Fruther tools moved

.gitignore

@@ -9,5 +9,7 @@ browser/BrowserGUI
 browser/SourceProgGUI
 curry2js/Curry2JS
 currydoc/CurryDoc
+currytest/CurryTest
+createmakefile/CreateMakefile
 genint/GenInt
 importcalls/ImportCalls

browser/AnalysisTypes.curry

+---------------------------------------------------------------------------------
+-- Definition of the datatypes for the various analyses contained in the browser.
+---------------------------------------------------------------------------------
+
+module AnalysisTypes(FunctionAnalysis(..),AnalysisResult(..),
+                     ModuleAnalysis(..),ModuleAnalysisResult(..),
+                     ContentsKind(..)) where
+
+import FlatCurry
+
+-----------------------------------------------------------------------------------
+-- Types for analyzing functions:
+-- Interface of various kinds of function analyses:
+data FunctionAnalysis a =
+   LocalAnalysis      (FuncDecl -> a)
+ | LocalDataAnalysis  ([TypeDecl] -> FuncDecl -> a)
+ | GlobalAnalysis     ([FuncDecl] -> [(QName,a)])
+ | GlobalDataAnalysis ([TypeDecl] -> [FuncDecl] -> [(QName,a)])
+
+-- The possible results of a function analysis:
+data AnalysisResult =
+   MsgResult String       -- a message to be shown in the browser
+ | ActionResult (IO ())   -- an I/O action to show the result externally
+
+
+-----------------------------------------------------------------------------------
+-- Types for analyzing complete modules:
+data ModuleAnalysis a =
+   InterfaceAnalysis  (Prog -> a)   -- analysis based on the module interface
+ | FlatCurryAnalysis  (Prog -> a)   -- analysis based on the FlatCurry representation
+ | SourceCodeAnalysis (String -> IO a) -- analysis based on the module's source file
+                                       -- (argument is the name of the source file)
+
+-- The possible results of a module analysis:
+data ModuleAnalysisResult =
+   ContentsResult ContentsKind String  -- a program to be shown in main contents window
+ | ModuleAction (IO ())                -- an I/O action to show the result externally
+
+
+-- Kind of contents produced as the result of a module analysis
+-- and shown in the main content window:
+data ContentsKind =
+    CurryProg      -- Curry source code
+  | LCurryProg     -- Literate Curry source code
+  | FlatCurryExp   -- FlatCurry expression
+  | OtherText      -- some other text
+

