Using_BLISS

   This section contains some basic examples that show what SCA can
   do to help you with your programs. The examples have very little
   explanation. For a more detailed explanation of the underlying
   concepts, see the Basic_Query_Concepts help topic. The remainder
   of this section is written in terms that are specific to BLISS
   programs.

   If you want to follow along and try the examples, you will need to
   have an SCA library available. If you do not know how to create
   an SCA library, read the Building_An_SCA_Library help topic. The
   examples use generic variable names (such as i). You will have to
   substitute variable names that actually exist in your code when
   trying the examples.

   The first example is the easiest query. It lets you find all the
   items in your SCA library named i, and shows you all the places
   where they appear (all occurrences of i):

   FIND i

   You can search for any name in this manner, including using
   wildcard characters (for example, FIND i*).

   Now suppose you are looking for an occurrence, and you know that
   it occurs in a particular file. The following query finds all
   occurrences of items that are named i, but will then limit them to
   those that happen to occur in the file named PROG.B32.

   FIND i AND FILE_SPEC="PROG.B32"

   Another typical question you might ask is, "Find all the places
   where this item is assigned to (or read from, called, declared and
   so forth)." The next example finds all occurrences of items that
   are named i, but then limits them to only those occurrences where
   i is assigned a value:

   FIND i AND OCCURRENCE=WRITE

   (SCA understands many occurrence classes other then WRITE. See the
   help subtopics under Getting_Started for tables containing all the
   SCA attributes and their corresponding meanings in BLISS.)

   Often, you only want to know where (in what file or module) a
   particular routine is, so that you can go to it and edit it. You
   can use the first query (where i will be the name of the routine)
   and then look through the output. The output will include all
   occurrences of the routine, one of which will be its declaration,
   which you can then select. Or, you can ask SCA to limit the search
   for you by typing the following query:

   FIND i AND OCCURRENCE=PRIMARY

   In SCA terms, a primary declaration is the most significant
   declaration of an item. For a BLISS routine, this means the
   place where the routine is actually implemented. This is in
   contrast to FORWARD or EXTERNAL declarations, which are associated
   declarations.

   Another problem you might have is that there are many different
   items in your system having a given name. Some may be variables;
   others may be routines, literals, macros, and so forth. Suppose
   you want to find only the routines named i. Again, the query
   FIND i will give you what you wanted, but it will also give you
   much more. It is preferable to issue the following query:

   FIND i AND SYMBOL_CLASS=ROUTINE

   The last four examples have all selected information based on two
   attributes. The last example selected information based on a name
   attribute (in this case, i) and a symbol_class attribute (in this
   case, ROUTINE). Note how the attributes are combined using the
   boolean operator AND. In general, you can select items out of your
   library based on any combination of attributes, using AND as well
   as the other logical operators OR, XOR, and NOT.

   The next example shows another primary feature of SCA - the
   ability to display relationships between items. This example shows
   the most common use of this feature. It finds the complete call
   tree (that is, all routines called directly and indirectly) of the
   routine named i.

   FIND CALLED_BY (i, DEPTH=ALL)

   If you want to limit the depth of the call tree, replace the
   keyword ALL by any positive integer.

   The final part of this section describes how to go directly to the
   source code once you have issued a query. After issuing the query
   FIND i, for example, you can have an LSE query buffer containing
   something that looks like the following:

     I variable
         BLISS_MODULE\60     LOCAL declaration
         BLISS_MODULE\75     write reference
         BLISS_MODULE\79     read reference
         BLISS_MODULE\122    read reference
         BLISS_MODULE\144    write reference
         BLISS_MODULE\146    read reference
         BLISS_MODULE\149    write reference
         BLISS_MODULE\149    read reference
         BLISS_MODULE\150    read reference
         BLISS_MODULE\166    read reference

   The first two lines of this display will be highlighted. The first
   line represents the item you looked for (i), and the rest of the
   lines represent the different places in the code where this item
   occurred (that is, the occurrences of i). By using the up and down
   arrows on your keyboard, or by clicking on an occurrence with your
   mouse, you can choose the occurrence you want to see. Then, type
   CTRL/G (the keyboard equivalent of the GOTO SOURCE command) and
   LSE will bring the source file into a buffer and position you at
   the occurrence you chose.

   To obtain help on the following topics, request help as indicated.

   o  For help on query language, see the Basic_Query_Concepts help
      topic.

   o  For help on libraries, see the Building_An_SCA_Library help
      topic.