#line 2074 "/home/travis/build/felix-lang/felix/src/packages/grammar.fdoc"

SCHEME """
(define (findradix s)  ; find the radix of integer lexeme
  (let*
    (
      (n (string-length s))
      (result
        (cond
          ((prefix? "0b" s)`(,(substring s 2 n) 2))
          ((prefix? "0o" s)`(,(substring s 2 n) 8))
          ((prefix? "0d" s)`(,(substring s 2 n) 10))
          ((prefix? "0x" s)`(,(substring s 2 n) 16))
          (else `(,s 10))
        )
      )
    )
    result
  )
)
""";

SCHEME """
(define (findtype s) ;; find type of integer lexeme
  (let*
    (
      (n (string-length s))
      (result
        (cond
          ((suffix? "ut" s)`(,(substring s 0 (- n 2)) "utiny"))
          ((suffix? "tu" s)`(,(substring s 0 (- n 2)) "utiny"))
          ((suffix? "t" s)`(,(substring s 0 (- n 1)) "tiny"))

          ((suffix? "us" s)`(,(substring s 0 (- n 2)) "ushort"))
          ((suffix? "su" s)`(,(substring s 0 (- n 2)) "ushort"))
          ((suffix? "s" s)`(,(substring s 0 (- n 1)) "short"))

          ((suffix? "ui" s)`(,(substring s 0 (- n 2)) "uint"))
          ((suffix? "iu" s)`(,(substring s 0 (- n 2)) "uint"))
          ((suffix? "i" s)`(,(substring s 0 (- n 1)) "int"))

          ((suffix? "uz" s)`(,(substring s 0 (- n 2)) "size"))
          ((suffix? "zu" s)`(,(substring s 0 (- n 2)) "size"))
          ((suffix? "z" s)`(,(substring s 0 (- n 1)) "ssize"))

          ((suffix? "uj" s)`(,(substring s 0 (- n 2)) "uintmax"))
          ((suffix? "ju" s)`(,(substring s 0 (- n 2)) "uintmax"))
          ((suffix? "j" s)`(,(substring s 0 (- n 1)) "intmax"))

          ((suffix? "up" s)`(,(substring s 0 (- n 2)) "uintptr"))
          ((suffix? "pu" s)`(,(substring s 0 (- n 2)) "uintptr"))
          ((suffix? "p" s)`(,(substring s 0 (- n 1)) "intptr"))

          ((suffix? "ud" s)`(,(substring s 0 (- n 2)) "uptrdiff"))
          ((suffix? "du" s)`(,(substring s 0 (- n 2)) "uptrdiff"))
          ((suffix? "d" s)`(,(substring s 0 (- n 1)) "ptrdiff"))

          ;; must come first!
          ((suffix? "uvl" s)`(,(substring s 0 (- n 3)) "uvlong"))
          ((suffix? "vlu" s)`(,(substring s 0 (- n 3)) "uvlong"))
          ((suffix? "ulv" s)`(,(substring s 0 (- n 3)) "uvlong"))
          ((suffix? "lvu" s)`(,(substring s 0 (- n 3)) "uvlong"))
          ((suffix? "llu" s)`(,(substring s 0 (- n 3)) "uvlong"))
          ((suffix? "ull" s)`(,(substring s 0 (- n 3)) "uvlong"))

          ((suffix? "uv" s)`(,(substring s 0 (- n 2)) "uvlong"))
          ((suffix? "vu" s)`(,(substring s 0 (- n 2)) "uvlong"))

          ((suffix? "lv" s)`(,(substring s 0 (- n 2)) "vlong"))
          ((suffix? "vl" s)`(,(substring s 0 (- n 2)) "vlong"))
          ((suffix? "ll" s)`(,(substring s 0 (- n 2)) "vlong"))

          ;; comes next
          ((suffix? "ul" s)`(,(substring s 0 (- n 2)) "ulong"))
          ((suffix? "lu" s)`(,(substring s 0 (- n 2)) "ulong"))

          ;; last
          ((suffix? "v" s)`(,(substring s 0 (- n 1)) "vlong"))
          ((suffix? "u" s)`(,(substring s 0 (- n 1)) "uint"))
          ((suffix? "l" s)`(,(substring s 0 (- n 1)) "long"))

          ;; exact
          ((suffix? "u8" s)`(,(substring s 0 (- n 2)) "uint8"))
          ((suffix? "u16" s)`(,(substring s 0 (- n 3)) "uint16"))
          ((suffix? "u32" s)`(,(substring s 0 (- n 3)) "uint32"))
          ((suffix? "u64" s)`(,(substring s 0 (- n 3)) "uint64"))
          ((suffix? "i8" s)`(,(substring s 0 (- n 2)) "int8"))
          ((suffix? "i16" s)`(,(substring s 0 (- n 3)) "int16"))
          ((suffix? "i32" s)`(,(substring s 0 (- n 3)) "int32"))
          ((suffix? "i64" s)`(,(substring s 0 (- n 3)) "int64"))
          (else `(,s "int"))
        )
      )
    )
    result
  )
)
""";

