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diff --git a/tiger-compiler/src/ast/function-dec.cc b/tiger-compiler/src/ast/function-dec.cc
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+++ b/tiger-compiler/src/ast/function-dec.cc
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+/**
+ ** \file ast/function-dec.cc
+ ** \brief Implementation of ast::FunctionDec.
+ */
+
+#include <ast/function-dec.hh>
+#include <ast/visitor.hh>
+
+namespace ast
+{
+  FunctionDec::FunctionDec(const Location& location,
+                           misc::symbol name,
+                           VarChunk* formals,
+                           NameTy* result,
+                           Exp* body)
+    : Dec(location, name)
+    , TypeConstructor()
+    , formals_(formals)
+    , result_(result)
+    , body_(body)
+  {}
+
+  FunctionDec::~FunctionDec()
+  {
+    delete formals_;
+    delete result_;
+    delete body_;
+  }
+
+  void FunctionDec::accept(ConstVisitor& v) const { v(*this); }
+
+  void FunctionDec::accept(Visitor& v) { v(*this); }
+} // namespace ast