I have define an immutable string array:

[code]
immutable string[] placeHolderDefinitionList = [
        "<!-- fullname -->",
        "<!-- list item -->"
];
[/code]

I need to get index of a string at compile time. So I have written a function as below:

[code]
public size_t getPlaceholderIndex(string PlaceHolderText)( size_t lookIndex = 0 ){
        static if( lookIndex >= placeHolderDefinitionList.length )
                return size_t.max;

static if( placeHolderDefinitionList[lookIndex] == PlaceHolderText )
                return lookIndex;
        else
                return getPlaceholderIndex( lookIndex + 1 );
}
[/code]

Called it as below:

[code]
writeln( "Index: ", getPlaceholderIndex!"<!-- list item -->"( 0 ) );
[/code]

Compiler didn't like my code. It said those things to my face:

main.d(22): Error: variable lookIndex cannot be read at compile time main.d(25): Error: variable lookIndex cannot be read at compile time main.d(28): Error: template main.getPlaceholderIndex cannot deduce function from argument types !()(ulong), candidates are: main.d(21): main.getPlaceholderIndex(string PlaceHolderText)(size_t lookIndex = 0) main.d(105): Error: template instance main.getPlaceholderIndex!"<!-- list item -->" error instantiating

This is my first try with this type of code. So I am confused a little about what I should be doing.

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