Function _replace_with_clause

src/ast/ast_rewrite_call_subquery.c:121–196

replaces a `WITH` clause, placed in clause_idx within `callsubquery`, with a new `WITH` clause containing projections of `names` to `inter_names`

// replaces a `WITH` clause, placed in clause_idx within `callsubquery`, with a
// new `WITH` clause containing projections of `names` to `inter_names`
static void _replace_with_clause
(
	cypher_astnode_t *callsubquery,  // call subquery ast-node
	uint clause_idx,                 // index of clause to replace
	char **names,                    // original bound vars
	char **inter_names               // internal representation of bound vars
) {
	cypher_astnode_t *query =
		cypher_ast_call_subquery_get_query(callsubquery);
	const cypher_astnode_t *clause = cypher_ast_query_get_clause(query,
		clause_idx);

	uint existing_projections_count = cypher_ast_with_nprojections(clause);
	uint n_projections = array_len(inter_names) + existing_projections_count;
	uint proj_idx = 0;
	cypher_astnode_t *projections[n_projections];

	//--------------------------------------------------------------------------
	// create projections for bound vars
	//--------------------------------------------------------------------------

	proj_idx = _add_projections(projections, proj_idx, names, inter_names,
		true);

	//--------------------------------------------------------------------------
	// introduce explicit projections
	//--------------------------------------------------------------------------

	// clone explicit projections into projections array
	for(uint i = 0; i < existing_projections_count; i++) {
		const cypher_astnode_t *projection =
			cypher_ast_with_get_projection(clause, i);
		projections[proj_idx++] = cypher_ast_clone(projection);
	}

	// copy projections to the children array
	cypher_astnode_t *children[n_projections + 4];
	for(uint i = 0; i < n_projections; i++) {
		children[i] = projections[i];
	}

	//--------------------------------------------------------------------------
	// prepare additional arguments
	//--------------------------------------------------------------------------

	bool                    distinct  = false;
	const cypher_astnode_t  *skip     = NULL;
	const cypher_astnode_t  *limit    = NULL;
	const cypher_astnode_t  *order_by = NULL;
	const cypher_astnode_t  *pred     = NULL;

	skip     = cypher_ast_with_get_skip(clause);
	limit    = cypher_ast_with_get_limit(clause);
	distinct = cypher_ast_with_is_distinct(clause);
	order_by = cypher_ast_with_get_order_by(clause);
	pred     = cypher_ast_with_get_predicate(clause);

	// clone any ORDER BY, SKIP, LIMIT, and WHERE modifiers to