syntax: syntax tree is trashed once no more needed

[nit.git] / src / syntax / syntax.nit

diff --git a/src/syntax/syntax.nit b/src/syntax/syntax.nit
index 68a1ebb..8a8f18e 100644 (file)
--- a/src/syntax/syntax.nit
+++ b/src/syntax/syntax.nit
@@ -76,6 +76,13 @@ redef class MMSrcModule
 
                generate_icode(tc)
                tc.check_errors
+
+               if not tc.keep_ast then clear_ast
        end
 end
 
+redef class ToolContext
+       # Should the AST be preserved in source modules after syntax processing?
+       # Default is false.
+       readable writable var _keep_ast: Bool = false
+end