Is it possible to comment out blocks of code that contain comments?

C

8

15

Say I have code like this

some_line_of_code
some_line_of_code
/* some comment about code */
some_line_of_code
some_line_of_code

and i would like to comment out a whole block like this

/*
    some_line_of_code
    some_line_of_code
    /* some comment about code */
    some_line_of_code
    some_line_of_code
*/

As you can see even SO code parser will not consider last 2 lines of code comments. Is it possible to comment out blocks of code that contain comments?

edit : To clarify, I need this to be able to comment out large sections of code to check if a function I changed can compile in a package that otherwise can't be compiled until all changes have been done.

Cyd answered 21/5, 2015 at 13:45 Comment(4)

Not sure what IDE you are using, but there are some with great shortcuts. For instance - I highlight every line no matter the comments in between and once I hit Cntrl+/ .... Bam! All lines have been commented. Like I said though, this is an IDE specific – Casework 21/5, 2015 at 13:54

I am so used to having such functionality in Visual studio, but i'm new to Oracle SQL Developer which im using atm. Which ide were u refering to that allows this ctrl+/? – Physicist 21/5, 2015 at 13:56

JetBrains has the best IDE in my opinion. There are many versions for different types of work. I work with PHP mostly so I use PHPStorm which works nicely with SQL, JS, HTML. Check out products here - jetbrains.com/products.html?fromMenu – Casework 21/5, 2015 at 14:1

Since you focus on SQL this blog may pertain to you blog.jetbrains.com/blog/2014/06/09/… – Casework 21/5, 2015 at 14:6

K

31

In SQL Developer, I highlight all lines of PL/SQL that I want commented and use Ctrl + /.

Obviously, you would like a way to comment and uncomment multiple lines quickly. This will put -- in front of each line you have highlighted. Do the same command to uncomment.

Kluge answered 8/9, 2016 at 16:17 Comment(0)

A

6

you can assign a function key through Tools > Preferences > Key Configuration (Edit / Selection / Comment Lines).

Aprilette answered 31/3, 2020 at 8:48 Comment(1)

Exactly what I was needed. Thanks a lot. – Reggiereggis 19/4, 2020 at 14:46

T

4

Shortcut to comment a line: Command + Option + / (in Mac)

Tortoni answered 4/10, 2019 at 19:7 Comment(0)

A

3

As was stated by @Acroneos, there is no way. This is common behaviour of most programming languages. Comments as well as oher tokens are recognized by lexers. And lexers work with context-free grammars. i.e. lexes usually can recognize only reqular expressions.

You can still use C/C++ approach (#if 0/#endif). See Conditional compilation. But it does not look "so nice".

begin
 something1;
 $if false $then
  something2;
 $endif;
endl;

Aldine answered 21/5, 2015 at 14:2 Comment(0)

D

1

you can use --

so this code :

some_line_of_code some_line_of_code -- some comment about code some_line_of_code some_line_of_code

will be :

--some_line_of_code --some_line_of_code ---- some comment about code --some_line_of_code --some_line_of_code

Dotation answered 21/5, 2015 at 13:53 Comment(4)

Regardless of it working or not, it is far from fast and elegant way to comment out large sections of code to check if your function can compile. – Physicist 21/5, 2015 at 13:58

This approach work perfectly with Emacs. By executing uncomment-region on selected region, only one level comments is removed. And of course comment-region will add one level of single line comments to every selected line. – Aldine 21/5, 2015 at 14:5

I always use VS / SublimeText, and both of these editors have this feature of adding comments, on vb it's a (quote), on C++ it's // – Dotation 21/5, 2015 at 14:39

You tagged* your question as "oracle/plsql", what code are you trying to comment out ? isn't it a plsql ? – Dotation 21/5, 2015 at 14:58

T

0

No, because everything between first delimiter until the next last delimiter will be recognized as comment (=not processed by compiler). Thats how multiline-comments work: If first delimiter (/ * ) is recognized, compiler will ignore anything until the very next last delimiter ( * /) is recognized. Now as you know this, you should be able to understand, why your second / * will never be recognized as a comment-delimiter by the compiler.

However, you can mark comments with special characters or concatenations within the multiline-comment-sector to line out comments into different sections.

Transitory answered 21/5, 2015 at 13:48 Comment(0)

C

0

in sql developer ; default shortcut is : ctrl + shift + c

Congressional answered 3/8, 2022 at 11:34 Comment(0)

P

0

In Sql Developer,You can use the following commands...

For Commenting Sql Statements... ctl and / keys
For un-commenting Sql Statements... ctl and / keys again
Additionally, to format sql statement ctl and F7

Peonage answered 7/8, 2022 at 2:48 Comment(0)

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