feat(furc): add compound statement

This one: { [statement]... }

furc/include/furc/ast/declaration.hpp

@@ -11,7 +11,6 @@ namespace ast {
 enum class declaration_node_t {
     FunctionDeclaration,
     FunctionDefinition,
-    Variable,
 };
 
 class declaration_node : public statement_node {
@@ -64,4 +63,4 @@ private:
 } // namespace ast
 } // namespace furc
 
-#endif // FURC_AST_DECLARATION_HPP
+#endif // FURC_AST_DECLARATION_HPP

furc/include/furc/ast/fwd.hpp

@@ -63,6 +63,8 @@ class return_statement_node;
 using return_statement_node_h = node_handle<return_statement_node>;
 class if_statement_node;
 using if_statement_node_h = node_handle<if_statement_node>;
+class compound_statement_node;
+using compound_statement_node_h = node_handle<compound_statement_node>;
 
 } // namespace ast
 } // namespace furc

furc/include/furc/ast/statement.hpp

@@ -11,6 +11,7 @@ enum class statement_node_t {
     Declaration,
     Return,
     If,
+    Compound,
 };
 
 class statement_node : public node {
@@ -67,6 +68,24 @@ private:
     statement_node_h  m_else;
 };
 
+class compound_statement_node : public statement_node {
+public:
+    compound_statement_node(body_h&& body)
+      : m_body(std::move(body)) {}
+public:
+    const body_h& body() const { return m_body; }
+public:
+    statement_node_t statement_type() const override { return statement_node_t::Compound; }
+public:
+    void accept(visitor& visitor) const override;
+
+    std::ostream& print(std::ostream& os) const override;
+protected:
+    bool equal(const node& rhs) const override;
+private:
+    body_h m_body;
+};
+
 } // namespace ast
 } // namespace furc
 

furc/include/furc/ast/visitor.hpp

@@ -26,6 +26,7 @@ public:
     virtual void visit_function_definition_node(const function_definition_node&) {}
     virtual void visit_return_statement_node(const return_statement_node&) {}
     virtual void visit_if_statement_node(const if_statement_node&) {}
+    virtual void visit_compound_statement_node(const compound_statement_node&) {}
 
     virtual void visit_error(const node_handle<node>& handle) {}
 };

furc/include/furc/front/ir_generator.hpp

@@ -23,6 +23,7 @@ public:
     void visit_function_definition_node(const ast::function_definition_node& funcDef) override;
     void visit_return_statement_node(const ast::return_statement_node& returnStmt) override;
     void visit_if_statement_node(const ast::if_statement_node& node) override;
+    void visit_compound_statement_node(const ast::compound_statement_node& node) override;
     void visit_string_literal_node(const ast::string_literal_node& node) override;
     void visit_integer_literal_node(const ast::integer_literal_node& node) override;
     void visit_var_read_expression_node(const ast::var_read_expression_node& node) override;