Macro coding question

[gddeluca]

I'm trying to create a macro which will call a Procedure and pass it the value of one of the macro operands as a literal (i.e. within quotes)

But so far I cannot find a syntax which works.

Here's a short sample. I want to Call the SQL procedure passing the 'Field' macro operand surrunded by quotes -- as a string literal.

Code: Select all

Declare SQL(Field.S)
Macro SetEnv(Field, value)
   ENV\Field = value
   SQL(#DQUOTE$ # Field # #DQUOTE$)
EndMacro 

Structure ENVData
   StrField.S
EndStructure

ENV.ENVData
ENV\StrField = "Hello"

SetEnv(StrField, "GoodBye")
Debug Env\StrField

Procedure SQL(field.S)
   Debug "SQL: " + field
EndProcedure   

[normeus]

Lately I am having a hard time understanding the questions, here is what I think you want:

Code: Select all

  Macro DoubleQuote
    "
  EndMacro

Declare SQL(Field.S)
Macro SetEnv(Field, value)
   ENV\Field = value
   SQL(DoubleQuote#Field#DoubleQuote)
EndMacro 

Structure ENVData
   StrField.S
EndStructure

ENV.ENVData
ENV\StrField = "Hello"

SetEnv(StrField, "GoodBye")
Debug Env\StrField

Procedure SQL(field.S)
   Debug "SQL: " + field
EndProcedure   

Norm

[gddeluca]

Exactly what I want.

Is there a reason to have the macro to create a " ??

I tried variations with #DQUOTE$, ~"\"", etc using both + and # to concatenate strings - all failed.

Many thanks.

[infratec]

Yes, it's a bit tricky:

Code: Select all

Declare SQL(Field.S)

Macro DoubleQuote
  "
EndMacro


Macro SetEnv(Field, value)
   ENV\Field = value
   SQL(DoubleQuote#Field#DoubleQuote)
EndMacro 

Structure ENVData
   StrField.S
EndStructure

ENV.ENVData
ENV\StrField = "Hello"

SetEnv(StrField, "GoodBye")
Debug Env\StrField

Procedure SQL(field.S)
   Debug "SQL: " + field
EndProcedure   

This works too, but looks even more ugly:

Code: Select all

Macro SetEnv(Field, value)
  ENV\Field = value
  SQL(DoubleQuote#Field#") 
EndMacro

Ups second winner is first looser

You need the DoubleQuote Macro that you can use the expand #

[gddeluca]

Thanks. Just getting into PureBasic (coming from PowerBasic) so right now I'm mostly experimenting how I might be able to port some of the data structures for my app. It was heavily into using Objects with PowerBasic, but that's out. I looked at a posting of a possible way to do Objects in PureBasic, but, Boy! they were really kludgy. Just didn't seem worth the effort.