#' is_asymmetric_tilde_expr(pd$child[[1]]$child[[3]])
+#'
+#' @export
 is_tilde_expr <- function(pd, tilde_pos = c(1L, 2L)) {
   if (is.null(pd) || nrow(pd) == 1L) {
     return(FALSE)
   }
   any(pd$token[tilde_pos] == "'~'")
 }
 
-#' @rdname is_tilde_expr
+#' @describeIn pd_is If `pd` contains a tilde, checks whether it is asymmetrical.
+#' @export
 is_asymmetric_tilde_expr <- function(pd) {
   is_tilde_expr(pd, tilde_pos = 1L)
 }
 
-#' @rdname is_tilde_expr
+#' @describeIn pd_is If `pd` contains a tilde, checks whether it is symmetrical.
+#' @export
 is_symmetric_tilde_expr <- function(pd) {
   is_tilde_expr(pd, tilde_pos = 2L)
 }
 
 is_subset_expr <- function(pd) {
-  if (is.null(pd) || nrow(pd) == 1) {
+  if (is.null(pd) || nrow(pd) == 1L) {
     return(FALSE)
   }
   pd$token[2L] %in% subset_token_opening
@@ -152,7 +199,7 @@ contains_else_expr_that_needs_braces <- function(pd) {
     non_comment_after_else <- next_non_comment(pd, else_idx)
     sub_expr <- pd$child[[non_comment_after_else]]
     # needs braces if NOT if_condition, NOT curly expr
-    !is_cond_expr(sub_expr) && !is_curly_expr(sub_expr)
+    !is_conditional_expr(sub_expr) && !is_curly_expr(sub_expr)
   } else {
     FALSE
   }

R/initialize.R

@@ -9,7 +9,7 @@
 #'   list(styler.cache_name = NULL), # temporarily deactivate cache
 #'   {
 #'     string_to_format <- "call( 3)"
-#'     pd <- styler:::compute_parse_data_nested(string_to_format)
+#'     pd <- compute_parse_data_nested(string_to_format)
 #'     styler:::pre_visit_one(pd, default_style_guide_attributes)
 #'   }
 #' )

R/nest.R

@@ -6,10 +6,17 @@
 #' @return A nested parse table. See [tokenize()] for details on the columns
 #'   of the parse table.
 #' @importFrom purrr when
-#' @keywords internal
+#' @examples
+#' code <- "
+#' ab     <- 1L # some comment
+#' abcdef <- 2L
+#' "
+#' writeLines(code)
+#' compute_parse_data_nested(code)
+#' @export
 compute_parse_data_nested <- function(text,
-                                      transformers,
-                                      more_specs) {
+                                      transformers = tidyverse_style(),
+                                      more_specs = NULL) {
   parse_data <- text_to_flat_pd(text, transformers, more_specs = more_specs)
   env_add_stylerignore(parse_data)
   parse_data$child <- rep(list(NULL), length(parse_data$text))

R/nested-to-tree.R

@@ -36,7 +36,7 @@ create_tree_from_pd_with_default_style_attributes <- function(pd,
 #'     list(styler.cache_name = NULL), # temporarily deactivate cache
 #'     {
 #'       code <- "a <- function(x) { if(x > 1) { 1+1 } else {x} }"
-#'       nested_pd <- styler:::compute_parse_data_nested(code)
+#'       nested_pd <- compute_parse_data_nested(code)
 #'       initialized <- styler:::pre_visit_one(
 #'         nested_pd, default_style_guide_attributes
 #'       )

R/rules-indention.R

@@ -18,7 +18,7 @@ indent_braces <- function(pd, indent_by) {
 #' @seealso set_unindention_child update_indention_ref_fun_dec
 #' @keywords internal
 unindent_fun_dec <- function(pd) {
-  if (is_function_dec(pd)) {
+  if (is_function_declaration(pd)) {
     idx_closing_brace <- which(pd$token %in% "')'")
     fun_dec_head <- seq2(2L, idx_closing_brace)
     pd$indent[fun_dec_head] <- 0L

