Struct MacroExpansionTraceExt 

pub struct MacroExpansionTraceExt {
    pub steps: Vec<String>,
}

A macro expansion trace for debugging.

Fields

steps: Vec<String>

Steps in the trace

Implementations

impl MacroExpansionTraceExt

pub fn new() -> Self

Create a new empty trace.

pub fn record(&mut self, step: &str)

Record an expansion step.

pub fn format(&self) -> String

Format the trace as a string.

Trait Implementations

impl Debug for MacroExpansionTraceExt

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for MacroExpansionTraceExt

fn default() -> MacroExpansionTraceExt

Returns the “default value” for a type.