// ----- Statements -------------------------------------------------------------
protected override void EmitPrintStmt(TargetWriter wr, Expression arg)
{
wr.Indent();
wr.Write("console.log(");
TrExpr(arg, wr, false);
wr.WriteLine(");");
}
// ----- Statements -------------------------------------------------------------
protected override void EmitPrintStmt(TargetWriter wr, Expression arg)
{
wr.Indent();
wr.Write("process.stdout.write(");
TrParenExpr(arg, wr, false);
wr.WriteLine(".toString());");
}
protected override void EmitReturn(List <Formal> outParams, TargetWriter wr)
{
wr.Indent();
if (outParams.Count == 0)
{
wr.WriteLine("return;");
}
else if (outParams.Count == 1)
{
wr.WriteLine("return {0};", IdName(outParams[0]));
}
else
{
wr.WriteLine("return [{0}];", Util.Comma(outParams, IdName));
}
}
protected override void DeclareLocalVar(string name, Type /*?*/ type, Bpl.IToken /*?*/ tok, Expression rhs, bool inLetExprBody, TargetWriter wr)
{
wr.Indent();
wr.Write("let {0} = ", name);
TrExpr(rhs, wr, inLetExprBody);
wr.WriteLine(";");
}
protected override void EmitHeader(Program program, TargetWriter wr)
{
wr.WriteLine("// Dafny program {0} compiled into JavaScript", program.Name);
wr.WriteLine(@"
let _dafny = (function() {
let $module = {};
$module.Tuple = class Tuple extends Array {
constructor(...elems) {
super(...elems);
}
toString() {
return ""("" + this.join("", "") + "")"";
}
}
$module.Seq = class Seq extends Array {
constructor(...elems) {
super(...elems);
}
toString() {
return ""["" + this.join("", "") + ""]"";
}
}
$module.areEqual = function() {
return false; // TODO
}
$module.seqUpdate = function(s, i, v) {
let t = s.slice();
t[i] = v;
return t;
}
$module.newArray = function(initValue, ...dims) {
return { dims: dims, elmts: buildArray(initValue, ...dims) };
}
return $module;
function buildArray(initValue, ...dims) {
if (dims.length === 0) {
return initValue;
} else {
let a = Array(dims[0]);
let b = Array.from(a, (x) => buildArray(initValue, ...dims.slice(1)));
return b;
}
}
})();
");
}
protected override void DeclareLocalVar(string name, Type /*?*/ type, Bpl.IToken /*?*/ tok, bool leaveRoomForRhs, string /*?*/ rhs, TargetWriter wr)
{
wr.Indent();
wr.Write("let {0}", name);
if (leaveRoomForRhs)
{
Contract.Assert(rhs == null); // follows from precondition
}
else if (rhs != null)
{
wr.WriteLine(" = {0};", rhs);
}
else
{
wr.WriteLine(";");
}
}
// ----- Declarations -------------------------------------------------------------
protected override void DeclareField(string name, bool isStatic, bool isConst, Type type, Bpl.IToken tok, string rhs, TargetWriter wr)
{
wr.Indent();
if (isStatic)
{
var w = wr.NewNamedBlock("static get {0}()", name);
EmitReturnExpr(rhs, w);
}
else
{
wr.WriteLine("this.{0} = {1};", name, rhs);
}
}
protected override void EmitHeader(Program program, TargetWriter wr)
{
wr.WriteLine("// Dafny program {0} compiled into C#", program.Name);
wr.WriteLine("// To recompile, use 'csc' with: /r:System.Numerics.dll");
wr.WriteLine("// and choosing /target:exe or /target:library");
wr.WriteLine("// You might also want to include compiler switches like:");
wr.WriteLine("// /debug /nowarn:0164 /nowarn:0219 /nowarn:1717 /nowarn:0162 /nowarn:0168");
wr.WriteLine();
wr.WriteLine("using System;");
wr.WriteLine("using System.Numerics;");
EmitDafnySourceAttribute(program, wr);
if (!DafnyOptions.O.UseRuntimeLib)
{
ReadRuntimeSystem(wr);
}
}
protected override void EmitOutParameterSplits(string outCollector, List <string> actualOutParamNames, TargetWriter wr)
{
if (actualOutParamNames.Count == 1)
{
EmitAssignment(actualOutParamNames[0], outCollector, wr);
}
else
{
for (var i = 0; i < actualOutParamNames.Count; i++)
{
wr.Indent();
wr.WriteLine("{0} = {1}[{2}];", actualOutParamNames[i], outCollector, i);
}
}
}
/// <summary>
/// Generate a C# program from the Dafny program and, if "invokeCompiler" is "true", invoke
/// the C# compiler to compile it.
