Why am I getting "missing operand" from get_line()?

Why am I getting "missing operand" from get_line()?

[John Smith]

This is my code:

-- run_time_entry.adb:

with Ada.Text_IO.Unbounded_IO;
with Ada.Text_IO;

procedure Run_Time_Entry is
  First_Name : Ada.Strings.Unbounded.Unbounded_String;
  Last_Name  : Ada.Strings.Unbounded.Unbounded_String;
begin
  Ada.Text_IO.Put("Hello.  What is your first name => ");
  First_Name := Ada.Text_IO.Unbounded_IO.Get_Line();
  Ada.Text_IO.Put("What is your last name => ");
  Last_Name  := Ada.Text_IO.Unbounded_IO.Get_Line();

  Ada.Text_IO.Put("Nice to meet you ");
  Ada.Text_IO.Unbounded_IO.Put(First_Name);
  Ada.Text_IO.Put("  ");
  Ada.Text_IO.Unbounded_IO.Put_Line(Last_Name);
end Run_Time_Entry;




This is what happens when I compile it:

> gnatmake -g .\run_time_entry.adb
gcc -c -I.\ -g -I- .\run_time_entry.adb
run_time_entry.adb:11:51: missing operand
run_time_entry.adb:13:51: missing operand
gnatmake: ".\run_time_entry.adb" compilation error

Lines 11 and 13 is where I call Get_Line.  I don't understand, the reference manual (for 2012) says that this function ought to exist and it returns a string.

What am I missing?

Re: Why am I getting "missing operand" from get_line()?

[Egil H H]

On Monday, May 30, 2016 at 10:31:23 PM UTC+2, John Smith wrote:
> Lines 11 and 13 is where I call Get_Line.  I don't understand, the reference manual (for 2012) says that this function ought to exist and it returns a string.
> 
> What am I missing?

Parameterless subprograms don't take parenthesis in Ada

-- 
~egilhh

Re: Why am I getting "missing operand" from get_line()?

[John Smith]

On page 459 of the 2012 reference manual, on the last line, I can clearly see that Get_Line() does not take any inputs and returns an unbounded string.

Re: Why am I getting "missing operand" from get_line()?

[Jeffrey R. Carter]

On 05/30/2016 04:09 PM, John Smith wrote:
> On page 459 of the 2012 reference manual, on the last line, I can clearly see
> that Get_Line() does not take any inputs and returns an unbounded string.

I'm not sure what you're trying to say. Section 6.4 shows the syntax for a
function call. Your code differs from that syntax.

-- 
Jeff Carter
"When danger reared its ugly head, he bravely
turned his tail and fled."
Monty Python and the Holy Grail
60

Re: Why am I getting "missing operand" from get_line()?

[John Smith]

On Monday, May 30, 2016 at 7:59:53 PM UTC-4, Jeffrey R. Carter wrote:
> On 05/30/2016 04:09 PM, John Smith wrote:
> > On page 459 of the 2012 reference manual, on the last line, I can clearly see
> > that Get_Line() does not take any inputs and returns an unbounded string.
> 
> I'm not sure what you're trying to say. Section 6.4 shows the syntax for a
> function call. Your code differs from that syntax.
> 
> -- 
> Jeff Carter
> "When danger reared its ugly head, he bravely
> turned his tail and fled."
> Monty Python and the Holy Grail
> 60

I'm talking about A.10.12.

Re: Why am I getting "missing operand" from get_line()?

[Egil H H]

On Tuesday, May 31, 2016 at 1:09:17 AM UTC+2, John Smith wrote:
> On page 459 of the 2012 reference manual, on the last line, I can clearly see that Get_Line() does not take any inputs and returns an unbounded string.

No, you can clearly see that Get_Line does not take any inputs and returns an unbounded string. Like I said, it does not take parenthesis

Re: Why am I getting "missing operand" from get_line()?

[Niklas Holsti]

On 16-05-31 08:40 , Egil H H wrote:
> On Tuesday, May 31, 2016 at 1:09:17 AM UTC+2, John Smith wrote:
>> On page 459 of the 2012 reference manual, on the last line, I can
>> clearly see that Get_Line() does not take any inputs and returns an
>> unbounded string.
>
> No, you can clearly see that Get_Line does not take any inputs and
> returns an unbounded string. Like I said, it does not take
> parenthesis

Just to make it very clear: a parameterless call in Ada consists of just 
the subprogram name, without any ().

Do not write:

   First_Name := Ada.Text_IO.Unbounded_IO.Get_Line();

Do write:

   First_Name := Ada.Text_IO.Unbounded_IO.Get_Line;

HTH,

-- 
Niklas Holsti
Tidorum Ltd
niklas holsti tidorum fi
       .      @       .

Re: Why am I getting "missing operand" from get_line()?

[daserlang]

On Monday, May 30, 2016 at 4:36:28 PM UTC-4, Egil H H wrote:
> On Monday, May 30, 2016 at 10:31:23 PM UTC+2, John Smith wrote:
> > Lines 11 and 13 is where I call Get_Line.  I don't understand, the reference manual (for 2012) says that this function ought to exist and it returns a string.
> > 
> > What am I missing?
> 
> Parameterless subprograms don't take parenthesis in Ada
> 
> -- 
> ~egilhh

Yes, you are correct.  Your answer became more obvious after I returned to the problem with a fresh head.

Thank you.

Re: Why am I getting "missing operand" from get_line()?

[mockturtle]

> 
> Parameterless subprograms don't take parenthesis in Ada
> 

It is almost like trying to exit from vi with C-x C-c... :-) (I could not resist)