Wrong indentation with t4 templates

Question

I'm currently working with T4 templates and I have noticed that sometimes the code is not indented properly, how can I avoid that?

For instance I have this code in the template

}
    <# } #>
    this.cmbDecisionList.Dat = dataSource;
    this.btnDec.Enabled = dataSource.Count > 0;
}

and in the generated class it's like

}
                 this.cmbDecisionList.Dat = dataSource;
      this.btnDec.Enabled = dataSource.Count > 0;
}

Lippizaner

I usually avoided it by making my T4 template more ugly and removing whitespaces in that, so my generated code looked more pretty. :) – Blair

Yes but it complicated to understand... – Lippizaner

Usually generated code is not intended to be read, but i know your desire to have nice looking code, even if it's generated automatically. Besides changing your T4 template you can also use the "Format Document" option in the "Edit" > "Advanced" Menu on your output file. And as far as I know tangible's T4 Editor has a "Format output" option when generating code. – Catercorner

Answer 1

Allow me to illustrate your problem by replacing spaces with dots.

}
....<# } #>
....this.cmbDecisionList.Dat = dataSource;
    this.btnDec.Enabled = dataSource.Count > 0;
}

and in the generated class it's like

}
........this.cmbDecisionList.Dat = dataSource;
    this.btnDec.Enabled = dataSource.Count > 0;
}

Now, let us remove the preceding dots.

}
<# } #>
....this.cmbDecisionList.Dat = dataSource;
    this.btnDec.Enabled = dataSource.Count > 0;
}

and in the generated class it's like

}
....this.cmbDecisionList.Dat = dataSource;
    this.btnDec.Enabled = dataSource.Count > 0;
}

Anticoagulant

I could almost cry at the sight of such a simple but accurate description of the solution to this problem which has been bothering me for quite some time now. Thank you. – Woolsack

Answer 2

I think it's good that you strive for readable generated code. We will sit and try to debug the generated code occassionally so it's good if it's easy on the eyes (ofc we never edit the generated code).

I have adopted a pattern where I might sacrifice some readability of the template to gain generated code readability.

Generated code
<#
    T4 statements
#>
Generated code

IE #> always appear after a newline and a newline is added immedietly after.

Your code then would be changed into:

}
<# 
    } 
#>
    this.cmbDecisionList.Dat = dataSource;
    this.btnDec.Enabled = dataSource.Count > 0;
}

That way the generated code tends to be formatted as intended.

It's probably not the only way to retain the formatting as intended but it's the one I use.

Hope this helps.

Ashram