browser/BrowserAnalysis.curry

+-----------------------------------------------------------------------------
+-- Definition of the various analyses contained in the browser.
+--
+-- To modify or extend the analysis functionality of the browser,
+-- add access to a new analysis here and recompile the browser.
+-----------------------------------------------------------------------------
+
+module BrowserAnalysis(moduleAnalyses,allFunctionAnalyses,functionAnalyses) where
+
+import AnalysisTypes
+import FlatCurry
+import FlatCurryGoodies
+import FlatCurryShow(showFlatFunc)
+import Overlapping
+import PatternComplete
+import SolutionComplete
+import Nondeterminism
+import Dependency
+import Indeterminism
+import CalledByAnalysis
+import Linearity
+import AddTypes
+import ShowFlatCurry
+import List(intersperse)
+import Imports
+import FileGoodies(stripSuffix)
+import ShowGraph
+
+infix 1 `showWith`,`showWithMsg`
+
+-----------------------------------------------------------------------------------
+-- The list of all available analyses for individual modules.
+-- Each analysis must return a string representation of its analysis result
+-- or an IO action to show the result.
+moduleAnalyses :: [(String, ModuleAnalysis ModuleAnalysisResult)]
+moduleAnalyses =
+ [("Interface",
+   InterfaceAnalysis (\int -> ContentsResult CurryProg (showInterface False int))),
+  --("Write Interface",
+  -- InterfaceAnalysis (\int -> ModuleAction (putStrLn (showInterface False int)))),
+  --("Read source file",
+  -- SourceCodeAnalysis (\fname -> readFile fname >>= \prog ->
+  --                               return (ContentsResult CurryProg prog))),
+  ("Curry code (generated from FlatCurry)",
+   FlatCurryAnalysis (\prog -> ContentsResult CurryProg (showCurryMod False prog))),
+  ("Source program with type signatures added", SourceCodeAnalysis addTypes),
+  ("FlatCurry code",
+   FlatCurryAnalysis (\prog -> ContentsResult CurryProg (showCurryMod True prog))),
+  ("FlatCurry expression",
+   FlatCurryAnalysis (\prog -> ContentsResult FlatCurryExp (showFlatProg prog)))]
+
+addTypes :: String -> IO ModuleAnalysisResult
+addTypes fname
+ | take 7 (reverse fname) == "yrrucl."
+  = return (ContentsResult OtherText "Can't add types to literate programs")
+ | otherwise
+  = do prog <- addTypeSignatures (stripSuffix fname)
+       return (ContentsResult CurryProg prog)
+
+-----------------------------------------------------------------------------------
+-- The list of all available analyses for individual functions.
+-- Each analysis must return a string or an IO action representation of its
+-- analysis result.
+functionAnalyses :: [(String, FunctionAnalysis AnalysisResult)]
+functionAnalyses =
+ [("Curry code",        LocalAnalysis     (MsgResult . showFuncDeclAsCurry)),
+  --("Print Curry code",  withAction (LocalAnalysis (putStr . showFuncDeclAsCurry))),
+  --("Print func name",   withAction (GlobalAnalysis printFuncName)),
+  ("FlatCurry code",    LocalAnalysis     (MsgResult . showFuncDeclAsFlatCurry)),
+  ("FlatCurry expression",LocalAnalysis   (MsgResult . showFlatFunc)),
+  ("Calls directly",    LocalAnalysis     callsDirectly `showWithMsg`
+       showQDep "Calls the following functions directly in the right-hand sides:"),
+  ("Depends on",        GlobalAnalysis    indirectlyDependent `showWithMsg`
+       showQDep "Depends on the following functions:"),
+  ("Depends on externals", GlobalAnalysis  externalDependent `showWithMsg`
+       showQDep "Depends on the following external functions:"),
+  ("Dependency graph (DOT)", withAction (GlobalAnalysis viewFuncDepGraphs)),
+  ("Local dependency graph (DOT)", withAction (GlobalAnalysis viewFuncLocalDepGraphs)),
+  ("Called by",         GlobalAnalysis    calledBy `showWithMsg`
+       showDep "Is called by the following functions of the current module:"),
+  ("Overlapping rules",
+   LocalAnalysis     isOverlappingFunction   `showWithMsg` showOverlap),
+  ("Right-linear rules",
+   LocalAnalysis     hasRightLinearRules     `showWithMsg` showLinear),
+  ("Right-linearity",
+   GlobalAnalysis    analyseRightLinearity   `showWithMsg` showLinearity),
+  ("Pattern completeness",
+   LocalDataAnalysis analyseCompleteness     `showWithMsg` showComplete),
+  ("Totally defined",
+   GlobalDataAnalysis analyseTotallyDefined  `showWithMsg` showComplete),
+  ("Solution complete",
+   GlobalAnalysis    analyseSolutionComplete `showWithMsg` showOpComplete),
+  ("Nondeterministic",
+   GlobalAnalysis    analyseNondeterminism   `showWithMsg` showNondet),
