表格的生命週期
libfort表生命週期：
- 建立一個表（使用預設建構函式、複製建構函式或移動建構函式）；
- 用資料填充它（運算子<<，運算子[],write_ln...）；
- 修改基本表外觀；
- 將錶轉換為字串表示（to_string）並列印出來。
在表生存期中分配的所有資源將在解構函式中自動釋放。
案例：
fort::char_table table;
table << fort::header
<< "N" << "Driver" << "Time" << "Avg Speed" << fort::endr
<< "1" << "Ricciardo" << "1:25.945" << "47.362" << fort::endr
<< "2" << "Hamilton" << "1:26.373" << "35.02" << fort::endr
<< "3" << "Verstappen" << "1:26.469" << "29.78" << fort::endr;
std::cout << table.to_string() << std::endl;
輸出：
+---+------------+----------+-----------+
| N | Driver | Time | Avg Speed |
+---+------------+----------+-----------+
| 1 | Ricciardo | 1:25.945 | 47.362 |
| 2 | Hamilton | 1:26.373 | 35.02 |
| 3 | Verstappen | 1:26.469 | 29.78 |
+---+------------+----------+-----------+
往表格中填充資料
在每個時刻，libfort表都有一個當前單元格——在下一次寫操作中將向其寫入資料。函式set_cur_cell和<<(fort::endr)操作可以用來改變當前單元格：
/* 將當前單元格設定為具有座標(row, col)的單元格 */
void set_cur_cell(size_t row, size_t col)
/* 將當前單元格設定為下一行(line)第一個單元格 */
table << fort::endr;
有很多函式可以用來將資料填充表格。所有用來寫資料的函式都是成對的：(function,function_ln)，其中function向一組連續的單元格寫入資料，function_ln做同樣的事情，並將當前單元格指標移動到下一行(line)的第一個單元格。
<<運算子
應用於libfort表的運算子（<<）稱為插入運算子。它將字串插入到表格單元格中。libfort內部使用std::stringstream將引數轉換為字串。如果要在表中插入某些自定義型別的引數，則應過載std::stringstream::operator<<。
案例：
fort::char_table table;
table << fort::header
<< "N" << "Driver" << "Time" << "Avg Speed" << fort::endr
<< "1" << "Ricciardo" << "1:25.945" << "47.362" << fort::endr
<< "2" << "Hamilton" << "1:26.373" << "35.02" << fort::endr
<< "3" << "Verstappen" << "1:26.469" << "29.78" << fort::endr;
std::cout << table.to_string() << std::endl;
輸出：
+---+------------+----------+-----------+
| N | Driver | Time | Avg Speed |
+---+------------+----------+-----------+
| 1 | Ricciardo | 1:25.945 | 222.128 |
| 2 | Hamilton | 1:26.373 | 221.027 |
| 3 | Verstappen | 1:26.469 | 220.782 |
+---+------------+----------+-----------+
[]運算子
此運算子（[]）提供了直接更改特定單元格內容的功能。
案例：
fort::char_table table;
table << fort::header;
table[0][0] = "N"; table[0][1] = "Driver"; table[0][2] = "Time"; table[0][3] = "Avg Speed";
table[1][0] = "1"; table[1][1] = "Ricciardo"; table[1][2] = "1:25.945"; table[1][3] = "47.362";
table[2][0] = "2"; table[2][1] = "Hamilton"; table[2][2] = "1:26.373"; table[2][3] = "35.02";
table[3][0] = "3"; table[3][1] = "Verstappen"; table[3][2] = "1:26.469"; table[3][3] = "29.78";
std::cout << table.to_string() << std::endl;
輸出：
+---+------------+----------+-----------+
| N | Driver | Time | Avg Speed |
+---+------------+----------+-----------+
| 1 | Ricciardo | 1:25.945 | 222.128 |
| 2 | Hamilton | 1:26.373 | 221.027 |
| 3 | Verstappen | 1:26.469 | 220.782 |
+---+------------+----------+-----------+
write, write_ln
write,write_ln可以向表單元寫入任意數量的字串引數。
案例：
fort::char_table table;
table << fort::header;
table.write_ln("N", "Driver", "Time", "Avg Speed");
table.write_ln("1", "Ricciardo", "1:25.945", "47.362");
table.write_ln("2", "Hamilton", "1:26.373", "35.02");
table.write_ln("3", "Verstappen", "1:26.469", "29.78");
std::cout << table.to_string() << std::endl;
輸出：
+---+------------+----------+-----------+
| N | Driver | Time | Avg Speed |
+---+------------+----------+-----------+
| 1 | Ricciardo | 1:25.945 | 222.128 |
| 2 | Hamilton | 1:26.373 | 221.027 |
