Disable AST dumping by default

This feature is still available through defining environment variable.

1 files changed, 3 insertions, 1 deletions

diff --git a/src/main.c b/src/main.c
index 69acdd4..01ea19e 100644
--- a/src/main.c
+++ b/src/main.c
@@ -63,7 +63,9 @@ int main (int argc, char **argv)
     ccmmc_parser_lex_destroy(scanner);
 
     // Dump the AST
-    ccmmc_draw_ast(stdout, source_name, state->ast);
+    const char *dump_ast = getenv("CCMMC_DUMP_AST");
+    if (dump_ast != NULL && *dump_ast != '\0')
+        ccmmc_draw_ast(stdout, source_name, state->ast);
 
     ccmmc_state_fini(state);
     fclose(source_handle);