| 1 | use proc_macro::TokenStream; |
| 2 | use quote::quote; |
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| 3 | use syn::parse_macro_input; |
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| 4 | |
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| 5 | use crate::construct; |
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| 6 | |
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| 7 | use self::args::Args; |
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| 8 | |
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| 9 | mod args; |
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| 10 | |
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| 11 | pub(crate) fn expand(args: TokenStream) -> TokenStream { |
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| 12 | let args: Args = parse_macro_input!(args as Args); |
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| 13 | codegen(&args) |
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| 14 | } |
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| 15 | |
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| 16 | fn codegen(args: &Args) -> TokenStream { |
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| 17 | let tuple_exprs = args |
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| 18 | .exprs |
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| 19 | .iter() |
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| 20 | .map(|expr| { |
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| 21 | let escaped_expr = construct::escaped_expr_string(expr); |
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| 22 | let format_string = format!(" {escaped_expr} = {{}}" ); |
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| 23 | |
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| 24 | quote!(match #expr { |
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| 25 | tmp => { |
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| 26 | defmt::trace!(#format_string, tmp); |
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| 27 | tmp |
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| 28 | } |
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| 29 | }) |
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| 30 | }) |
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| 31 | .collect::<Vec<_>>(); |
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| 32 | |
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| 33 | if tuple_exprs.is_empty() { |
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| 34 | // for compatibility with `std::dbg!` we also emit a TRACE log in this case |
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| 35 | quote!(defmt::trace!("" )) |
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| 36 | } else { |
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| 37 | quote![ (#(#tuple_exprs),*) ] |
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| 38 | } |
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| 39 | .into() |
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| 40 | } |
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| 41 | |
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