C166/ST10 Cross-Assembler, Linker/Locator, Utilities ... - Tasking

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Macro Preprocessor 2−69
Example:
@"−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−
@"Macro for saving registers
@"−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−
@*DEFINE PushReg( RegList )
@MATCH( Reg, List, @RegList )
@WHILE( @LEN( @Reg ) )
PUSH @Reg
@MATCH(Reg, List, @List )
@ENDW
@ENDD
@PushReg ("R0, R1")
The macro PushReg("R0, R1") saves all registers that are contained in
passed register lists. The register list is identified as a parameter string
when called from PushReg("R0, R1") and passed as a parameter to the
macro. With use of the WHILE loop and the MATCH function, all partial
parameters of the returned parameters are processed by the macro.
2.7.7 PARAMETER TYPE STRING
The macro preprocessor provides the internal type ’STRING’ for parameter
strings. This allows the following to be performed:
1. Type test during the processing of this parameter when expanded
by the macro
2. Interpretation of the call and application
3. A precise error test.
Example:
@*DEFINE M1( P1 )
@LEN( @P1 )
@ENDD
A string that is to be passed as a parameter and, in addition, to be
interpreted as a string by the macro expansion when this parameter is
processed should, be specified in the following manner (this is in
accordance with the standard text replacement rules of the macro
preprocessor):
@M1("""Test_String""")