ada

问题 My question is rather simple, as Google has let me down. How do I convert an unbounded string to an integer? If the string was bounded, I could do this: I : Integer := Integer'Value("613"); However, my string is unbounded, and Ada throws this error: expected type "Standard.String" found private type "Ada.Strings.Unbounded.Unbounded_String" Is what I want to do possible? 回答1: You just have to do the intermediate conversion: I : Integer := Integer'Value (To_String (T)); Here is a full test

问题 Is there some kind of implemented function that would allow to transform an integer to float and vice versa? I managed to write a short function that transforms an integer to float: function Transform(First: Integer) return Float is A: Integer := First; B: Float := 0.0; begin For_Loop: for I in Integer range 1 .. A loop B := B + 1.0; end loop For_Loop; return B; end Transform; But I don't know how to go from Float to Integer . 回答1: Ada can do explicit type conversions with Ada.Text_IO; use

问题 I have a large array in C that I wish to move into my ada project. That array is used to store filenames for assets which will later be loaded. It looks something like: const char *filenames[NUMBER_OF_FILES] = { /* file[0] */ "res/0.file", /* ... */ /* file[n] */ "res/some_more/complicated/file.name" }; I want to move this into an ada package body, but can't find a decent way to do it. Obviously my first attempt was: filenames : constant array (File_Index) of String := ( index_0 => "res/0

问题 I'm trying to define an array of Strings in Ada to store Strings of variable size. The problem I have is that I must pre-define the size of my Strings which I don't know at compile time, and with the Unbounded_Strings the String_Split.Create wouldn't work, as it requires Standard.String. Below is my code, where I need to be able to parse Strings of variable size, and not just the fixed length 4. Thanks in advance. type StrArray is array(1..7) of String(1..4); function Split(Line : String;Sep

问题 I'm currently implementing an Ada 2005 parser using Pyparsing and the reference manual grammar rules. We need this in order to analyze and transform parts of our aging Ada-codebase to C/C++. Most things work. However, one little annoying problem remains: The grammar rule name when parsing scoped identifiers (rule selected_component ) such as the expression "Global_Types.Integer2" fails because it is part of a left-associative grammar rule cycle. I believe this rule is incorrectly written: the

问题 I'm using GNAT GPS studio IDE in order to train a bit in Ada. I'm having an issue with package visibility. First I specify a package in a file called "DScale.ads" containing a type: package DScale is type DMajor is (D, E, F_Sharp, G, A, B, C_Sharp); end DScale; Then I specify in a different file ("Noteworthy.ads") a package that defines a procedure that will use the DMajor type of the DScale package: with Ada.Text_IO; with DScale; package NoteWorthy is procedure Note; end NoteWorthy; Finally

问题 This question already has answers here : Closed 7 years ago . Possible Duplicate: lgfortran not found I must admit that my question can be considered to be very similar to lgfortran not found, but as I am a newbie in Linux I need more help and I couldn't find what I am looking for in the above post. I have a fresh linux mint Debian edition installed and I am trying to make a lapack binding for Ada to work. If I check for gfortran, I get: gfortran-4.6 -v Using built-in specs. COLLECT_GCC

问题 Basically, I have 2 files ( .adb and .ads). I am totally new to Ada and also how to compile 2 files. The program is of a basic stack implementation. I got this compile error when I compiled the .adb file. $ gcc -c test_adt_stack.adb abstract_char_stack.ads:22:01: end of file expected, file can have only one compilation unit The 2 files I have are: abstract_char_stack.ads ----------------------------------------------------------- package Abstract_Char_Stack is type Stack_Type is private;

问题 Can anyone supply me with simple working examples which illustrate the use of pragmas in Ada 2005 ? I understand that pragmas are used to priorities processes, just that I have not come across working examples ! Much appreciated ! 回答1: A search of comp.lang.ada for recent discussions about priorities has several interesting examples. This one seems particularly apropos to your question. Addendum: Two other exemplary sources are the Rationale for Ada 95 and Rationale for Ada 2005 回答2: An Ada

问题 I've been looking around the web for an hour and I'm just giving up to ask it here... I've got to work under Ada. I managed to make gnat work as a command line to compile my files. But I want to be able to have proper projects in Xcode. My problem is that I've found some templates on the to make ada default templates, I've copy pasted them a bit everywhere (/library/developer/ application support etc) but they never appear in the list when I want to create a project. My other problem is that