Ты прав.«Простая разметка» является либо без отступа (не отформатированный), либо с отступом (отформатированный).Кроме того, текст без отступов находится в параграфах , разделенных символами новой строки.Вот почему вы заканчиваете пустыми строками между абзацами.
Вот краткое объяснение различных видов сообщений.Типы предупреждений и типы ошибок ведут себя так же, как форматированный и неформатированный текст.Разница, конечно, в том, что происходит с фазами обработки и генерации CMake.Для удобства чтения вы можете разбить строки на несколько частей в двойных кавычках, которые будут объединены.
# STATUS
message(STATUS
"This is a status message. It is prefixed with \"-- \". It goes to stdout. The "
"lines will wrap according to the width of your terminal.\n"
"New lines will begin a new line at column 1, but without the \"-- \" prefix, "
"unless you provide it; they will not create a blank line (i.e., new "
"paragraph). Spacing between sentences is unaltered by CMake.\n"
"-- Here's a new paragraph with an explicit \"-- \" prefix added.")
# no mode given (informational)
message(
"This is an informational message. It goes to stderr. Each line begins at column "
"1. The lines will wrap according to the width of your terminal.\n"
"New lines will begin a new line at column 1; they will not create a blank line "
"(i.e., new paragraph). Spacing between sentences is unaltered by CMake (3 spaces "
"preceded this sentence.).")
# WARNING--unformatted
message(WARNING
"This is an unformatted warning message. It goes to stderr. Each line begins "
"at column 3. The lines will wrap at a particular column (it appears to be "
"column 77, set within CMake) and wrap back to column 3.\n"
"New lines will begin a new paragraph, so they will create a blank line. A final "
"thing about unformatted messages: They will separate sentences with 2 spaces, "
"even if your string had something different.")
# WARNING--formatted and unformatted
message(WARNING
" This is a formatted warning message. It goes to stderr. Formatted lines will"
" be indented an additional 2 spaces beyond what was provided in the output"
" string. The lines will wrap according to the width of your terminal.\n"
" Indented new lines will begin a new line. They will not create a blank line."
" If you separate sentences with 1 space, that's what you'll get. If you"
" separate them with 2 spaces, that's also what you'll get.\n"
" If you want to control the width of the formatted paragraphs\n"
" (a good practice), just keep track of the width of each line and place\n"
" a \"\\n\" at the end of each line.\n \n"
" And, if you want a blank line between paragraphs, just place \"\\n \\n\"\n"
" (i.e., 2 newlines separated by a space) at the end of the first paragraph.\n"
"Non-indented new lines, however, will be treated like unformatted warning "
"messages, described above. They will begin at and wrap to column 3. They begin "
"a new paragraph, so they will create a blank line. There will be 2 spaces "
"between sentences, regardless of how many you placed after the period (In the "
"script, there were 4 spaces before this sentence).\n"
"And, as you'd expect, a second unindented paragraph will be preceded by a "
"blank line. But why would you mix formatted and unformatted text?")
Я сохранил это в Message.cmake и вызвал его с помощью cmake -P Message.cmake 2> output.txt.В результате получается следующий стандартный вывод:
-- This is a status message. It is prefixed with "-- ". It goes to stdout. The lines will wrap according to the width of your terminal.
New lines will begin a new line at column 1, but without the "-- " prefix, unless you provide it; they will not create a blank line (i.e., new paragraph). Spacing between sentences is unaltered by CMake.
-- Here's a new paragraph with an explicit "-- " prefix added.
Файл output.txt содержит:
This is an informational message. It goes to stderr. Each line begins at column 1. The lines will wrap according to the width of your terminal.
New lines will begin a new line at column 1; they will not create a blank line (i.e., new paragraph). Spacing between sentences is unaltered by CMake (3 spaces preceded this sentence.).
CMake Warning at MessageScript.cmake:19 (message):
This is an unformatted warning message. It goes to stderr. Each line
begins at column 3. The lines will wrap at a particular column (it appears
to be column 77, set within CMake) and wrap back to column 3.
New lines will begin a new paragraph, so they will create a blank line. A
final thing about unformatted messages: They will separate sentences with 2
spaces, even if your string had something different.
CMake Warning at MessageScript.cmake:28 (message):
This is a formatted warning message. It goes to stderr. Formatted lines will be indented an additional 2 spaces beyond what was provided in the output string. The lines will wrap according to the width of your terminal.
Indented new lines will begin a new line. They will not create a blank line. If you separate sentences with 1 space, that's what you'll get. If you separate them with 2 spaces, that's also what you'll get.
If you want to control the width of the formatted paragraphs
(a good practice), just keep track of the width of each line and place
a "\n" at the end of each line.
And, if you want a blank line between paragraphs, just place "\n \n"
(i.e., 2 newlines separated by a space) at the end of the first paragraph.
Non-indented new lines, however, will be treated like unformatted warning
messages, described above. They will begin at and wrap to column 3. They
begin a new paragraph, so they will create a blank line. There will be 2
spaces between sentences, regardless of how many you placed after the
period (In the script, there were 4 spaces before this sentence).
And, as you'd expect, a second unindented paragraph will be preceded by a
blank line. But why would you mix formatted and unformatted text?
РЕЗЮМЕ
ИНФОРМАЦИОННЫЕ СООБЩЕНИЯ (режим не указан)
- начинаться со столбца 1
- перенос в окне терминала до новой строки
- переход к stderr
- новые абзацы начинаются без предшествующей пустой строки
- предложение и интервал между словами сохраняются
СООБЩЕНИЯ СОСТОЯНИЯ
- начинаются со столбца 1, сПрефикс "-" в первом абзаце
- переносится в окне терминала до новой строки
- иди в стандартный вывод
- новые абзацы начинаются без предшествующей пустой строки
- предложение иинтервал между словами сохранен
НЕФОРМИРОВАННЫЕ СООБЩЕНИЯ О ПРЕДУПРЕЖДЕНИИ И ОШИБКАХ (строки без отступов)
- начало в столбце 3
- перенос в столбец 77
- перейти к stderr
- новым абзацам предшествует пустая строка
- предложения, разделенные двумя пробелами;слова на 1 пробел
ФОРМАТИРОВАННЫЕ ПРЕДУПРЕЖДЕНИЯ И СООБЩЕНИЯ ОБ ОШИБКАХ (строки с отступами)
- начинаются со столбца 3 плюс любой отступ, который имела строка
- перенос в окне терминала до новой строки
- переход к stderr
- новые абзацы начинаются без предшествующей пустой строки
- предложение и интервал слов сохраняются