SOURCE_FILE
FN
FN_KW "fn"
WHITESPACE " "
NAME
IDENT "foo"
PARAM_LIST
L_PAREN "("
R_PAREN ")"
WHITESPACE " "
BLOCK_EXPR
STMT_LIST
L_CURLY "{"
WHITESPACE " "
LET_STMT
LET_KW "let"
WHITESPACE " "
WILDCARD_PAT
UNDERSCORE "_"
WHITESPACE " "
EQ "="
WHITESPACE " "
BLOCK_EXPR
ASYNC_KW "async"
WHITESPACE " "
STMT_LIST
L_CURLY "{"
R_CURLY "}"
WHITESPACE " "
R_CURLY "}"
WHITESPACE "\n"
error 27: expected SEMICOLON