| 3 | Verstappen | 1:26.469 | 220.782 |
+---+------------+----------+-----------+
range_write, range_write_ln
range_write,range_write_ln從由一對迭代器確定的容器中寫入資料。
案例：
template <typename InputIt>
bool range_write(InputIt first, InputIt last);
template <typename InputIt>
bool range_write_ln(InputIt first, InputIt last);
fort::char_table table;
table << fort::header;
std::vector<std::string> header = {"N", "Driver", "Time", "Avg Speed"};
std::list<std::string> line_1 = {"1", "Ricciardo", "1:25.945", "47.362"};
std::initializer_list<std::string> line_2 = {"2", "Hamilton", "1:26.373", "35.02"};
std::deque<std::string> line_3 = {"3", "Verstappen", "1:26.469", "29.78"};
table.range_write_ln(header.begin(), header.end());
table.range_write_ln(line_1.begin(), line_1.end());
table.range_write_ln(line_2.begin(), line_2.end());
table.range_write_ln(line_3.begin(), line_3.end());
std::cout << table.to_string() << std::endl;
輸出：
+---+------------+----------+-----------+
| N | Driver | Time | Avg Speed |
+---+------------+----------+-----------+
| 1 | Ricciardo | 1:25.945 | 222.128 |
| 2 | Hamilton | 1:26.373 | 221.027 |
| 3 | Verstappen | 1:26.469 | 220.782 |
+---+------------+----------+-----------+
單元格和表格的操作
預設情況下，在libfort表中建立的所有單元格都將具有相同的屬性。
要更改單元格屬性，應使用函式set_cell_{property_name}：
bool set_cell_min_width(unsigned value);
bool set_cell_text_align(enum fort::text_align value);
bool set_cell_top_padding(unsigned value);
bool set_cell_bottom_padding(unsigned value);
bool set_cell_left_padding(unsigned value);
bool set_cell_right_padding(unsigned value);
bool set_cell_empty_str_height(unsigned value);
bool set_cell_row_type(enum fort::row_type value);
bool set_cell_content_fg_color(enum fort::color value);
bool set_cell_bg_color(enum fort::color value);
bool set_cell_content_bg_color(enum fort::color value);
bool set_cell_text_style(enum fort::text_style value);
bool set_cell_content_text_style(enum fort::text_style value);
屬性可以設定為預設值（用於將來建立的表中的所有單元格）、用於指定表的所有單元格、用於指定某一行的單元格、用於指定某一列中的單元格以及用於指定表的特定單元格。
以下示例說明了這一點：
// 為以後建立的所有表格中的所有單元格設定top padding = 2
fort::table::default_props().set_cell_top_padding(2);
// 為第2行中的所有單元格設定行型別
table.row(2).set_cell_row_type(fort::row_type::header);
// 為第1列中的所有單元格設定文字對齊方式
table.column(1).set_cell_text_align(fort::text_align::center);
// 為單元格(0,0)，設定最小寬度
table[0][0].set_cell_min_width(20);
下面是一個簡單的完整示例：
fort::char_table table;
// Fill table with data
table << fort::header
<< "Rank" << "Title" << "Year" << "Rating" << fort::endr
<< "1" << "The Shawshank Redemption" << "1994" << "9.5" << fort::endr
<< "2" << "12 Angry Men" << "1957" << "8.8" << fort::endr
<< "3" << "It's a Wonderful Life" << "1946" << "8.6" << fort::endr
<< fort::endr;
table[0][0].set_cell_min_width(20);
table.column(1).set_cell_text_align(fort::text_align::center);
table[3][3].set_cell_left_padding(15);
std::cout << table.to_string() << std::endl;
輸出：
+--------------------+--------------------------+------+-------------------+
| Rank | Title | Year | Rating |
+--------------------+--------------------------+------+-------------------+
| 1 | The Shawshank Redemption | 1994 | 9.5 |
| 2 | 12 Angry Men | 1957 | 8.8 |
| 3 | It's a Wonderful Life | 1946 | 8.6 |
+--------------------+--------------------------+------+-------------------+