+  ("Set-valued",        GlobalAnalysis    analyseSetValued `showWithMsg` showSetValued),
+  ("Purity",            GlobalAnalysis    analyseIndeterminism `showWithMsg` showIndet)]
+
+
+-- The list of all available analyses for sets of functions.
+-- Each analysis must return a short(!) string representation (no more than a few chars)
+-- of its analysis result that is prefixed to the function name in the list
+-- of function. The second (String) component of each analysis entry is a short
+-- explanation of the used prefixes.
+allFunctionAnalyses :: [(String, String, FunctionAnalysis String)]
+allFunctionAnalyses =
+ [("Overlapping rules",
+   "Meaning of function markings:\n\n"++
+   "OVL>>>  : defining rules overlap\n\n"++
+   "unmarked: no overlapping rules",
+   LocalAnalysis     isOverlappingFunction `showWith` showBool "OVL>>>" ""),
+  ("Pattern completeness",
+   "Meaning of function markings:\n\n"++
+   "INCMP>>> : possibly incompletely defined operation\n\n"++
+   "unmarked : completely defined operation",
+   LocalDataAnalysis analyseCompleteness   `showWith` showCompleteS),
+  ("Totally defined",
+   "Meaning of function markings:\n\n"++
+   "PARTIAL>>> : possibly partially defined operation\n\n"++
+   "unmarked : totally defined operation",
+   GlobalDataAnalysis analyseTotallyDefined `showWith` showTotally),
+  ("Solution complete",
+   "Meaning of function markings:\n\n"++
+   "SUSP>>> : operation may suspend\n\n"++
+   "unmarked: operation does not suspend",
+   GlobalAnalysis    analyseSolutionComplete `showWith` showBool "" "SUSP>>>"),
+  ("Nondeterministic",
+   "Meaning of function markings:\n\n"++
+   "ND>>>   : nondeterministic operation\n\n"++
+   "unmarked: deterministic operation",
+   GlobalAnalysis    analyseNondeterminism `showWith` showBool "ND>>>" ""),
+  ("Right-linearity",
+   "Meaning of function markings:\n\n"++
+   "RL>>>   : defined by right-linear rules and depend only on\n"++
+   "          right-linear functions\n\n"++
+   "unmarked: possibly non-right-linear",
+   GlobalAnalysis    analyseRightLinearity `showWith` showBool "RL>>>" ""),
+  ("Set-valued",
+   "Meaning of function markings:\n\n"++
+   "SET>>>  : set-valued operation\n\n"++
+   "unmarked: single-valued operation",
+   GlobalAnalysis    analyseSetValued      `showWith` showBool "SET>>>" ""),
+  ("Purity",
+   "Meaning of function markings:\n\n"++
+   "IMP>>>  : impure (indeterministic) operation\n\n"++
+   "unmarked: referentially transparent operation",
+   GlobalAnalysis    analyseIndeterminism  `showWith` showBool "IMP>>>" "")]
+
+-- This function is useful to integrate an existing program analysis
+-- into the browser by providing a transformation of the analysis results
+-- into strings:
+showWith :: FunctionAnalysis a -> (a->String) -> FunctionAnalysis String
+showWith (LocalAnalysis ana) showresult =
+   LocalAnalysis (\f -> showresult (ana f))
+showWith (LocalDataAnalysis ana) showresult =
+   LocalDataAnalysis (\types f -> showresult (ana types f))
+showWith (GlobalAnalysis ana) showresult =
+   GlobalAnalysis (\funs -> map (\(name,res)->(name,showresult res)) (ana funs))
+showWith (GlobalDataAnalysis ana) showresult =
+   GlobalDataAnalysis (\types funs -> map (\(name,res)->(name,showresult res))
+                                          (ana types funs))
+
+showWithMsg :: FunctionAnalysis a -> (a->String) -> FunctionAnalysis AnalysisResult
+showWithMsg (LocalAnalysis ana) showresult =
+   LocalAnalysis (\f -> MsgResult (showresult (ana f)))
+showWithMsg (LocalDataAnalysis ana) showresult =
+   LocalDataAnalysis (\types f -> MsgResult (showresult (ana types f)))
+showWithMsg (GlobalAnalysis ana) showresult =
+   GlobalAnalysis (\funs -> map (\(name,res)->(name,MsgResult (showresult res)))
+                                (ana funs))
+showWithMsg (GlobalDataAnalysis ana) showresult =
+   GlobalDataAnalysis (\types funs -> map (\(name,res)->(name,MsgResult (showresult res)))
+                                          (ana types funs))
+
+-- Shows a Boolean result:
+showBool :: String -> String -> Bool -> String
+showBool t _ True  = t
+showBool _ f False = f
+
+-- Shows the result of the overlapping analysis.
+showOverlap :: Bool -> String
+showOverlap True  = "Overlapping"
+showOverlap False = "Not Overlapping"
+
+-- Shows the result of the right-linear rules analysis.
+showLinear :: Bool -> String
+showLinear True  = "Defined by right-linear rules"
+showLinear False = "Definition contains non-right-linear rules"
+
+-- Shows the result of the right-linearity analysis.
+showLinearity :: Bool -> String
