TCL-如何在tcl过程中将字符串解释为多个参数? [英] TCL- How to interpret a string as multiple arguments in tcl procedures?

问题描述

我有一个过程，需要接受一定数量的参数来制作阵列.我有一个csv文件，其中包含每行中参数的信息.使用命令 [split $ line，] ，返回的信息之间带有空格，但过程将其视为一个参数而不是7或8个参数.如何获得csv行，例如:

I have a procedure that needs to accept a set amount of parameters to make arrays. I have a csv file with the information for the parameters on each line. Using the command [split $line ,], returns the information with spaces in between except that procedures treat it as one argument instead of 7 or 8 arguments. How can I get a csv line, such as the following:

 day-month-year,34,3,12,5,1,54,21,$big money

被视为多个参数，例如:

to be seen as multiple arguments such as:

 date num1 num2 num3 num4 num5 num6 num7 money

或类似以下的变体:

 day month year num1 ... num7 big money

split命令返回:

The split command returns:

 date num1 num2 num3 num4 num5 num6 num7 {big money}

这很好，除了将其视为单个参数.我的电话看起来像这样:

which is fine except that it is treated as a single argument. My call looks like this:

 procName [split $line ,]

谢谢.

推荐答案

如果您使用的是Tcl 8.5或更高版本:

If you are using Tcl version 8.5 or later:

procName {*}[split $line ,]

如果您使用的是Tcl 8.4版，则{*}构造尚不存在，您别无选择，只能执行以下操作:

If you are using Tcl version 8.4, the {*} construct was yet to exist, you have no choice, but to do something like:

eval procName [split $line ,]

请注意，评估可能不安全，特别是如果输入来自未知来源.

Be warned, the eval might be unsafe, especially if the input comes from unknown sources.

{*}构造称为参数扩展.我所知道的是这样的:

The {*} construct is called Argument Expansion. All I know about it is this:

procName {*}{a b c}

与以下相同:

procName a b c

此功能是在Tcl改进建议(TIP)中提出的 293 ，并在 Tcl'er Wiki 中进行了讨论.

This feature was proposed in the Tcl Improvements Proposal (TIP) 293 and was discussed in the Tcl'er Wiki.

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