isempty ( ';' STRING )*

Summary

The isempty macro checks if all provided arguments are empty strings. Returns true only if all values are empty, false otherwise.

Syntax

${isempty[;<string>...]}

Parameters

• string (optional) - Zero or more strings to check

Behavior

• Returns true if all arguments are empty strings
• Returns true if no arguments provided
• Returns false if any argument has content
• Empty string means zero length

Examples

Check if empty:

${if;${isempty;${value}};value-empty;value-has-content}

Check multiple values:

${isempty;;;;}
# Returns: true (all empty)

Validate required fields:

${if;${isempty;${name};${email}};missing-fields;fields-ok}

No arguments:

${isempty}
# Returns: true

Use Cases

• Input validation
• Checking for missing values
• Required field validation
• Conditional logic on emptiness
• Form validation

Notes

• All arguments must be empty for true
• Empty string is “”
• Whitespace is not empty
• Returns boolean
• See also: ${length} to check string size
• See also: ${def} for default values

See test cases in MacroTestsForDocsExamples.java