namespaces: Add a namespace structure that represents a file

We have been always parsing a single function. Since we want to have
multiple functions in a near future, this patch introduces an namespace
that represents an entire file.

To ensure a function is defined inside a namespace, a helper function
was created. Today our ast_node structure is highly exposed, and this is
something that Johnny and I have been discussed. So then, this is a
first step to try to protected the code generation from our ast tree.

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

1 files changed, 16 insertions, 0 deletions

diff --git a/src/ast.h b/src/ast.h
index b2c565c..7d2d2f1 100644
--- a/src/ast.h
+++ b/src/ast.h
@@ -29,6 +29,11 @@ typedef enum
 
 typedef struct ast_node_t ast_node_t;
 
+typedef struct ast_namespace_t
+{
+  vector_t *nodes;
+} ast_namespace_t;
+
 typedef struct ast_block_t
 {
   vector_t *body;
@@ -119,6 +124,7 @@ typedef struct ast_if_stmt_t
 
 typedef enum
 {
+  AST_NAMESPACE,
   AST_BINARY_OPERATION,
   AST_BLOCK,
   AST_FUNCTION_DECLARATION,
@@ -133,6 +139,7 @@ typedef enum
 
 typedef union
 {
+  ast_namespace_t ns;
   ast_binary_operation_t binary_operation;
   ast_function_declaration_t function;
   ast_literal_t literal;
@@ -164,6 +171,9 @@ void
 ast_node_destroy(ast_node_t *node);
 
 ast_node_t *
+ast_node_new_namespace(vector_t *nodes);
+
+ast_node_t *
 ast_node_new_binary_operation(ast_binary_operation_kind_t kind,
                               ast_node_t *left,
                               ast_node_t *right,
@@ -196,4 +206,10 @@ ast_node_new_variable_assignment(ast_identifier_t *identifier, ast_node_t *expre
 ast_node_t *
 ast_node_new_if_stmt(ast_node_t *condition, ast_node_t *body);
 
+ast_node_t *
+ast_node_ns_get_function_node_by_sv(ast_node_t *ns, string_view_t name);
+
+ast_node_t *
+ast_node_ns_get_function_node_by_name(ast_node_t *ns, char *function_name);
+
 #endif /* AST_H */