The ovm_float_t type

The ovm_float_t type is the OrchIDS incarnation of the data type double of 64-bit floating point values.

It is defined this way in src/lang.h:

typedef struct ovm_float_s ovm_float_t;
struct ovm_float_s
  gc_header_t gc;
  double     val;

This is a type of garbage-collectable data. To allocate a new object of type ovm_float_t, use the function:

ovm_var_t *ovm_float_new(gc_t *gc_ctx, double val);

This creates a new ovm_float_t object with value val. Its return type is the universal type ovm_var_t instead of ovm_double_t, for practical reasons. Calling res the result, one always has TYPE(res)==T_FLOAT.

The result is created white, and much be gc_touch()ed before storing it into a garbage-collectable object.

The returned ovm_float_t object res is modifiable. One can read from or write from it by using the FLOAT() macro (e.g., double x=FLOAT(res); FLOAT(res) = 3.5;).