Data types

Sun currently stores real scalars, complex scalars, and dense numeric matrices as MATLAB-compatible double values. Logical and string values are scalar-only, and runtime exceptions use the SunException class.

• double: real scalars, complex scalars, and dense f64 matrices
• logical: boolean scalars
• string: UTF-8 text scalars
• SunException: caught runtime exceptions

class returns the exact runtime class. isa accepts exact names and the MATLAB numeric categories numeric, float, and integer.

disp(class(3.5));              % double
disp(class(true));             % logical
disp(isa([1, 2], "numeric")); % true
disp(isa(1, "integer"));     % false

double preserves real, complex, and matrix values and converts logical scalars to 0 or 1. Text conversion is intentionally deferred because Sun does not yet distinguish character arrays from string arrays.

value = double(true);
disp(value);         % 1
disp(class(value));  % double

• Typed dense arrays for logical, single, half, and signed or unsigned integers
• Separate character arrays and string arrays
• Dates, durations, and categorical arrays
• Cells, structures, tables, and timetables
• Function handles, dictionaries, and time series