SPARK 2014 is a programming language derived from Ada. SPARK 2014 has been developed with compile-time proof of absence of run-time errors in mind. It is possible to write programs as a mix of SPARK 2014 and Ada 2012.
Questions tagged [spark-2014]
20 questions
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Equivalence between C/frama-c and Spark-ada
I'm studying the framework Frama-c, and I'm wondering if there is an equivalence between C/Frama-c and Spark Ada. I know that it can seem quite odd to compare such different languages, but after reading David A. Wheeler's article, Johannes Kanig's…
Eliott.CH
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"Assertion might Fail" and Precondition doesn't solve it
I have a function that monitors a controlled signal by applying a simple check whether the signal is within a given tolerance band. The function is called is_within_limits. I have a second function called is_within_expanded_limits that does the same…
Simon
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How to prove a SPARK.Text_IO procedure precondition will hold
I'm using SPARK.Text_IO from the spark_io example in SPARK Discovery 2017.
My problem is that many of the SPARK.Text_IO procedures have a precondition that I do not know how to begin to try to prove namely that the standard input is readable and…
LT 'syreal' Jones
- 97
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Expression for finding an index in an array
How can I find the first character in a string that is the space character and return its index, with a single expression that can be used as part of Contract_Cases?
For example, if the string is:
Input : constant String := "abc def";
then the…
rid
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Describing a String type in Ada
I have a type similar to:
type ID is new String (1 .. 7);
-- Example: 123-456
How can I specify that format in code, either with Ada or SPARK?
I was thinking about Static_Predicate, but the condition that the string must start with 3 positive…
rid
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