[mesa-users] Inline Comments in Namelists

[Richard Townsend]

In fact, neither are correct: both should throw an error when the space is missing, I think.

> On May 8, 2015, at 8:08 AM, Richard Townsend <townsend at astro.wisc.edu> wrote:
> 
> Thanks for finding this. So, gfortran is consistent with the standard, whereas ifort is not…
> 
>> On May 8, 2015, at 7:57 AM, Tomasz Plewa <tomekplewa at gmail.com <mailto:tomekplewa at gmail.com>> wrote:
>> 
>> As per the Fortran standard, a comment starts with "!" either at the beginning of the record or after a value separator. So I am guessing adding a blank space, which in this case serves as a value (3.14) separator, fixes the problem.
>> 
>> Tomek
>> --
>> 
>> 10.11.3.2 Namelist input processing
>> 
>> 4 A namelist comment may appear after any value separator except a slash. A namelist comment is also permitted
>> to start in the first nonblank position of an input record except within a character literal constant.
>> 
>> 10.11.3.6 Namelist comments
>> 
>> 1 Except within a character literal constant, a “!” character after a value separator or in the first nonblank position
>> of a namelist input record initiates a comment. The comment extends to the end of the record and may contain
>> any graphic character in the processor-dependent character set. The comment is ignored. A slash within the
>> namelist comment does not terminate execution of the namelist input statement. Namelist comments are not
>> allowed in stream input because comments depend on record structure.
>> 
>> 10.10.2
>> 
>> 3 A value separator is
>> • a comma optionally preceded by one or more contiguous blanks and optionally followed by one or more
>> contiguous blanks, unless the decimal edit mode is COMMA, in which case a semicolon is used in place of
>> the comma,
>> • a slash optionally preceded by one or more contiguous blanks and optionally followed by one or more
>> contiguous blanks, or
>> • one or more contiguous blanks between two nonblank values or following the last nonblank value, where a
>> nonblank value is a constant, an r*c form, or an r* form.
>> 
>> 
>> On 05/07/15 20:10, Josiah Schwab wrote:
>>> Hi All,
>>> 
>>>> I was wondering why I have not seen this.  I often use inline comments
>>>> within inlists to show values I have tried or plan to try.  But, I
>>>> always place a space before and after the ! to make it easier on my
>>>> old eyes.
>>> Yes, sorry, I should have made this more clear.
>>> 
>>>   val = 3.14 !2.78
>>> 
>>> appears to be fine with both ifort and gfortran.
>>> 
>>> I almost always offset my inline comments with a space as well.  Except
>>> one time I didn't, and there went my afternoon ... :)
>>> 
>>> Josiah
>>> 
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