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SOURCE_FILE MACRO_DEF MACRO_KW "macro" WHITESPACE " " NAME IDENT "m" WHITESPACE " " TOKEN_TREE L_CURLY "{" WHITESPACE " " TOKEN_TREE L_PAREN "(" DOLLAR "$" IDENT "i" COLON ":" IDENT "ident" R_PAREN ")" WHITESPACE " " EQ "=" R_ANGLE ">" WHITESPACE " " TOKEN_TREE L_CURLY "{" R_CURLY "}" WHITESPACE " " R_CURLY "}" WHITESPACE "\n"