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-rw-r--r--libbuild2/functions-json.cxx48
1 files changed, 37 insertions, 11 deletions
diff --git a/libbuild2/functions-json.cxx b/libbuild2/functions-json.cxx
index d7265ba..ae5bd77 100644
--- a/libbuild2/functions-json.cxx
+++ b/libbuild2/functions-json.cxx
@@ -14,7 +14,7 @@ using namespace std;
namespace build2
{
static size_t
- find_index (const json_value& a, value v)
+ array_find_index (const json_value& a, value v)
{
if (a.type != json_type::array)
fail << "expected json array instead of " << to_string (a.type)
@@ -97,7 +97,7 @@ namespace build2
fail << "json object member expected instead of " << v.type << endf;
};
- // $size(<json>)
+ // $value_size(<json>)
//
// Return the size of a JSON value.
//
@@ -109,7 +109,7 @@ namespace build2
// string. To get the length call `$string.size()` instead by casting the
// JSON value to the `string` value type.
//
- f["size"] += [] (json_value v) -> size_t
+ f["value_size"] += [] (json_value v) -> size_t
{
// Note: should be consistent with value_traits<json_value>::empty(),
// json_subscript().
@@ -129,24 +129,50 @@ namespace build2
return 1;
};
- // $find(<json-array>, <json>)
+ // $array_size(<json-array>)
//
- // Return true if the JSON array contains the specified JSON value.
+ // Return the number of elements in the JSON array. If the JSON `null`
+ // value is passed instead, assume it is a missing array and return `0`.
//
- f["find"] += [](json_value a, value v)
+ f["array_size"] += [] (json_value a) -> size_t
{
- size_t i (find_index (a, move (v)));
+ if (a.type == json_type::null)
+ return 0;
+
+ if (a.type == json_type::array)
+ return a.array.size ();
+
+ fail << "expected json array instead of " << to_string (a.type) << endf;
+ };
+
+ // $array_find(<json-array>, <json>)
+ //
+ // Return true if the JSON array contains the specified JSON value. If the
+ // JSON `null` value is passed instead, assume it is a missing array and
+ // return `false`.
+ //
+ f["array_find"] += [] (json_value a, value v)
+ {
+ if (a.type == json_type::null)
+ return false;
+
+ size_t i (array_find_index (a, move (v)));
return i != a.array.size (); // We now know it's an array.
};
- // $find_index(<json-array>, <json>)
+ // $array_find_index(<json-array>, <json>)
//
// Return the index of the first element in the JSON array that is equal
- // to the specified JSON value or `$size(json-array)` if none is found.
+ // to the specified JSON value or `$array_size(<json-array>)` if none is
+ // found. If the JSON `null` value is passed instead, assume it is a
+ // missing array and return `0`.
//
- f["find_index"] += [](json_value a, value v)
+ f["array_find_index"] += [](json_value a, value v) -> size_t
{
- return find_index (a, move (v));
+ if (a.type == json_type::null)
+ return 0;
+
+ return array_find_index (a, move (v));
};
#ifndef BUILD2_BOOTSTRAP