邊框的樣式
libfort有許多內建的邊框樣式。要更改libfort表的邊框樣式，可以使用set_default_bound_style、set_bound_style函式：
/* 更改將建立的所有libfort表的邊框樣式 */
bool set_default_border_style(struct ft_border_style *style);
/* 更改當前表格的邊框樣式 */
bool set_border_style(struct ft_border_style *style);
下面是一個建立表格和設定邊框樣式的簡單示例：
fort::char_table table;
/* Set table border style */
table.set_border_style(FT_BASIC_STYLE);
// Fill table with data
table << fort::header
<< "Rank" << "Title" << "Year" << "Rating" << fort::endr
<< "1" << "The Shawshank Redemption" << "1994" << "9.5" << fort::endr
<< "2" << "12 Angry Men" << "1957" << "8.8" << fort::endr
<< "3" << "It's a Wonderful Life" << "1946" << "8.6" << fort::endr
<< fort::separator
<< "4" << "2001: A Space Odyssey" << "1968" << "8.5" << fort::endr
<< "5" << "Blade Runner" << "1982" << "8.1" << fort::endr
<< fort::endr;
table.column(0).set_cell_text_align(fort::text_align::center);
table.column(1).set_cell_text_align(fort::text_align::left);
std::cout << table.to_string() << std::endl;
輸出：
+------+--------------------------+------+--------+
| Rank | Title | Year | Rating |
+------+--------------------------+------+--------+
| 1 | The Shawshank Redemption | 1994 | 9.5 |
| 2 | 12 Angry Men | 1957 | 8.8 |
| 3 | It's a Wonderful Life | 1946 | 8.6 |
+------+--------------------------+------+--------+
| 4 | 2001: A Space Odyssey | 1968 | 8.5 |
| 5 | Blade Runner | 1982 | 8.1 |
+------+--------------------------+------+--------+
style可選值
FT_BASIC_STYLE
+------+--------------------------+------+--------+
| Rank | Title | Year | Rating |
+------+--------------------------+------+--------+
| 1 | The Shawshank Redemption | 1994 | 9.5 |
| 2 | 12 Angry Men | 1957 | 8.8 |
| 3 | It's a Wonderful Life | 1946 | 8.6 |
+------+--------------------------+------+--------+
| 4 | 2001: A Space Odyssey | 1968 | 8.5 |
| 5 | Blade Runner | 1982 | 8.1 |
+------+--------------------------+------+--------+
FT_BASIC2_STYLE
+------+--------------------------+------+--------+
| Rank | Title | Year | Rating |
+------+--------------------------+------+--------+
| 1 | The Shawshank Redemption | 1994 | 9.5 |
+------+--------------------------+------+--------+
| 2 | 12 Angry Men | 1957 | 8.8 |
+------+--------------------------+------+--------+
| 3 | It's a Wonderful Life | 1946 | 8.6 |
+------+--------------------------+------+--------+
| 4 | 2001: A Space Odyssey | 1968 | 8.5 |
+------+--------------------------+------+--------+
| 5 | Blade Runner | 1982 | 8.1 |
+------+--------------------------+------+--------+
FT_SIMPLE_STYLE
Rank Title Year Rating
------ -------------------------- ------ --------
1 The Shawshank Redemption 1994 9.5
2 12 Angry Men 1957 8.8
3 It's a Wonderful Life 1946 8.6
------ -------------------------- ------ --------
4 2001: A Space Odyssey 1968 8.5
5 Blade Runner 1982 8.1
FT_PLAIN_STYLE
-------------------------------------------------
Rank Title Year Rating
-------------------------------------------------
1 The Shawshank Redemption 1994 9.5
2 12 Angry Men 1957 8.8
3 It's a Wonderful Life 1946 8.6
-------------------------------------------------
4 2001: A Space Odyssey 1968 8.5
5 Blade Runner 1982 8.1
FT_DOT_STYLE
...................................................
