SOURCE_FILE
FN
CONST_KW "const"
WHITESPACE " "
FN_KW "fn"
WHITESPACE " "
NAME
IDENT "foo"
PARAM_LIST
L_PAREN "("
PARAM
WILDCARD_PAT
UNDERSCORE "_"
COLON ":"
WHITESPACE " "
IMPL_TRAIT_TYPE
IMPL_KW "impl"
WHITESPACE " "
TYPE_BOUND_LIST
TYPE_BOUND
CONST_KW "const"
WHITESPACE " "
PATH_TYPE
PATH
PATH_SEGMENT
NAME_REF
IDENT "Trait"
R_PAREN ")"
WHITESPACE " "
BLOCK_EXPR
STMT_LIST
L_CURLY "{"
R_CURLY "}"
WHITESPACE "\n"