DocAda Light by KSCE - F.3.1 Picture String Formation

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F.3.1 Picture String Formation

A well-formed picture String, or simply picture String, is a String value that conforms to the syntactic rules, composition constraints, and character replication conventions specified in this clause.

Dynamic Semantics

(blank)

   
       picture_string ::=
          fixed_$_picture_string
        | fixed_#_picture_string
        | floating_currency_picture_string
        | non_currency_picture_string

       fixed_$_picture_string ::=
          [fixed_LHS_sign] fixed_$_char {direct_insertion} [zero_suppression]
            number [RHS_sign]

        | [fixed_LHS_sign {direct_insertion}] [zero_suppression]
            number fixed_$_char {direct_insertion} [RHS_sign]

        | floating_LHS_sign number fixed_$_char {direct_insertion} [RHS_sign]

        | [fixed_LHS_sign] fixed_$_char {direct_insertion}
            all_zero_suppression_number {direct_insertion}  [RHS_sign]

        | [fixed_LHS_sign {direct_insertion}] all_zero_suppression_number {direct_insertion}
            fixed_$_char {direct_insertion} [RHS_sign]

        | all_sign_number {direct_insertion} fixed_$_char {direct_insertion} [RHS_sign]

       fixed_#_picture_string ::=
          [fixed_LHS_sign] single_#_currency {direct_insertion}
            [zero_suppression] number [RHS_sign]

        | [fixed_LHS_sign] multiple_#_currency {direct_insertion}
            zero_suppression number [RHS_sign]

        | [fixed_LHS_sign {direct_insertion}] [zero_suppression]
            number fixed_#_currency {direct_insertion} [RHS_sign]

        | floating_LHS_sign number fixed_#_currency {direct_insertion} [RHS_sign]

        | [fixed_LHS_sign] single_#_currency {direct_insertion}
            all_zero_suppression_number {direct_insertion} [RHS_sign]

        | [fixed_LHS_sign] multiple_#_currency {direct_insertion}
            all_zero_suppression_number {direct_insertion} [RHS_sign]

        | [fixed_LHS_sign {direct_insertion}] all_zero_suppression_number {direct_insertion}
            fixed_#_currency {direct_insertion} [RHS_sign]

        | all_sign_number {direct_insertion} fixed_#_currency {direct_insertion} [RHS_sign]

       floating_currency_picture_string ::=
          [fixed_LHS_sign] {direct_insertion} floating_$_currency number [RHS_sign]
        | [fixed_LHS_sign] {direct_insertion} floating_#_currency number [RHS_sign]
        | [fixed_LHS_sign] {direct_insertion} all_currency_number {direct_insertion} [RHS_sign]

       non_currency_picture_string ::=
          [fixed_LHS_sign {direct_insertion}] zero_suppression number [RHS_sign]
        | [floating_LHS_sign] number [RHS_sign]
        | [fixed_LHS_sign {direct_insertion}] all_zero_suppression_number {direct_insertion} [RHS_sign]
        | all_sign_number {direct_insertion}
        | fixed_LHS_sign direct_insertion {direct_insertion} number [RHS_sign]

       fixed_LHS_sign ::=  LHS_Sign

       LHS_Sign ::=  + | - | <


       fixed_$_char ::= $


       direct_insertion ::=  simple_insertion

       simple_insertion ::=  _ | B | 0 | /


       zero_suppression ::=  Z {Z | context_sensitive_insertion} | fill_string

       context_sensitive_insertion ::=  simple_insertion


       fill_string ::=  * {* | context_sensitive_insertion}


       number ::=
          fore_digits [radix [aft_digits] {direct_insertion}]
        | radix aft_digits {direct_insertion}

       fore_digits ::= 9 {9 | direct_insertion}

       aft_digits ::=  {9 | direct_insertion} 9

       radix ::= . | V


       RHS_sign ::= + | - | > | CR | DB


       floating_LHS_sign ::=
          LHS_Sign {context_sensitive_insertion} LHS_Sign {LHS_Sign | context_sensitive_insertion}


       single_#_currency ::= #

       multiple_#_currency ::= ## {#}


       fixed_#_currency ::= single_#_currency | multiple_#_currency


       floating_$_currency ::=
          $ {context_sensitive_insertion} $ {$ | context_sensitive_insertion}


       floating_#_currency ::=
          # {context_sensitive_insertion} # {# | context_sensitive_insertion}


       all_sign_number ::=  all_sign_fore [radix [all_sign_aft]] [>]

       all_sign_fore ::=
          sign_char {context_sensitive_insertion} sign_char {sign_char | context_sensitive_insertion}

       all_sign_aft ::= {all_sign_aft_char} sign_char

       all_sign_aft_char ::=  sign_char | context_sensitive_insertion

       sign_char ::= + | - | <


       all_currency_number ::=  all_currency_fore [radix [all_currency_aft]]

       all_currency_fore ::=
          currency_char {context_sensitive_insertion}
            currency_char {currency_char | context_sensitive_insertion}

       all_currency_aft ::= {all_currency_aft_char} currency_char

       all_currency_aft_char ::= currency_char | context_sensitive_insertion

       currency_char ::= $ | #


       all_zero_suppression_number ::=  all_zero_suppression_fore [ radix [all_zero_suppression_aft]]

       all_zero_suppression_fore ::=
          zero_suppression_char {zero_suppression_char | context_sensitive_insertion}

       all_zero_suppression_aft ::= {all_zero_suppression_aft_char} zero_suppression_char

       all_zero_suppression_aft_char ::=  zero_suppression_char | context_sensitive_insertion

       zero_suppression_char ::= Z | *

The following composition constraints apply to a picture String:

A floating_LHS_sign does not have occurrences of different LHS_Sign Character values.

If a picture String has '<' as fixed_LHS_sign, then it has '>' as RHS_sign.

If a picture String has '<' in a floating_LHS_sign or in an all_sign_number, then it has an occurrence of '>'.

If a picture String has '+' or '-' as fixed_LHS_sign, in a floating_LHS_sign, or in an all_sign_number, then it has no RHS_sign.

An instance of all_sign_number does not have occurrences of different sign_char Character values.

An instance of all_currency_number does not have occurrences of different currency_char Character values.

An instance of all_zero_suppression_number does not have occurrences of different zero_suppression_char Character values, except for possible case differences between 'Z' and 'z'.

A replicable Character is a Character that, by the above rules, can occur in two consecutive positions in a picture String.

A Character replication is a String

    
       char & '(' & spaces & count_string & ')'

where char is a replicable Character, spaces is a String (possibly empty) comprising only space Character values, and count_string is a String of one or more decimal digit Character values. A Character replication in a picture String has the same effect as (and is said to be equivalent to) a String comprising n consecutive occurrences of char, where n=Integer'Value(count_string).

An expanded picture String is a picture String containing no Character replications.

NOTES

(3) Although a sign to the left of the number can float, a sign to the right of the number is in a fixed position.

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