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2 语法............................................................................................................................... .............................. 7
2.1 脚本、命令和单词符号............................................................................................................... 7
2.2 置换 (substitution) ......................................................................................................................... 7
2.2.1 变量置换(variable subtitution) ............................................................................................. 8
2.2.2 命令置换(command substitution) ......................................................................................... 8
2.2.3 反斜杠置换(backslash substitution) ..................................................................................... 9
2.2.4 双引号和花括号 ................................................................................................................. 10
2.3 注释 ............................................................................................................................... ............. 10
3 变量............................................................................................................................... ............................ 10
3.1 简单变量............................................................................................................................... ..... 10
3.2 数组 ............................................................................................................................... ............. 11
3.3 相关命令............................................................................................................................... ..... 12
3.3.1 set............................................................................................................................... ......... 12
3.3.2 unset............................................................................................................................... ..... 12
3.3.3 append 和incr ....................................................................................................................... 12
4 表达式............................................................................................................................... ........................ 13
4.1 操作数............................................................................................................................... ......... 13
4.2 运算符和优先级 ......................................................................................................................... 13
1.1 数学函数............................................................................................................................... ..... 14
2 List............................................................................................................................... ............................ 15
2.1 list命令 ............................................................................................................................... ......... 15
2.2 concat 命令: ............................................................................................................................... .. 16
2.3 lindex 命令 ............................................................................................................................... ... 16
2.4 llength 命令 ............................................................................................................................... .. 16
2.5 linsert 命令 ............................................................................................................................... ... 16
2.6 lreplace命令:...............................................................................................................................16
2.8 lappend命令 :...............................................................................................................................17
2.9 lsearch 命令: ...............................................................................................................................17
2.10 lsort 命令 : .................................................................................................................................... 17
2.11 split 命令: .................................................................................................................................... 18
2.12 join 命令 ............................................................................................................................... ....... 18
控制流............................................................................................................................... ........................ 18
3.1 if 命令 ............................................................................................................................... ........... 18
3.2 循环命令: while 、for、 foreach ............................................................................................. 19
3.2.1 while命令 ............................................................................................................................ 19
3.2.2 for命令 ............................................................................................................................... .19
3.2.3 foreach 命令 ......................................................................................................................... 20
3.2.4 break和continue命令.......................................................................................................... 20
3.2.5 switch 命令 ......................................................................................................................... 21
3.3 eval 命令 ............................................................................................................................... ....... 21
3.4 source 命令 ............................................................................................................................... ... 21
过程(procedure).................................................................................................................... ..................... 21
4.1 过程定义和返回值 ..................................................................................................................... 22
4.2 局部变量和全局变量................................................................................................................. 22
4.3 缺省参数和可变个数参数......................................................................................................... 23
4.4 引用: upvar ............................................................................................................................... 24
字符串操作............................................................................................................................... ............... 25
5.1 format 命令............................................................................................................................... ... 25
5.2 scan 命令 ............................................................................................................................... ...... 25
5.3 regexp 命令 ............................................................................................................................... ... 26
1.1 regsub 命令............................................................................................................................... ... 28
1.2 string命令 ............................................................................................................................... .... 28
1.2.1 string compare ? -nocase? ?-length int? string1 string2................................................... 28
1.2.2 string equal ? -nocase? ?-length int? string1 string2 ..................................................... 28
1.2.3 string first string1 string2 ? startindex ? ............................................................................ 29
1.2.4 string index string charIndex........................................................................................... 29
1.2.5 string last string1 string2 ?startindex? ....................... ....................... .......................... 29
1.2.6 string length string....................................................................................................... 29
1.2.7 string match ? -nocase? pattern string ............................................................................... 29
1.2.8 string range string first last ........................................................................................ 30
1.2.9 string repeat string count ............................................................................................. 30
1.2.10 string replace string first last ? newstring ?............................................................. 30
1.2.11 string tolower string ? first ? ? last ? .............................................................................. 30
1.2.12 string toupper string ?first ? ? last ?............................................................................. 30
1.2.13 string trim string ?chars? ........................................................................................... 30
1.2.14 string trimleft string ? chars?........................................................................................... 31
1.2.15 string trimright string ?chars? ................................................................................... 31
2 文件访问............................................................................................................................... ................... 31
2.1 文件名............................................................................................................................... ......... 31
2.2 基本文件输入输出命令............................................................................................................. 31
2.3 随机文件访问............................................................................................................................. 33
2.4 当前工作目录............................................................................................................................. 33
2.5 文件操作和获取文件信息......................................................................................................... 34
3 错误和异常............................................................................................................................... ............... 38
3.1 错误 ............................................................................................................................... ............. 38
3.2 从TCL 脚本中产生错误............................................................................................................. 40
3.3 使用 catch捕获错误.................................................................................................................... 40
3.4 其他异常............................................................................................................................... ..... 41
1 深入TCL............................................................................................................................... ..................... 43
1.1 查询数组中的元素 ..................................................................................................................... 43
1.2 info 命令............................................................................................................................... ....... 45
1.2.1 变量信息............................................................................................................................. 45
1.1.1 过程信息............................................................................................................................. 46
1.1.2 命令信息............................................................................................................................. 47
1.1.3 TCL 的版本和库................................................................................................................. 48
1.1.4 命令的执行时间 ................................................................................................................. 48
1.1.5 跟踪变量............................................................................................................................. 48
1.1.6 命令的重命名和删除 ......................................................................................................... 51
1.1.7 unknown 命令 ...................................................................................................................... 52
1.1.8 自动加载............................................................................................................................. 53 |
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