+showLinearity True  = "Defined by functions with right-linear rules"
+showLinearity False = "Defined by functions containing non-right-linear rules"
+
+-- Shows the result of the completeness analysis.
+showComplete :: CompletenessType -> String
+showComplete Complete     = "completely defined (i.e., reducible on all constructors)"
+showComplete InComplete   = "incompletely defined"
+showComplete InCompleteOr =
+                    "incompletely defined in each disjunction (but might be complete)"
+
+showCompleteS :: CompletenessType -> String
+showCompleteS Complete     = ""
+showCompleteS InComplete   = "INCMP>>>"
+showCompleteS InCompleteOr = "INCMP>>>"
+
+-- Shows the result of the totally-defined analysis.
+showTotallyDefined :: CompletenessType -> String
+showTotallyDefined Complete     = "totally defined (i.e., reducible to a value)"
+showTotallyDefined InComplete   = "partially defined"
+showTotallyDefined InCompleteOr = "partially defined"
+
+showTotally :: CompletenessType -> String
+showTotally Complete     = ""
+showTotally InComplete   = "PARTIAL>>>"
+showTotally InCompleteOr = "PARTIAL>>>"
+
+-- Shows the result of the operational completeness analysis.
+showOpComplete :: Bool -> String
+showOpComplete True  = "All solutions can be computed"
+showOpComplete False = "Evaluation might suspend"
+
+-- Shows the result of the indeterminism analysis.
+showIndet :: Bool -> String
+showIndet True  = "Impure (indeterministic) operation"
+showIndet False = "Referentially transparent"
+
+-- Shows the result of the non-determinism analysis.
+showNondet :: Bool -> String
+showNondet True  = "Operation might be nondeterministic"
+showNondet False = "Deterministic operation"
+
+-- Shows the result of the set-valued analysis.
+showSetValued :: Bool -> String
+showSetValued True  = "Operation might be set-valued"
+showSetValued False = "Single-valued operation"
+
+-- Shows the result of a dependency analysis with title.
+showQDep :: String -> [QName] -> String
+showQDep title fnames = title ++ "\n" ++ unlines (map (\(m,n)->m++"."++n) fnames)
+
+-- Shows the result of a dependency analysis with title without qualifiers.
+showDep :: String -> [QName] -> String
+showDep title fnames = title ++ "\n" ++ unlines (map snd fnames)
+
+-- Visualize the result of the dependency graph analysis.
+viewFuncDepGraphs :: [FuncDecl] -> [(QName,IO ())]
+viewFuncDepGraphs fdecls =
+  map (\(f,fgraph)->(f,showDGraph f (isExternal fdecls) fgraph))
+      (dependencyGraphs fdecls)
+
+isExternal [] _ = True -- this case should not occur
+isExternal (Func g _ _ _ rule : gs) f = if f==g then isExternalRule rule
+                                                else isExternal gs f
+ where
+   isExternalRule (Rule _ _) = False
+   isExternalRule (External _) = True
+
+-- Visualize the result of the local dependency graph analysis.
+viewFuncLocalDepGraphs :: [FuncDecl] -> [(QName,IO ())]
+viewFuncLocalDepGraphs fdecls =
+  map (\(f,fgraph)->(f,showDGraph f (\(m,_)->m/=fst f) fgraph))
+      (localDependencyGraphs fdecls)
+
+showDGraph :: QName -> (QName->Bool) -> [(QName,[QName])] -> IO ()
+showDGraph (mod,_) isExt fnames =
+   viewDependencyGraph
+       (map (\(f,gs)->(showLocalName f,
+                       if isExt f then extAttrs else [],
+                       map showLocalName gs))
+            fnames)
+ where
+  showLocalName (m,g) = if m==mod then g else m++'.':g
+
+  -- dot attributes for visualization of external function nodes:
+  extAttrs = [("style","filled"),("color",".7 .3 1.0")]
+
+--------------------------------------------------------------------------------
+-- This function is useful to integrate an existing program analysis
+-- with result type (IO a) into the browser by providing a transformation
+-- of the analysis results.
+withAction :: FunctionAnalysis (IO _) -> FunctionAnalysis AnalysisResult
+withAction (LocalAnalysis ana) =
+   LocalAnalysis (\f -> ActionResult (ana f >> done))
+withAction (LocalDataAnalysis ana) =
+   LocalDataAnalysis (\types f -> ActionResult (ana types f >> done))
+withAction (GlobalAnalysis ana) =
+   GlobalAnalysis (\funs -> map (\(name,res)->(name,ActionResult (res >> done)))
+                                (ana funs))
+withAction (GlobalDataAnalysis ana) =
+   GlobalDataAnalysis (\types funs -> map (\(name,res)->(name,ActionResult (res>>done)))
+                                          (ana types funs))
+
+-- A simple example for a global function analysis of type IO:
+printFuncName :: [FuncDecl] -> [(QName,IO ())]
+printFuncName = map (\fdecl -> (funcName fdecl, putStrLn (unqualifiedName fdecl)))

