SOURCE_FILE
FN
FN_KW "fn"
WHITESPACE " "
NAME
IDENT "f"
PARAM_LIST
L_PAREN "("
R_PAREN ")"
WHITESPACE " "
BLOCK_EXPR
STMT_LIST
L_CURLY "{"
WHITESPACE " "
LET_STMT
LET_KW "let"
WHITESPACE " "
IDENT_PAT
NAME
IDENT "x"
COLON ":"
WHITESPACE " "
PATH_TYPE
PATH
PATH_SEGMENT
NAME_REF
IDENT "i32"
SEMICOLON ";"
WHITESPACE " "
R_CURLY "}"
WHITESPACE "\n"