BUG: Matlab - reading toml file encoutering error message.

[inwoo-park]

Hi Developer,

Thank you for your great works on reading toml file using matlab.

Problem

When I use your project for reading "*.toml" file, I encounter the error as follows

>> fname = 'example.toml';
>> decode(fname);

Error: File: TOML_MATLAB_ROOT/toml/private/consume_comment.m Line: 10 Column:
40
Invalid expression. Check for missing multiplication operator, missing or unbalanced delimiters, or other syntax
error. To construct matrices, use brackets instead of parentheses.

Error in decode (line 17)
    toml_str = consume_comment(toml_str);

A Line 10 in consume_comment.m contains char(0xD). My current matlab version is 2018a. It seems that matlab version is not a source of problem.

What is meaing of char(0xD)? It seems that you convert the ASCII digit to text format (https://www.programming-algorithms.net/article/40286/ASCII-table).
For example, 0xD means CR(Carriage Return) in text.

if c == newline || (c == char(0xD) && idx < numel(out) && out(idx+1) == newline)

Solution

I find a solution for above problem.

It seems that function hex2dec in matlab (version < R2020a) does not support prefix 0x. For example, hex2dec('0xFF') is equal to hex2dec('FF').

hex2dec('FF') # supported since R2006a
hex2dec('0xFF') # supported since R2020a

Finally, the code should be changed to

if c == newline || (c == char(hex2dec('D')) && idx < numel(out) && out(idx+1) == newline)

Best regards,
Inwoo

[g-s-k]

Hi!

Thanks for your detailed analysis of the code. However, I have not found this problem before (even though I was initially working on this library on R2016a).

I suspect that you are encountering this problem because you are using the decode function with a filename. To read a file, try using the read function instead. decode is intended to parse data directly out of a MATLAB char type.

Best,
George