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For doing this part of the ASIS tutorial, you should have the
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executable of the asistant tool built, and this execitanle should be
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on your path. asistant is built as a part of the standard ASIS
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installation procedure. (If you do not have asistant built, refer to
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the ASIS-for-GNAT Installation Guide - the top-level README file -
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how to built it yourself).
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It would be nice if you would have read the asistant users' guide
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before doing the exercises in this part of the tutorial, but this is
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not really necessary. You can easily guess the meaning of the
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constructions of the asistant command language (more then a half of
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this language are ASIS queries), and the asistant scripts making up
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this tutorial contain enough comments to explain what happens. See
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also the quick asistant guide in the end of this readme file.
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You should do the following preparation to run these exercises:
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- copy the whole content of this directory in your woprking
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- create the tree files for the Ada source files. The Ada sources
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included into this tutorial made up a simple Ada program having the
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procedure Ex_Proc as its main subprogram, so you can create the
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tree files by the following command:
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>gnatmake -c -gnatc -gnatt ex_proc.adb
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Now call asistant with the name of a script file as a parameter. A
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script file is a text file containg the sequence of the asistant
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This tutorial contains two scripts:
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black_box.scr - contains tasks for performing some black-box
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processing of ASIS Compilation Units;
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white_box.scr - contains tasks for performing some Element-level
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(white-box) processing of ASIS Compilation Units;
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Both scripts first demonstrate the effect of some ASIS queries and
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then formulate the task to solve. The scripts contain both the hints
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to find the solution and the version of the correct solution.
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So, to start doing this part of exercises, you should type in the
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> asistant black_box.scr
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> asistant white_box.scr
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and follow the information the script processing will output into the
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command line window. The general scheme of all the exercises is: when
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a script file is executed, it first performs some sequence of ASIS
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queries, then it outputs the text of a task for you to do and
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switches asistant into interactive mode. When resumed, it outputs the
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solution for the task.
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asistant is an interactive ASIS interpreter which allows to "execute"
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ASIS queries without writing the full ASIS application. asistant may
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also interprete a sequence of commands written in a file (called a
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script file), the input from the command line and from a script file
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asistant allows to define and initialize dynamic variables of basic
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ASIS types (Context, Compilation_Unit, Element) and some conventional
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types (integer, string, boolean). The asistant command 'set'
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> set (var, <some_expression>)
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defines an asistant variable 'var' and sets its type and initial
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value from the type and initial value of '<some_expression>'. The
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'set' command with a single parameter is used to define variables of
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the ASIS Context type.
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The asistant command 'print' outputs values of asistant variables and
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The asistant command 'pause', when used in a script file, paused the
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interpretation of the command from the script file. When the script
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is paused, asistant is switched into the interactive mode and a user
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can input commands from the command prompt.
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To resume the script, input the "run" command.
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To quit asistant, type the 'quit' command.
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If you make any error when working in the asistant environment,
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asistant does not change any variable, it just generates an error
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message and allows you to try again.
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asistant keeps its input in the file input.log, and it keeps the
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track of the session in the file session.log.
b'\\ No newline at end of file'
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tutorial/using_asistant/README
