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A166 User's Guide
A166 Introduction Assembling Programs Operands and Expressions Operators Control Statements 
Macro Processor Standard Macro Processor 
Standard Macro Controls Defining Standard Macros Calling Standard Macros Local Symbols Exiting A Macro Built-in Macros REPT IRP IRPC Standard Macro Operators NUL Operator & Operator < and > Operators % Operator ;; Operator ! Operator MPL Macro Processor MPL Macro Overview MPL Meta Character Defining MPL Macros Calling MPL Macros Local Symbols Expressions Common Functions Bracket Function Comment Function Escape Function METACHAR Function SET Function EVAL Function Comparison Functions Conditional Functions EXIT Function IF Function REPEAT Function WHILE Function Console I/O Functions String Functions LEN Function MATCH Function SUBSTR Function Advanced Literal Delimiters Blank Delimiters Identifier Delimiters Literal and Normal Modes Errors Error Messages AppendixBracket Function
The Bracket MPL function prevents macro processing of specified text. The syntax for the bracket function is:
%(balanced-text)
The bracket function disables all macro processing of the balanced-text contained within the parentheses. However, the Escape function, Comment function, and parameter substitution are still recognized.
The length of the balanced-text is not limited. Therefore, the bracket function may prove easier to use than the escape function. For example:
ASM%(166) Evaluates to ASM166 %(1,2,3,4,5) Evaluates to 1,2,3,4,5
Source Text
%*DEFINE (DW (LIST, LABEL)) ( %LABEL: DW %LIST ) %DW (%(120, 121, 122, 123, -1), TABLE)
Output Text
TABLE: DW 120, 121, 122, 123, -1
Note
- The DW macro defined in the above example adds word definitions to the source file. It uses two parameters: one for the word expression list and one for the label name. Without the bracket function, it is impossible to pass more than one expression into the list since the first comma would be interpreted as the delimiter separating the actual parameters. The bracket function used in the macro call prevents the expression list (120, 121, 122, 123, -1) from being evaluated as separate parameters.
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