SCHEME """
(define (parse-int s)
  (let*
    (
      (s (tolower-string s))
      (x (findradix s))
      (radix (second x))
      (x (first x))
      (x (findtype x))
      (type (second x))
      (digits (first x))
      (value (string->number digits radix))
    )
    (if (equal? value #f)
       (begin
         (newline)
         (display "Invalid integer literal ") (display s)
         (newline)
         (display "Radix ")(display radix)
         (newline)
         (display "Type ")(display type)
         (newline)
         (display "Digits ")(display digits)
         (newline)
         error
       )
       `(,type ,value)
    )
  )
)
""";

//$ Integer literals.
//$
//$ Felix integer literals consist of an optional radix specifer,
//$ a sequence of digits of the radix type, possibly separated
//$ by an underscore (_) character, and a trailing type specifier.
//$
//$ The radix can be:
//$ 0b, 0B - binary
//$ 0o, 0O - octal
//$ 0d, 0D - decimal
//$ 0x, 0X - hex
//$
//$ The default is decimal.
//$ NOTE: unlike C a leading 0 in does NOT denote octal.
//$
//$ Underscores are allowed between digits or the radix
//$ and the first digit, or between the digits and type specifier.
//$
//$ The adaptable signed type specifiers are:
//$
//$ t        -- tiny   (char as int)
//$ s        -- short
//$ i        -- int
//$ l        -- long
//$ v,ll     -- vlong (long long in C)
//$ z        -- ssize (ssize_t in C, a signed variant of size_t)
//$ j        -- intmax
//$ p        -- intptr
//$ d        -- ptrdiff
//$
//$ These may be upper of lower case.
//$ A "u" or "U" before or after such specifier indicates
//$ the correspondin unsigned type.
//$
//$ The follingw exact type specifiers can be given:
//$
//$      "i8" | "i16" | "i32" | "i64"
//$    | "u8" | "u16" | "u32" | "u64"
//$    | "I8" | "I16" | "I32" | "I64"
//$    | "U8" | "U16" | "U32" | "U64";
//$
//$ The default type is "int".
//$

syntax felix_int_lexer {
  /* integers */
  regdef bin_lit  = '0' ('b' | 'B') (underscore? bindigit) +;
  regdef oct_lit  = '0' ('o' | 'O') (underscore? octdigit) +;
  regdef dec_lit  = '0' ('d' | 'D') (underscore? digit) +;
  regdef dflt_dec_lit  =  digit (underscore? digit) *;
  regdef hex_lit  = '0' ('x' | 'X') (underscore? hexdigit)  +;
  regdef int_prefix = bin_lit | oct_lit | dec_lit | dflt_dec_lit | hex_lit;

  regdef fastint_type_suffix =
    't'|'T'|'s'|'S'|'i'|'I'|'l'|'L'|'v'|'V'|"ll"|"LL"|"z"|"Z"|"j"|"J"|"p"|"P"|"d"|"D";
  regdef exactint_type_suffix =
      "i8" | "i16" | "i32" | "i64"
    | "u8" | "u16" | "u32" | "u64"
    | "I8" | "I16" | "I32" | "I64"
    | "U8" | "U16" | "U32" | "U64";

  regdef signind = 'u' | 'U';

  regdef int_type_suffix =
      '_'? exactint_type_suffix
    | ('_'? fastint_type_suffix)? ('_'? signind)?
    | ('_'? signind)? ('_'? fastint_type_suffix)?;

  regdef int_lit = int_prefix int_type_suffix;

  // Untyped integer literals.
  literal int_prefix =># """
  (let*
    (
      (val (stripus _1))
      (x (parse-int val))
      (type (first x))
      (value (second x))
    )
    value
  )
  """;
  sinteger := int_prefix =># "_1";

  // Typed integer literal.
  literal int_lit =># """
  (let*
    (
      (val (stripus _1))
      (x (parse-int val))
      (type (first x))
      (value (second x))
      (fvalue (number->string value))
      (cvalue fvalue)       ;; FIXME!!
    )
    `(,type ,fvalue ,cvalue)
  )
  """;
  sliteral := int_lit =># "`(ast_literal ,_sr ,@_1)";

  // Typed signed integer constant.
  sintegral := int_lit =># "_1";
  sintegral := "-" int_lit =># """
  (let*
    (
      (type (first _2))
      (val (second _2))
      (val (* -1 val))
    )
    `(,type ,val)
  )
  """;

  strint := sintegral =># "(second _1)";
}