browser/Extend.txt

+How to extend CurryBrowser:
+===========================
+
+CurryBrowser is designed as a generic analysis tool for declarative
+programs. In particular, it provides some infrastructure to integrate
+new program analyses implemented in Curry.
+The ideas of this infrastructure are described in this paper:
+
+M. Hanus: A Generic Analysis Environment for Declarative Programs
+Proc. of the International Workshop on Curry and Functional Logic
+Programming (WCFLP 2005), pp. 43-48, ACM Press, 2005
+http://www.informatik.uni-kiel.de/~mh/publications/papers/WCFLP05.html
+
+
+In the current implementation of CurryBrowser, the following steps
+are necessary to integrate a new program analysis (here, BROWSERDIR
+denotes the implementation directory of CurryBrowser):
+
+1. Implement the new program analysis in a Curry module as a function
+   of one of the types used in the module BROWSERDIR/AnalysesTypes.curry.
+   For instance, a global analyses could be of type 
+     myana :: [FuncDecl] -> [(QName,a)]
+   Example analyses can be found in the directory BROWSERDIR/analysis.
+
+2. Include the new analysis in the file BROWSERDIR/BrowserAnalysis.curry,
+   i.e., import the module containing the new analysis and add the
+   corresponding analysis function in one of the list constants
+   specifying the current analyses (e.g., functionAnalyses,
+   allFunctionAnalyses, moduleAnalyses).
+
+3. Run "make" in BROWSERDIR.
+
+If everything runs well, the new analysis is available with the next
+invocation of CurryBrowser.
+
+If your analysis is of general interest for Curry users, please sent it
+to Michael Hanus <mh@informatik.uni-kiel.de> so that it can be included
+in future distributions of the CurryBrowser.

