asked on

How does C# allow for blank assignments? MyVariable = <-------- compiles

Greetings:

I'm reviewing code written by another developer and I've noticed blocks of code that will have no value/object to the right of the variable that needs assignment, like:

if (TSMIAllPasswords.Checked || _searching)
{
bool localro = _password.IsReadOnly;
TBDomain.ReadOnly =
TBUsername.ReadOnly =
TBNotes.ReadOnly =
TBPassword.ReadOnly = localro;
DTPExpire.Enabled = !localro && _password.Expire;
BGenerate.Enabled =
CBExpire.Enabled = !localro;
}
else
{
TBDomain.ReadOnly =
TBUsername.ReadOnly =
TBNotes.ReadOnly =
TBPassword.ReadOnly = _sectionRO;
DTPExpire.Enabled =
BGenerate.Enabled =
CBBExpire.Enabled = _sectionRO;
}
}

How is it that this compiles?? During execution I certainly get an error that

ASKER CERTIFIED SOLUTION

mastoo

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silemone

they are not blank assignments...they are saying a = b = c = "ssfds;

silemone

so in essence they all have the same value until you reach the ; (semicolon)...

silemone

equates to:

a = b = c = d = "hello";

shorthand for
a="hello";
b="hello";
.
.
.
d= "hello";

Arthur_Wood

Just to make it clear, in C#, a line will AUTOMATICALLY be continued until a line termination character (;) is encountered. Thus

TBDomain.ReadOnly =
TBUsername.ReadOnly =
TBNotes.ReadOnly =
TBPassword.ReadOnly = localro;

is EXACTLY the same as:

TBDomain.ReadOnly = TBUsername.ReadOnly = TBNotes.ReadOnly = TBPassword.ReadOnly = localro;

the white space is ignored, by the C# compiler.

AW

joesthebighmoe

They are continuations, not blank.
Oh wait, that is what mastoo already said 20 minutes ago.

How does C# allow for blank assignments? MyVariable = &lt;-------- compiles

How does C# allow for blank assignments? MyVariable = <-------- compiles