Macros: evaluate yield expressions (#6587)

crystal-lang · Aug 22, 2018 · 5e059ab · 5e059ab
1 parent ea543f3
commit 5e059ab
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Showing 2 changed files with 13 additions and 1 deletion.
diff --git a/spec/compiler/semantic/macro_spec.cr b/spec/compiler/semantic/macro_spec.cr
@@ -1321,4 +1321,16 @@ describe "Semantic: macro" do
       {% end %}
       )) { int32 }
   end
+
+  it "evaluates yield expression (#2924)" do
+    assert_type(%(
+      macro a(b)
+        {{yield b}}
+      end
+
+      a("foo") do |c|
+        {{c}}
+      end
+      )) { string }
+  end
 end
diff --git a/src/compiler/crystal/macros/interpreter.cr b/src/compiler/crystal/macros/interpreter.cr
@@ -388,7 +388,7 @@ module Crystal
           block_vars = {} of String => ASTNode
           node.exps.each_with_index do |exp, i|
             if block_arg = block.args[i]?
-              block_vars[block_arg.name] = exp.clone
+              block_vars[block_arg.name] = accept exp.clone
             end
           end
           @last = replace_block_vars block.body.clone, block_vars