Substitution in String Values

Rules for String Substitution

The following rules apply:

• Use two percent signs (%%) followed by an expression inside parentheses to replace the expression with its result.
• Use two percent signs (%%) immediately followed by the name of a field, variable, or function to replace it with the current value of that field, variable, or function.
• Use parentheses around the name of a field, variable, or function name in a string, to prevent ambiguity in interpreting it:

  message "%%($$GLOBVAR)XYZ"

  Note: In older versions of Uniface, ambiguity was avoided by following the name with three percent signs (%%%).

  message "%%$$GLOBVAR%%%XYZ"

• Use two percent signs followed by a double quotation mark (%%") to include a double quotation mark in the resulting string.
• Use two percent signs followed by a caret (%%^) to include a carriage return in the resulting string.
• Use two percent signs followed by a left or right angle bracket (%%< or %%>) to include the angle bracket in the resulting string. Use this to prevent the ProcScript Precompiler from interpreting the angle brackets for precompiler constants.
• A single percent sign simply appears as a single percent sign.
• To insert several consecutive percent signs, use string substitution, like in this example:

  Use %%("%")%%("%") to get two percent signs in your message.