feat(furc): add compound statement

This one: { [statement]... }

furc/src/ast.cpp

@@ -204,6 +204,18 @@ bool if_statement_node::equal(const node& rhsNode) const {
     return statement_node::equal(rhs) && m_cond == rhs.m_cond && m_then == rhs.m_then && m_else == rhs.m_else;
 }
 
+void compound_statement_node::accept(visitor& visitor) const {
+    visitor.visit_compound_statement_node(*this);
+}
+
+std::ostream& compound_statement_node::print(std::ostream& os) const {
+    return os << m_body;
+}
+
+bool compound_statement_node::equal(const node& rhs) const {
+    return statement_node::equal(rhs) && m_body == reinterpret_cast<const compound_statement_node&>(rhs).m_body;
+}
+
 void program_node::accept(visitor& visitor) const {
     for (const auto& decl : m_declarations) {
         if (decl.has_error()) {

furc/src/front/ir_generator.cpp

@@ -60,6 +60,12 @@ void ir_generator::visit_if_statement_node(const ast::if_statement_node& node) {
     push_block();
 }
 
+void ir_generator::visit_compound_statement_node(const ast::compound_statement_node& node) {
+    for (const auto& stmt : node.body()->statements) {
+        stmt->accept(*this);
+    }
+}
+
 void ir_generator::visit_string_literal_node(const ast::string_literal_node& node) {
     m_currentBlock->emplace<furlang::ir::assign_instruction>(ir::operand::new_string(std::string(*node.value())),
         ir::operand::new_reg(m_registerCounter++));

furc/src/front/parser.cpp

@@ -89,6 +89,7 @@ ast::declaration_node_h parser::parse_declaration() {
 ast::statement_node_h parser::parse_statement() {
     const auto& tok = peek_token();
     if (tok.has_error()) return tok;
+    auto location = tok.location();
     switch (tok->type) {
     case token_t::Keyword: {
         switch (tok->value.keyword) {
@@ -121,20 +122,21 @@ ast::statement_node_h parser::parse_statement() {
                 peek_token()->value.keyword == keyword_token::Else) {
                 next_token();
 
-                return ast::if_statement_node_h{ tok.location(),
+                return ast::if_statement_node_h{ location,
                     m_arena,
                     std::move(cond),
                     std::move(then),
                     std::move(parse_statement()) };
             }
 
-            return ast::if_statement_node_h{ tok.location(), m_arena, std::move(cond), std::move(then) };
+            return ast::if_statement_node_h{ location, m_arena, std::move(cond), std::move(then) };
         }
         case keyword_token::None:
         case keyword_token::Func:
         default: break;
         }
     }
+    case token_t::Lbrace: return ast::compound_statement_node_h{ location, m_arena, parse_body() };
     default: break;
     }
 

furc/src/main.cpp

@@ -6,7 +6,21 @@
 #include <iostream>
 
 int main(void) {
-    furc::front::parser       parser("<TEMP>", "func main() {\n    if (1) return 7 + 6 * 10; else return 0;\n}");
+    std::string               programStr = R"(
+    func main() {
+        x = 5;
+        x -= 3;
+        if (x < 3) {
+            y = x * 2;
+            w = y;
+        } else {
+            y = x - 3;
+        }
+        w = x - y;
+        z = x + y;
+    }
+    )";
+    furc::front::parser       parser("<TEMP>", programStr);
     furc::front::ir_generator generator;
 
     auto program = parser.parse();
@@ -31,4 +45,4 @@ int main(void) {
     return 0;
 }
 
-#endif // LIBFURC
+#endif // LIBFURC