switch

Another flow control command
Usage
switch(<expression>)
{
    case(<value>)[:]<command>
    [break]
    case(<value>)[:]<command>
    [break]
    ....
    match(<wildcard_expression>)[:]<command>
    [break]
    ....
    regexp(<regular_expression>)[:]<command>
    [break]
    ....
    case(<value>)[:]<command>
    [break]
    ....
    default[:]<command>
    [break]
}
Description
The switch command is based on the standard C 'switch' keyword. It executes conditionally groups of commands choosen from a larger set of command groups.
First <expression> is evaluated (<expression> is any arithmetic or string expression).
Then the 'match','regexp','case' and 'default' labels are evaluated sequentially in the order of appearance.
case(<value>)[:]<command>
The <value> is evaluated and is compared against the result of <expression>. The comparison is case insensitive (if the values are strings).
If <value> is equal to <expression> then <command> is executed. Please note that <command> must be either a single instruction or an instruction block enclosed in braces. If <command> contains a break statement inside or if break is specified just after the <command> then the execution of the switch is terminated otherwise the nex label is evaluated.
match(<value>)[:]<command>
The <value> is expected to be a wildcard expression (containing '*' and '?' wildcards) that is matched against <expression>.
If there is a match (a complete case insensitive match!) then the related <command> is executed. brea is treated just like in the case label.
regexp(<value>)[:]<command>
The <value> is expected to be a complete standard regular expression that is matched agains <expression>.
If there is a match (a complete case insensitive match!) then the related <command> is executed. brea is treated just like in the case label.
default[:]<command>
The default label is executed unconditionally (unless there was a previous label that terminated the execution with break).
Syntax Specification
switch(<expression>)
{
    case(<value>)[:]<command>
    [break]
    case(<value>)[:]<command>
    [break]
    ....
    match(<wildcard_expression>)[:]<command>
    [break]
    ....
    regexp(<regular_expression>)[:]<command>
    [break]
    ....
    case(<value>)[:]<command>
    [break]
    ....
    default[:]<command>
    [break]
}
Examples
# Try to change the 1 below to 2 or 3 to see the results %tmp = 1 switch(%tmp) {     case(1):         echo \%tmp was 1!     break;     case(2)         echo \%tmp was 2!     break;     default:         echo \%tmp was not 1 nor 2: it was %tmp!     break; } # A complexier example: change the 1 in 2 or 3 %tmp = 1 switch(%tmp) {     case(1):         echo \%tmp was 1!     case(2)         echo \%tmp was 2!     break;     default:         echo \%tmp was either 1 or something different from 2 (%tmp)     break; } # An example with strings %tmp = "This is a test" %tmp2 = "This is not a test" switch(%tmp) {     case(%tmp2)         echo \%tmp == \%tmp2         break;     case(%tmp)     {         # do not break here         echo "Yeah.. it's stupid.. \%tmp == \%tmp :D"     }     match("*TEST"):         echo "Matched *TEST"     regexp("[a-zA-Z ]*test"):         echo "Matched [a-zA-Z ]*text"     regexp("[a-zA-Z ]*not[a-zA-Z ]*"):         echo "Matched [a-zA-Z ]*not[a-zA-Z ]*"     default:         echo This is executed anyway (unless some break was called)     break; }

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