: Rank : Title : Year : Rating :
:......:..........................:......:........:
: 1 : The Shawshank Redemption : 1994 : 9.5 :
: 2 : 12 Angry Men : 1957 : 8.8 :
: 3 : It's a Wonderful Life : 1946 : 8.6 :
:......:..........................:......:........:
: 4 : 2001: A Space Odyssey : 1968 : 8.5 :
: 5 : Blade Runner : 1982 : 8.1 :
:......:..........................:......:........:
FT_EMPTY_STYLE
Rank Title Year Rating
1 The Shawshank Redemption 1994 9.5
2 12 Angry Men 1957 8.8
3 It's a Wonderful Life 1946 8.6
4 2001: A Space Odyssey 1968 8.5
5 Blade Runner 1982 8.1
FT_EMPTY2_STYLE
Rank Title Year Rating
1 The Shawshank Redemption 1994 9.5
2 12 Angry Men 1957 8.8
3 It's a Wonderful Life 1946 8.6
4 2001: A Space Odyssey 1968 8.5
5 Blade Runner 1982 8.1
FT_SOLID_STYLE
┌──────┬──────────────────────────┬──────┬────────┐
│ Rank │ Title │ Year │ Rating │
├──────┼──────────────────────────┼──────┼────────┤
│ 1 │ The Shawshank Redemption │ 1994 │ 9.5 │
│ 2 │ 12 Angry Men │ 1957 │ 8.8 │
│ 3 │ It's a Wonderful Life │ 1946 │ 8.6 │
├──────┼──────────────────────────┼──────┼────────┤
│ 4 │ 2001: A Space Odyssey │ 1968 │ 8.5 │
│ 5 │ Blade Runner │ 1982 │ 8.1 │
└──────┴──────────────────────────┴──────┴────────╯
FT_SOLID_ROUND_STYLE
╭──────┬──────────────────────────┬──────┬────────╮
│ Rank │ Title │ Year │ Rating │
├──────┼──────────────────────────┼──────┼────────┤
│ 1 │ The Shawshank Redemption │ 1994 │ 9.5 │
│ 2 │ 12 Angry Men │ 1957 │ 8.8 │
│ 3 │ It's a Wonderful Life │ 1946 │ 8.6 │
├──────┼──────────────────────────┼──────┼────────┤
│ 4 │ 2001: A Space Odyssey │ 1968 │ 8.5 │
│ 5 │ Blade Runner │ 1982 │ 8.1 │
╰──────┴──────────────────────────┴──────┴────────╯
FT_DOUBLE_STYLE
╔══════╦══════════════════════════╦══════╦════════╗
║ Rank ║ Title ║ Year ║ Rating ║
╠══════╬══════════════════════════╬══════╬════════╣
║ 1 ║ The Shawshank Redemption ║ 1994 ║ 9.5 ║
║ 2 ║ 12 Angry Men ║ 1957 ║ 8.8 ║
║ 3 ║ It's a Wonderful Life ║ 1946 ║ 8.6 ║
╠══════╬══════════════════════════╬══════╬════════╣
║ 4 ║ 2001: A Space Odyssey ║ 1968 ║ 8.5 ║
║ 5 ║ Blade Runner ║ 1982 ║ 8.1 ║
╚══════╩══════════════════════════╩══════╩════════╝
FT_DOUBLE2_STYLE