R/rules-line-breaks.R

@@ -98,7 +98,7 @@ set_line_break_before_curly_opening <- function(pd) {
     should_not_be_on_same_line_idx <- line_break_to_set_idx[
       should_not_be_on_same_line
     ]
-    if (is_function_dec(pd)) {
+    if (is_function_declaration(pd)) {
       should_not_be_on_same_line_idx <- setdiff(
         1L + should_not_be_on_same_line_idx, nrow(pd)
       )
@@ -228,7 +228,7 @@ remove_line_break_before_round_closing_after_curly <- function(pd) {
 }
 
 remove_line_breaks_in_fun_dec <- function(pd) {
-  if (is_function_dec(pd)) {
+  if (is_function_declaration(pd)) {
     round_after <- (
       pd$token == "')'" | pd$token_before == "'('"
     ) &

R/rules-spaces.R

@@ -22,7 +22,7 @@ set_space_around_op <- function(pd_flat, strict) {
     !getOption("styler.ignore_alignment", FALSE) &&
       (
         (is_function_call(pd_flat) && sum_lag_newlines > 2L) ||
-          (is_function_dec(pd_flat) && sum_lag_newlines > 1L)
+          (is_function_declaration(pd_flat) && sum_lag_newlines > 1L)
       ) &&
       any(pd_flat$token %in% c("EQ_SUB", "','", "EQ_FORMALS"))
   ) {
@@ -96,10 +96,8 @@ style_space_around_token <- function(pd_flat,
     pd_flat$spaces[idx_before] <- level_before
     pd_flat$spaces[idx_after] <- level_after
   } else {
-    pd_flat$spaces[idx_before] <-
-      pmax(pd_flat$spaces[idx_before], level_before)
-    pd_flat$spaces[idx_after] <-
-      pmax(pd_flat$spaces[idx_after], level_after)
+    pd_flat$spaces[idx_before] <- pmax(pd_flat$spaces[idx_before], level_before)
+    pd_flat$spaces[idx_after] <- pmax(pd_flat$spaces[idx_after], level_after)
   }
   pd_flat
 }
@@ -110,12 +108,15 @@ style_space_around_tilde <- function(pd_flat, strict) {
       strict, "'~'",
       level_before = 1L, level_after = 1L
     )
-  } else if (is_asymmetric_tilde_expr(pd_flat)) {
+  }
+
+  if (is_asymmetric_tilde_expr(pd_flat)) {
     pd_flat <- style_space_around_token(pd_flat,
       strict = TRUE, "'~'", level_before = 1L,
       level_after = as.integer(nrow(pd_flat$child[[2L]]) > 1L)
     )
   }
+
   pd_flat
 }
 
@@ -286,7 +287,7 @@ start_comments_with_space <- function(pd, force_one = FALSE) {
       comments$text
     ) %>%
     trimws("right")
-  pd$short[is_comment] <- substr(pd$text[is_comment], 1, 5)
+  pd$short[is_comment] <- substr(pd$text[is_comment], 1L, 5L)
   pd
 }
 
@@ -345,20 +346,16 @@ remove_space_after_fun_dec <- function(pd_flat) {
 }
 
 remove_space_around_colons <- function(pd_flat) {
-  one_two_or_three_col_after <-
-    pd_flat$token %in% c("':'", "NS_GET_INT", "NS_GET")
-
-  one_two_or_three_col_before <-
-    lead(one_two_or_three_col_after, default = FALSE)
+  one_two_or_three_col_after <- pd_flat$token %in% c("':'", "NS_GET_INT", "NS_GET")
+  one_two_or_three_col_before <- lead(one_two_or_three_col_after, default = FALSE)
 
-  col_around <-
-    one_two_or_three_col_before | one_two_or_three_col_after
+  col_around <- one_two_or_three_col_before | one_two_or_three_col_after
 
   pd_flat$spaces[col_around & (pd_flat$newlines == 0L)] <- 0L
   pd_flat
 }
 
-#' Set space between EQ_SUB and "','"
+#' Set space between `EQ_SUB` and `"','"`
 #' @param pd A parse table.
 #' @keywords internal
 set_space_between_eq_sub_and_comma <- function(pd) {