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idents_would_merge

rustc_ast_pretty::pprust::state

Function idents_would_merge 

Source 
fn idents_would_merge(tt1: &TokenTree, tt2: &TokenTree) -> bool
Expand description

Should two consecutive tokens be printed with a space between them?

Note: some old proc macros parse pretty-printed output, so changes here can break old code. For example:

  • #63896: #[allow(unused, must be printed rather than #[allow(unused ,
  • #73345: #[allow(unused)] must be printed rather than # [allow(unused)]

Returns true if both token trees are identifier-like tokens that would merge into a single token if printed without a space between them. E.g. ident + where would merge into identwhere.