feat: add if/else blocks

if now guards a { } block or bare statement with an optional else (and
now else-if chaining). The branch body becomes a statement list; a bare
guarded statement is a list of length one.

1 files changed, 4 insertions, 0 deletions

diff --git a/src/parser/ast.h b/src/parser/ast.h
index c439747..75d0bdd 100644
--- a/src/parser/ast.h
+++ b/src/parser/ast.h
@@ -135,6 +135,9 @@ struct IfStatement
 	struct Token comparison;
 	struct Expr* right;
 	struct Statement* body;
+	size_t body_count;
+	struct Statement* else_body;
+	size_t else_count;
 };
 
 struct CallStatement
@@ -230,3 +233,4 @@ void add_statement(struct ProcDecl* proc, struct Statement statement);
 void add_proc(struct Program* program, struct ProcDecl decl);
 
 void free_expr(struct Expr* expr);
+void free_statement(struct Statement* statement);