/// </summary>
public static bool CompileDafnyProgram(Dafny.Program dafnyProgram, string dafnyProgramName,
ReadOnlyCollection <string> otherFileNames, bool invokeCompiler,
TextWriter outputWriter = null)
{
Contract.Requires(dafnyProgram != null);
Contract.Assert(dafnyProgramName != null);
if (outputWriter == null)
{
outputWriter = Console.Out;
}
// Compile the Dafny program into a string that contains the target program
var oldErrorCount = dafnyProgram.reporter.Count(ErrorLevel.Error);
Dafny.Compiler compiler;
switch (DafnyOptions.O.CompileTarget)
{
case DafnyOptions.CompilationTarget.Csharp:
default:
compiler = new Dafny.CsharpCompiler(dafnyProgram.reporter);
break;
case DafnyOptions.CompilationTarget.JavaScript:
compiler = new Dafny.JavaScriptCompiler(dafnyProgram.reporter);
break;
case DafnyOptions.CompilationTarget.Go:
compiler = new Dafny.GoCompiler(dafnyProgram.reporter);
break;
case DafnyOptions.CompilationTarget.Java:
compiler = new Dafny.JavaCompiler(dafnyProgram.reporter);
break;
}
Method mainMethod;
var hasMain = compiler.HasMain(dafnyProgram, out mainMethod);
string targetProgramText;
var otherFiles = new Dictionary <string, string>();
{
var fileQueue = new Queue <FileTargetWriter>();
using (var wr = new TargetWriter(0)) {
compiler.Compile(dafnyProgram, wr);
var sw = new StringWriter();
wr.Collect(sw, fileQueue);
targetProgramText = sw.ToString();
}
while (fileQueue.Count > 0)
{
var wr = fileQueue.Dequeue();
var sw = new StringWriter();
wr.Collect(sw, fileQueue);
otherFiles.Add(wr.Filename, sw.ToString());
}
}
string baseName = Path.GetFileNameWithoutExtension(dafnyProgramName);
string callToMain = null;
if (hasMain)
{
using (var wr = new TargetWriter(0)) {
if (DafnyOptions.O.CompileTarget is DafnyOptions.CompilationTarget.Java)
{
dafnyProgramName = dafnyProgramName.Replace('-', '_');
wr.WriteLine($"public class {baseName.Replace('-', '_')} {{");
}
compiler.EmitCallToMain(mainMethod, wr);
if (DafnyOptions.O.CompileTarget is DafnyOptions.CompilationTarget.Java)
{
wr.WriteLine("}");
}
callToMain = wr.ToString(); // assume there aren't multiple files just to call main
}
}
bool completeProgram = dafnyProgram.reporter.Count(ErrorLevel.Error) == oldErrorCount;
// blurt out the code to a file, if requested, or if other files were specified for the C# command line.
string targetFilename = null;
if (DafnyOptions.O.SpillTargetCode > 0 || otherFileNames.Count > 0 || (invokeCompiler && !compiler.SupportsInMemoryCompilation))
{
var p = callToMain == null ? targetProgramText : targetProgramText + callToMain;
if (DafnyOptions.O.CompileTarget is DafnyOptions.CompilationTarget.Java && callToMain == null)
{
p = null;
}
targetFilename = WriteDafnyProgramToFiles(dafnyProgramName, p, completeProgram, otherFiles, outputWriter);
}
if (DafnyOptions.O.CompileTarget is DafnyOptions.CompilationTarget.Java)
{
string targetBaseDir = baseName;
string targetDir = Path.Combine(Path.GetDirectoryName(dafnyProgramName), targetBaseDir);
var assemblyLocation = System.Reflection.Assembly.GetExecutingAssembly().Location;
Contract.Assert(assemblyLocation != null);
var codebase = System.IO.Path.GetDirectoryName(assemblyLocation);
Contract.Assert(codebase != null);
string dest = targetDir + "/dafny";
Directory.CreateDirectory(dest);
var jcompiler = (JavaCompiler)compiler;
jcompiler.CompileTuples(dest);
jcompiler.CreateFunctionInterface(dest);
jcompiler.CompileDafnyArrays(dest);
jcompiler.CompileArrayInits(dest);
}
if (!completeProgram)
{
return(false);
}
// If we got until here, compilation to C# succeeded
if (!invokeCompiler)
{
return(true); // If we're not asked to invoke the C# to assembly compiler, we can report success
}
// compile the program into an assembly
object compilationResult;
var compiledCorrectly = compiler.CompileTargetProgram(dafnyProgramName, targetProgramText, callToMain, targetFilename, otherFileNames,
hasMain, hasMain && DafnyOptions.O.RunAfterCompile, outputWriter, out compilationResult);
if (compiledCorrectly && DafnyOptions.O.RunAfterCompile)
{
if (hasMain)
{
if (DafnyOptions.O.CompileVerbose)
{
outputWriter.WriteLine("Running...");
outputWriter.WriteLine();
}
compiledCorrectly = compiler.RunTargetProgram(dafnyProgramName, targetProgramText, callToMain, targetFilename, otherFileNames, compilationResult, outputWriter);
}
else
{
// make sure to give some feedback to the user
if (DafnyOptions.O.CompileVerbose)
{
outputWriter.WriteLine("Program compiled successfully");
}
}
}
return(compiledCorrectly);
}
protected override void EmitHeader(Program program, TargetWriter wr)
{
wr.WriteLine("// Dafny program {0} compiled into JavaScript", program.Name);
}
protected override void EmitAbsurd(TargetWriter wr)
{
wr.Indent();
wr.WriteLine("throw new Error('unexpected control point');");
}
protected override void EmitYield(TargetWriter wr)
{
wr.Indent();
wr.WriteLine("yield null;");
}
protected override void EmitJumpToTailCallStart(TargetWriter wr)
{
wr.Indent();
wr.WriteLine("continue TAIL_CALL_START;");
}
/// <inheritdoc />
public override void WriteLine()
{
TargetWriter.WriteLine();
}
protected override void EmitBreak(string label, TargetWriter wr)
{
wr.Indent();
wr.WriteLine("break {0};", label);
}
/// <inheritdoc />
public override void WriteLine(string value)
{
TargetWriter.WriteLine(value);
}
protected override void DeclareDatatype(DatatypeDecl dt, TargetWriter wr)
{
// $module.Dt = class Dt {
// constructor(tag) {
// this.$tag = tag;
// }
// static create_Ctor0(field0, field1, ...) {
// let $dt = new Dt(0);
// $dt.field0 = field0;
// $dt.field1 = field1;
// ...
