Function SI_CloneValue

src/value.c:134–172

Make an SIValue that creates its own copies of the original's allocations, if any. * This is not a deep clone: if the inner value holds its own references, * such as the Entity pointer to the properties of a Node or Edge, those are unmodified. */

 * This is not a deep clone: if the inner value holds its own references,
 * such as the Entity pointer to the properties of a Node or Edge, those are unmodified. */
SIValue SI_CloneValue(const SIValue v) {
	if(v.allocation == M_NONE) return v; // Stack value; no allocation necessary.

	if(v.type == T_STRING) {
		// Allocate a new copy of the input's string value.
		return SI_DuplicateStringVal(v.stringval);
	}

	if(v.type == T_ARRAY) {
		return SIArray_Clone(v);
	}

	if(v.type == T_PATH) {
		return SIPath_Clone(v);
	}

	if(v.type == T_MAP) {
		return Map_Clone(v);
	}

	// Copy the memory region for Node and Edge values. This does not modify the
	// inner Entity pointer to the value's properties.
	SIValue clone;
	clone.type = v.type;
	clone.allocation = M_SELF;

	size_t size = 0;
	if(v.type == T_NODE) {
		size = sizeof(Node);
	} else if(v.type == T_EDGE) {
		size = sizeof(Edge);
	} else {
		ASSERT(false && "Encountered heap-allocated SIValue of unhandled type");
	}

	clone.ptrval = rm_malloc(size);
	memcpy(clone.ptrval, v.ptrval, size);
	return clone;
}

SIValue SI_ShallowCloneValue(const SIValue v) {
	if(v.allocation == M_CONST || v.allocation == M_NONE) return v;