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log_exp - Short Reference

Reference

Other versions: 7.31 | 7.40 | 7.54

Syntax

... { {operand1 {=|EQ|<>|NE|>|GT|<|LT|>=|GE|<=|LE 
   
            |CO|CN|CA|NA|CS|NS|CP|NP 

                |BYTE-CO|BYTE-CN|BYTE-CA|BYTE-NA|BYTE-CS|BYTE-NS 

                |O|Z|M} operand2 } 

    | {operand  [NOT] BETWEEN operand1 AND operand2} 
    | {operand [NOT] IN seltab} 

    | {operand IS [NOT] INITIAL} 
    | {ref     IS [NOT] BOUND} 

    | {<fs>    IS [NOT] ASSIGNED} 
    | {para    IS [NOT] SUPPLIED} 

    | {para    IS [NOT] REQUESTED} 
    | {contains( ... )|contains_any_of( ... )|contains_any_not_of( ... )} 

    | {matches( ... )} 
    | {line_exists( ... )} } 
  | { [NOT] log_exp [AND|OR|EQUIV log_exp] } ... 

Effect

Logical expression for formulating a condition for operands. A logical expression is a relational expression or multiple joined relational expressions, where ( ) can be used as parentheses. The result is a logical value.

Additions

• =|EQ|<>|NE|>|GT|<|LT|>=|GE|<=|LE
  Comparison expression with relational operators for all data types.
• CO|CN|CA|NA|CS|NS|CP|NP
  Comparison expression with relational operators for character-like data types.
• BYTE-CO|BYTE-CN|BYTE-CA|BYTE-NA|BYTE-CS|BYTE-NS
  Comparison expression with relational operators for byte-like data types.
• O|Z|M
  Comparison expression with relational operators for bit patterns
• [NOT] BETWEEN
  Comparison expression used to check what belongs to an interval.
• operand [NOT] IN seltab
  Comparison expression used to check whether an operand meets the conditions of a selection table seltab.
• IS [NOT] INITIAL
  Predicate expression used to check whether the operand operand is initial.
• IS [NOT] BOUND
  Predicate expression used to check whether a reference variable ref is valid
• IS [NOT] ASSIGNED
  Predicate expression used to check whether a memory area is assigned to a field symbol <fs>.
• IS [NOT] SUPPLIED
  Predicate expression used to check whether a formal parameter para of a procedure is filled or requested.
• IS [NOT] REQUESTED
  Obsolete: Predicate expression used to check whether an output parameter para of a procedure is requested
• contains( ... ), contains_...( ... )
  Predicate function used to scan a string.
• matches
  Predicate function used to match a string with a regular expression.
• line_exists
  Predicate function used to check the existence of a row in an internal table.
• NOT
  Boolean operator used to negate a logical expression.
• AND
  Boolean operator used as an AND join between two logical expressions.
• OR
  Boolean operator used as an OR join between two logical expressions.
• EQUIV
  Boolean operator used as an equivalence join between two logical expressions.