=====================================
Pragma Directive
=====================================
pragma circom 2.0.0;
---
(source_file
      (pragma_directive
        (circom_pragma_token
          (circom_version))))
=====================================
Pragma Directive Custom
=====================================
pragma circom 2.0.0;
pragma custom_templates;
---
(source_file
      (pragma_directive
        (circom_pragma_token
          (circom_version)))
      (pragma_directive
        (circom_custom_templates_token)))