parser: create a block node type

Since the next step to pipa programming language is about having control
flow statements we could benefit ourselves by having a block node to
control scope. Now, functions has a block node, instead of an vector as
body. As you can see through the ast-dump:

  FunctionDecl name='main'
  └─ body:
    └─ Block
      └─ ReturnStmt
        └─ Literal type=i32 value='69'

This same node kind can be used for parsing if, for and while blocks.

I could use ast_block_t as body for functions but instead, I opted to
use an ast_node_t. This brings the flexibility to, in the future, having
another function body kinds, such as arrow functions if we want to:

  fn add(a: i32, b: i32): i32 => a + b;

Signed-off-by: Carlos Maniero <carlos@maniero.me>

1 files changed, 25 insertions, 5 deletions

diff --git a/src/ast_pretty_printer.c b/src/ast_pretty_printer.c
index 95f5993..718d22a 100644
--- a/src/ast_pretty_printer.c
+++ b/src/ast_pretty_printer.c
@@ -99,13 +99,33 @@ ast_pretty_printer_print_ast(ast_pretty_printer_t *printer, ast_node_t *ast)
       ast_pretty_printer_printf(printer, "FunctionDecl name='" SVFMT "'\n", SVARG(&function.identifier.name));
 
       ast_pretty_printer_add_indentation(printer);
-      for (size_t i = 0; i < function.body->size; ++i) {
-        if (i + 1 >= function.body->size) {
-          ast_pretty_printer_set_lst_children(printer);
+      {
+        ast_pretty_printer_set_lst_children(printer);
+        ast_pretty_printer_printf(printer, "body:\n");
+
+        ast_pretty_printer_add_indentation(printer);
+        {
+          ast_pretty_printer_print_ast(printer, ast->data.function.body);
+          ast_pretty_printer_rm_indentation(printer);
+        }
+
+        ast_pretty_printer_rm_indentation(printer);
+      }
+      break;
+    }
+    case AST_BLOCK: {
+      ast_pretty_printer_set_lst_children(printer);
+      ast_pretty_printer_printf(printer, "Block\n");
+      ast_pretty_printer_add_indentation(printer);
+      {
+        for (size_t i = 0; i < ast->data.block.body->size; ++i) {
+          if (i + 1 >= ast->data.block.body->size) {
+            ast_pretty_printer_set_lst_children(printer);
+          }
+          ast_pretty_printer_print_ast(printer, vector_at(ast->data.block.body, i));
         }
-        ast_pretty_printer_print_ast(printer, vector_at(function.body, i));
+        ast_pretty_printer_rm_indentation(printer);
       }
-      ast_pretty_printer_rm_indentation(printer);
       break;
     }
     case AST_LITERAL: {