Implement BigDecimal.from_yaml (#7398)

crystal-lang · Feb 10, 2019 · 80b41fe · 80b41fe
1 parent 4e0f731
commit 80b41fe
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diff --git a/spec/std/yaml/serialization_spec.cr b/spec/std/yaml/serialization_spec.cr
@@ -149,6 +149,12 @@ describe "YAML serialization" do
       big.should eq(BigFloat.new("1234.567891011121314"))
     end
 
+    it "does for BigDecimal" do
+      big = BigDecimal.from_yaml("1234.567891011121314")
+      big.should be_a(BigDecimal)
+      big.should eq(BigDecimal.new("1234.567891011121314"))
+    end
+
     it "does for Enum with number" do
       YAMLSpecEnum.from_yaml(%("1")).should eq(YAMLSpecEnum::One)
 

diff --git a/src/big/yaml.cr b/src/big/yaml.cr
@@ -16,3 +16,11 @@ def BigFloat.new(ctx : YAML::ParseContext, node : YAML::Nodes::Node)
 
   BigFloat.new(node.value)
 end
+
+def BigDecimal.new(ctx : YAML::ParseContext, node : YAML::Nodes::Node)
+  unless node.is_a?(YAML::Nodes::Scalar)
+    node.raise "Expected scalar, not #{node.class}"
+  end
+
+  BigDecimal.new(node.value)
+end