Module util

Internal utilities for parser.

Re-exports

• pub use duration::display_duration;
• pub use duration::parse_duration;
• pub use number::parse_str_radix;

Modules

• duration
• number

Traits

• ExprVisitor
  Trait that implements the Visitor pattern for a depth first walk on Expr AST. pre_visit is called before any children are visited, and then post_visit is called after all children have been visited. Only pre_visit is required.

Functions

• walk_expr
  A util function that traverses an AST Expr in depth-first order. Returns Ok(true) if all nodes were visited, and Ok(false) if any call to pre_visit or post_visit returned Ok(false) and may have cut short the recursion.