browser/FlatCurryGoodies.curry

+-- Some useful operations on FlatCurry programs:
+
+module FlatCurryGoodies where
+
+import FlatCurry
+
+moduleName (Prog mod _ _ _ _) = mod
+
+importsOfProg :: Prog -> [String]
+importsOfProg (Prog _ imps _ _ _) = imps
+
+typesOfProg (Prog _ _ types _ _) = types
+
+funcsOfProg (Prog _ _ _ funcs _) = funcs
+
+
+funcName (Func fname _ _ _ _) = fname
+
+unqualifiedName (Func fname _ _ _ _) = snd fname
+
+funcModule (Func fname _ _ _ _) = fst fname
+
+isPublic :: FuncDecl -> Bool
+isPublic (Func _ _ vis _ _) = vis==Public

browser/Help.txt

+How to use CurryBrowser:
+========================
+
+CurryBrowser is a tool to browse through the modules and
+functions of programs written in the declarative multi-paradigm
+language Curry.
+
+It contains operations to analyze the properties of functions
+of a Curry module. Moreover, it is constructed in a way so that
+new analyzers can be easily connected to CurryBrowser
+(see the source code of module "BrowserAnalysis" for details).
+
+
+Start CurryBrowser:
+===================
+
+CurryBrowser is part of the Curry systems PAKCS and KiCS2
+and can be started in two ways:
+
+- In the command shell via the command: [[pakcs|kics2]/bin/]currybrowse mod
+
+- In the PAKCS/KiCS2 environment after loading the module "mod" and typing
+  the command ":browse"
+
+Here, "mod" is the name of the main module of a Curry application.
+After the start, CurryBrowser loads the interfaces of the main
+module and all imported modules before a GUI is created.
+
+
+The GUI of CurryBrowser:
+========================
+
+Selecting modules and imports:
+------------------------------
+The column "Select module" shows the hierarchical structure of
+modules and their imports. If a module name is prefixed by "+",
+its imports are not shown. Clicking on such a module name will
+open their imports, i.e., all directly imported modules are
+shown below. The imported module names are indented so that
+the hierarchy is directly visible.
+
+After selecting a module in the list of modules, its source code,
+interface, or various other formats of the module can be shown
+in the main (right) text area (see menu "Show selected module as...").
+Furthermore, various properties of all exported functions defined in
+the selected module can be analyzed (see menu "Analyse selected module").
+If the function list box contains all functions of the selected
+module, then all of them are analyzed by this menu, otherwise
+the exported ones are loaded before analyzing them.
+
+Finally, the list of exported or all functions defined in the
+selected module or various other list of functions (see menu
+"Select functions...") can be shown in the left lower "Functions"
+column.
+
+
+Selecting functions:
+--------------------
+After selecting and showing a list of functions in the left lower
+column, individually selected functions can be analyzed by selecting
+a function analysis (see menu "Select analysis...") from the list of
+available analysis.
+
+
+Analyzing functions:
+--------------------
+The results of the analysis of individually selected functions
+are shown in the lower right text area, and the results of analyzing
+complete modules are shown by prefixes in the function list box
+(the explanation about these prefixes are shown in the lower right
+text area).
+
+Note that the analyses require different amounts of time.
+Local analyses are usually fast since they are based on looking
+on the code of an indiviual function only, whereas global analyses
+require the consideration of all functions occurring on the module
+and their (directly and indirectly) imported modules.
+
+
+Focusing functions:
+-------------------
+If the button "focus in code" is checked, individually selected
+functions are focused in the source code, i.e., whenever a function
+is selected in the function list box, the source code of the
+corresponding module is shown in the right text area
+where the focus is put on the definition of the function.
+Note that, if you select a function that has been introduced
+by some compiler transformations (e.g., lambda lifting),
+the source code cannot be focused on this function.
+
+
+The analyses of CurryBrowser:
+=============================
+
+The following analysis are currently available:
+
+Curry code (local analysis):
+----------------------------
+Show the intermediate FlatCurry code in (almost) Curry syntax,
+whenever possible.
+
+FlatCurry code (local analysis):
+--------------------------------
+Show the intermediate FlatCurry code in human-readable syntax.
+This is useful to see the pattern matching in the form of case
+expressions.
+
+FlatCurry expression (local analysis):