// return $dt;
// }
// static create_Ctor1(...) {
// let $dt = new Dt(1);
// ...
// }
// ...
//
// get is_Ctor0 { return this.$tag == 0; }
// get is_Ctor1 { return this.$tag == 1; }
// ...
//
// toString() {
// ...
// }
// equals(other) {
// ...
// }
// }
// TODO: need Default member (also for co-datatypes)
// TODO: if HasFinitePossibleValues, need enumerator of values
string DtT = dt.CompileName;
string DtT_protected = IdProtect(DtT);
wr.Indent();
// from here on, write everything into the new block created here:
wr = wr.NewNamedBlock("$module.{0} = class {0}", DtT_protected);
wr.Indent();
wr.WriteLine("constructor(tag) { this.$tag = tag; }");
// query properties
var i = 0;
foreach (var ctor in dt.Ctors)
{
// collect the names of non-ghost arguments
var argNames = new List <string>();
var k = 0;
foreach (var formal in ctor.Formals)
{
if (!formal.IsGhost)
{
argNames.Add(FormalName(formal, k));
k++;
}
}
// static create_Ctor0(params) { return {$tag:0, p0: pararms0, p1: params1, ...}; }
wr.Indent();
wr.Write("static create_{0}(", ctor.CompileName);
wr.Write(Util.Comma(argNames, nm => nm));
var w = wr.NewBlock(")");
w.Indent();
w.WriteLine("let $dt = new {0}({1});", DtT_protected, i);
foreach (var arg in argNames)
{
w.Indent();
w.WriteLine("$dt.{0} = {0};", arg);
}
w.Indent();
w.WriteLine("return $dt;");
i++;
}
// query properties
i = 0;
foreach (var ctor in dt.Ctors)
{
// get is_Ctor0() { return _D is Dt_Ctor0; }
wr.Indent();
wr.WriteLine("get is_{0}() {{ return this.$tag === {1}; }}", ctor.CompileName, i);
i++;
}
if (dt is IndDatatypeDecl && !(dt is TupleTypeDecl))
{
// toString method
wr.Indent();
var w = wr.NewBlock("toString()");
i = 0;
foreach (var ctor in dt.Ctors)
{
var cw = EmitIf(string.Format("this.$tag == {0}", i), true, w);
cw.Indent();
cw.Write("return \"{0}.{1}\"", dt.Name, ctor.Name);
var sep = " + \"(\" + ";
var anyFormals = false;
var k = 0;
foreach (var arg in ctor.Formals)
{
if (!arg.IsGhost)
{
anyFormals = true;
cw.Write("{0}this.{1}.toString()", sep, FormalName(arg, k));
sep = " + \", \" + ";
k++;
}
}
if (anyFormals)
{
cw.Write(" + \")\"");
}
cw.WriteLine(";");
i++;
}
w = w.NewBlock("");
w.Indent();
w.WriteLine("return \"<unexpected>\";");
}
// equals method
wr.Indent();
using (var w = wr.NewBlock("equals(other)")) {
using (var thn = EmitIf("this === other", true, w)) {
EmitReturnExpr("true", thn);
}
i = 0;
foreach (var ctor in dt.Ctors)
{
var thn = EmitIf(string.Format("this.$tag == {0}", i), true, w);
using (var guard = new TargetWriter()) {
guard.Write("other.$tag == {0}", i);
var k = 0;
foreach (Formal arg in ctor.Formals)
{
if (!arg.IsGhost)
{
string nm = FormalName(arg, k);
if (IsDirectlyComparable(arg.Type))
{
guard.Write(" && this.{0} === oth.{0}", nm);
}
else
{
guard.Write(" && _dafny.areEqual(this.{0}, other.{0})", nm);
}
k++;
}
}
EmitReturnExpr(guard.ToString(), thn);
}
i++;
}
using (var els = w.NewBlock("")) {
els.Indent();
els.WriteLine("return false; // unexpected");
}
}
}
