Vs2013在Linux开发中的应用（26）：表达式计算
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当VS调试时将鼠标移到一个变量上面的时候，VS将显示这个变量的值，实际上这个时候VS进行了表达式的计算，我们所需要做的，就是把这个过程转换为gdb的命令：
| Operation | Description |
| -enable-pretty-printing | enable Python-based pretty-printing |
| -var-create | create a variable object |
| -var-delete | delete the variable object and/or its children |
| -var-set-format | set the display format of this variable |
| -var-show-format | show the display format of this variable |
| -var-info-num-children | tells how many children this object has |
| -var-list-children | return a list of the object’s children |
| -var-info-type | show the type of this variable object |
| -var-info-expression | print parent-relative expression that this variable object represents |
| -var-info-path-expression | print full expression that this variable object |
| represents | |
| -var-show-attributes | is this variable editable? does it exist here? |
| -var-evaluate-expression | get the value of this variable |
| -var-assign | set the value of this variable |
| -var-update | update the variable and its children |
| -var-set-frozen | set frozeness attribute |
| -var-set-update-range | set range of children to display on update |
经过转换，我们就可以在VS的窗口中看到表达式计算的结果了：
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