Cargo Features
[dependencies]
syn = { version = "2.0.39", default-features = false, features = ["full", "derive", "parsing", "printing", "fold", "clone-impls", "extra-traits", "proc-macro", "test"] }
- default = clone-impls, derive, parsing, printing, proc-macro
-
These default features are set whenever
syn
is added without
somewhere in the dependency tree.default-features = false - full
-
Affects
fold::Fold.fold_arm
,fold::Fold.fold_block
,fold::Fold.fold_expr_array
,fold::Fold.fold_expr_assign
,fold::Fold.fold_expr_async
,fold::Fold.fold_expr_await
,fold::Fold.fold_expr_block
,fold::Fold.fold_expr_break
,fold::Fold.fold_expr_closure
,fold::Fold.fold_expr_const
,fold::Fold.fold_expr_continue
,fold::Fold.fold_expr_for_loop
,fold::Fold.fold_expr_if
,fold::Fold.fold_expr_let
,fold::Fold.fold_expr_loop
,visit::Visit.visit_arm
,visit::Visit.visit_block
,visit::Visit.visit_expr_array
,visit::Visit.visit_expr_assign
,visit::Visit.visit_expr_async
… - derive default
-
Affects
fold::Fold.fold_data
,fold::Fold.fold_data_enum
,fold::Fold.fold_data_struct
,fold::Fold.fold_data_union
,fold::Fold.fold_derive_input
,fold::fold_data
,fold::fold_data_enum
,fold::fold_data_struct
,fold::fold_data_union
,fold::fold_derive_input
,visit::Visit.visit_data
,visit::Visit.visit_data_enum
,visit::Visit.visit_data_struct
,visit::Visit.visit_data_union
,visit::Visit.visit_derive_input
,visit::visit_data
,visit::visit_data_enum
,visit::visit_data_struct
,visit::visit_data_union
,visit::visit_derive_input
… - parsing default
-
Affects
syn::buffer
,syn::ext
,syn::parse
,syn::parse2
,syn::parse_str
,token::Token
,syn::spanned
,syn::parse
,syn::parse_file
,syn::meta
… - printing default = quote
-
Affects
generics::ImplGenerics
,generics::TypeGenerics
,generics::Turbofish
,syn::spanned
… - visit visit-mut fold
- clone-impls default
- extra-traits
- proc-macro default
-
Enables proc-macro of proc-macro2 and quote
Affects
export::TokenStream
,parse::Parser.parse
,syn::parse
… - test
-
Enables all-features of syn-test-suite
Features from optional dependencies
In crates that don't use the dep:
syntax, optional dependencies automatically become Cargo features.