╔══════╤══════════════════════════╤══════╤════════╗
║ Rank │ Title │ Year │ Rating ║
╠══════╪══════════════════════════╪══════╪════════╣
║ 1 │ The Shawshank Redemption │ 1994 │ 9.5 ║
╟──────┼──────────────────────────┼──────┼────────╢
║ 2 │ 12 Angry Men │ 1957 │ 8.8 ║
╟──────┼──────────────────────────┼──────┼────────╢
║ 3 │ It's a Wonderful Life │ 1946 │ 8.6 ║
╠══════╪══════════════════════════╪══════╪════════╣
║ 4 │ 2001: A Space Odyssey │ 1968 │ 8.5 ║
╟──────┼──────────────────────────┼──────┼────────╢
║ 5 │ Blade Runner │ 1982 │ 8.1 ║
╚══════╧══════════════════════════╧══════╧════════╝
FT_BOLD_STYLE
┏━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━┳━━━━━━━━┓
┃ Rank ┃ Title ┃ Year ┃ Rating ┃
┣━━━━━━╋━━━━━━━━━━━━━━━━━━━━━━━━━━╋━━━━━━╋━━━━━━━━┫
┃ 1 ┃ The Shawshank Redemption ┃ 1994 ┃ 9.5 ┃
┃ 2 ┃ 12 Angry Men ┃ 1957 ┃ 8.8 ┃
┃ 3 ┃ It's a Wonderful Life ┃ 1946 ┃ 8.6 ┃
┣━━━━━━╋━━━━━━━━━━━━━━━━━━━━━━━━━━╋━━━━━━╋━━━━━━━━┫
┃ 4 ┃ 2001: A Space Odyssey ┃ 1968 ┃ 8.5 ┃
┃ 5 ┃ Blade Runner ┃ 1982 ┃ 8.1 ┃
┗━━━━━━┻━━━━━━━━━━━━━━━━━━━━━━━━━━┻━━━━━━┻━━━━━━━━┛
FT_BOLD2_STYLE
┏━━━━━━┯━━━━━━━━━━━━━━━━━━━━━━━━━━┯━━━━━━┯━━━━━━━━┓
┃ Rank │ Title │ Year │ Rating ┃
┣━━━━━━┿━━━━━━━━━━━━━━━━━━━━━━━━━━┿━━━━━━┿━━━━━━━━┫
┃ 1 │ The Shawshank Redemption │ 1994 │ 9.5 ┃
┠──────┼──────────────────────────┼──────┼────────┨
┃ 2 │ 12 Angry Men │ 1957 │ 8.8 ┃
┠──────┼──────────────────────────┼──────┼────────┨
┃ 3 │ It's a Wonderful Life │ 1946 │ 8.6 ┃
┣━━━━━━┿━━━━━━━━━━━━━━━━━━━━━━━━━━┿━━━━━━┿━━━━━━━━┫
┃ 4 │ 2001: A Space Odyssey │ 1968 │ 8.5 ┃
┠──────┼──────────────────────────┼──────┼────────┨
┃ 5 │ Blade Runner │ 1982 │ 8.1 ┃
┗━━━━━━┷━━━━━━━━━━━━━━━━━━━━━━━━━━┷━━━━━━┷━━━━━━━━┛
FT_FRAME_STYLE
▛▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▜
▌ Rank ┃ Title ┃ Year ┃ Rating ▐
▌━━━━━━╋━━━━━━━━━━━━━━━━━━━━━━━━━━╋━━━━━━╋━━━━━━━━▐
▌ 1 ┃ The Shawshank Redemption ┃ 1994 ┃ 9.5 ▐
▌ 2 ┃ 12 Angry Men ┃ 1957 ┃ 8.8 ▐
▌ 3 ┃ It's a Wonderful Life ┃ 1946 ┃ 8.6 ▐
▌━━━━━━╋━━━━━━━━━━━━━━━━━━━━━━━━━━╋━━━━━━╋━━━━━━━━▐
▌ 4 ┃ 2001: A Space Odyssey ┃ 1968 ┃ 8.5 ▐
▌ 5 ┃ Blade Runner ┃ 1982 ┃ 8.1 ▐
▙▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▟