1 files changed, 27 insertions, 0 deletions
diff --git a/boot/tree.c b/boot/tree.c
index 1d88743..7dd6447 100644
--- a/boot/tree.c
+++ b/boot/tree.c
@@ -326,6 +326,15 @@ binary_operation_to_string(enum Binary_Operation operation)
 // nodes are parts of the syntax tree that are reused often
 // and in different places.
 
+// a block of code, enclosed in curly braces.
+// represents a sequence of statements that are executed in order.
+struct Block_Node
+{
+    struct Statement* statements;
+    struct Span span;
+    struct Cursor location;
+};
+
 // a type node represents a type in the syntax tree.
 // currently, we only support types that are simple names.
 struct Type_Node
@@ -538,6 +547,8 @@ enum Statement_Kind
     STATEMENT_NONE,
     STATEMENT_EXPRESSION,
     STATEMENT_DECLARATION,
+    // NOTE: a block could be an expression in the future.
+    STATEMENT_BLOCK,
 };
 
 struct Statement_Value_Expression
@@ -554,10 +565,16 @@ struct Statement_Value_Declaration
     struct Type_Node type; // the type of the variable, if any.
 };
 
+struct Statement_Value_Block
+{
+    struct Block_Node inner; // the block of statements.
+};
+
 union Statement_Value
 {
     struct Statement_Value_Expression expression;
     struct Statement_Value_Declaration declaration;
+    struct Statement_Value_Block block;
 };
 
 struct Statement
@@ -621,6 +638,16 @@ statement_print(const struct Statement* statement)
         printf(")");
         break;
     }
+    case STATEMENT_BLOCK:
+        printf("(block \n");
+        FOR_EACH(struct Statement*, sub_statement, statement->value.block.inner.statements)
+        {
+            printf("\t");
+            statement_print(sub_statement);
+            printf("\n");
+        }
+        printf(")");
+        break;
     default:
         failure("unexpected statement kind passed to `statement_print`");
         break;