From 8635dab4c38fcd67962819224093d0be95f5ed43 Mon Sep 17 00:00:00 2001
From: Chris Loer <chris.loer@gmail.com>
Date: Thu, 8 Feb 2018 15:23:29 -0800
Subject: [core] Implement Expression::serialize() Issue #10714 - Each
 expression stores its operator as a string, and default serialization is
 [operator, serialize(child1), ...] - Custom implementations of `serialize`
 for Expression types that don't follow the pattern - expression::Value ->
 mbgl::Value converter - node_expression bindings to expose `serialize`

---
 src/mbgl/style/expression/let.cpp | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

(limited to 'src/mbgl/style/expression/let.cpp')

diff --git a/src/mbgl/style/expression/let.cpp b/src/mbgl/style/expression/let.cpp
index fe48138ac3..242a995b0b 100644
--- a/src/mbgl/style/expression/let.cpp
+++ b/src/mbgl/style/expression/let.cpp
@@ -65,6 +65,17 @@ ParseResult Let::parse(const Convertible& value, ParsingContext& ctx) {
     return ParseResult(std::make_unique<Let>(std::move(bindings_), std::move(*result_)));
 }
 
+mbgl::Value Let::serialize() const {
+    std::vector<mbgl::Value> serialized;
+    serialized.emplace_back(getOperator());
+    for (auto entry : bindings) {
+        serialized.emplace_back(entry.first);
+        serialized.emplace_back(entry.second->serialize());
+    }
+    serialized.emplace_back(result->serialize());
+    return serialized;
+}
+
 EvaluationResult Var::evaluate(const EvaluationContext& params) const {
     return value->evaluate(params);
 }
@@ -95,6 +106,10 @@ ParseResult Var::parse(const Convertible& value_, ParsingContext& ctx) {
     return ParseResult(std::make_unique<Var>(name_, std::move(*bindingValue)));
 }
 
+mbgl::Value Var::serialize() const {
+    return std::vector<mbgl::Value>{{ getOperator(), name }};
+}
+
 } // namespace expression
 } // namespace style
 } // namespace mbgl
-- 
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