+--------------------------------------
+Show the intermediate FlatCurry code as an expression according
+to the FlatCurry representation in the Curry module "FlatCurry".
+
+Calls directly (local analysis):
+--------------------------------
+Which functions are directly called in the rules defining this
+function? Since the called functions are shown qualified with
+their module name, the result is useful to spot the directly
+called functions in larger applications.
+
+Depends on (global analysis):
+-----------------------------
+On which functions does the current function depend, i.e., what
+are the functions that might be called (directly or indirectly)
+when this function is executed?
+
+Depends on externals (global analysis):
+---------------------------------------
+On which external functions (i.e., functions that are not
+defined in Curry) does the current function depend, i.e., what
+are the external functions that might be called (directly or
+indirectly) when this function is executed?
+
+Dependency graph (global analysis):
+-----------------------------------
+Show the complete dependency graph of the selected function
+(with the graph visualization tool "dot").
+
+Local dependency graph (global analysis):
+-----------------------------------------
+Show the dependency graph of the selected function local
+to the current module, i.e., do not show dependencies
+that are defined in imported modules. Thus, imported functions
+are leaves of the dependency graph that are shown in a different
+layout.
+
+Called by (global analysis):
+----------------------------
+Which functions of the current module call this function
+directly or indirectly?
+
+Overlapping rules (local analysis):
+-----------------------------------
+Is the function defined by overlapping left-hand sides?
+
+Right-linear rules (local analysis):
+------------------------------------
+Is the function defined by right-linear rules?
+
+Right-linearity (global analysis):
+----------------------------------
+Is the function defined by right-linear rules and does it only depend
+on functions defined by right-linear rules?
+
+Pattern completeness (local analysis):
+--------------------------------------
+Is the pattern matching exhaustive, i.e., is the function reducible
+for any (well-typed) ground constructor arguments?
+
+Totally defined (global analysis):
+----------------------------------
+Is the function totally defined, i.e., does the function evaluate to a value
+for any (well-typed) ground constructor arguments?
+
+Solution complete (global analysis):
+------------------------------------
+Is the function operationally complete, i.e., does its execution
+not suspend for any arguments?
+
+Nondeterministic (global analysis):
+-----------------------------------
+Is the function nondeterministic, i.e., is it directly or indirectly
+defined by overlapping rules so that it might deliver
+(nondeterministically) two values for the same ground constructor
+arguments?
+
+Set-valued (global analysis):
+-----------------------------
+Is the function set-valued, i.e., is it directly or indirectly defined
+by overlapping rules or rules containing extra variables so that
+an application to some ground constructor arguments is equal to
+different values?
+
+Purity (global analysis):
+-------------------------
+Is the function pure (referentially transparent), i.e., is it ensured
+that it delivers always the same values for the same ground constructor
+arguments at each time and all schedulings of the evaluation?
+This might not be the case if committed choice or sending via ports
+is executed.

browser/Imports.curry

+-----------------------------------------------------------------
+-- A library to get the import structures of a program.
+
+module Imports(getImportedInterfaces,moduleImports,readFlatCurryFileInLoadPath,
+               findFileInLoadPath,InterfaceOrFlatProg(..),ifOrProg,progOfIFFP)
+  where
+
+import FlatCurry
+import FlatCurryGoodies
+import FlatCurryRead
+import FileGoodies
+import System(getArgs)
+import Distribution(getLoadPath,addCurrySubdir)
+import Directory
+import Maybe
+
+-- Get all interfaces (i.e., main and all indirectly imported modules) of a program:
+getImportedInterfaces :: String -> IO [(String,InterfaceOrFlatProg)]
+getImportedInterfaces mod = do
+  args <- getArgs
+  imps <- readFlatCurryIntWithImports (if null args
+                                       then mod
+                                       else dirName(head args)++"/"++mod)
+  return (map (\prog -> (moduleName prog, IF prog)) imps)
+
+-- Extract a module and its imports:
+moduleImports (Prog mod imps _ _ _) = (mod,imps)
+