Esempio n. 1
0
        public override void BreakApartParsedTokens()
        {
            SynLog.Log($"Breaking apart type {this.typeName}.");
            SynLog.LogFragments(this.declarationTokens);

            // For struct structname { ... }, remove everything except the ...
            this.declarationTokens.RemoveRange(0, 3);

            int lastIdx = this.declarationTokens.Count - 1;

            if (this.declarationTokens[lastIdx].MatchesSymbol(";"))
            {
                this.declarationTokens.RemoveRange(lastIdx - 1, 2);
            }
            else
            {
                this.declarationTokens.RemoveRange(lastIdx, 1);
            }

            while (this.declarationTokens.Count > 0)
            {
                if (this.declarationTokens[0].MatchesSymbol(";") == true)
                {
                    this.declarationTokens.RemoveAt(0);
                    continue;
                }

                SynRegion rgn = SynRegion.Parse(this, this.declarationTokens);
                if (rgn != null)
                {
                    this.regions.Add(rgn.name, rgn);
                    continue;
                }

                SynFuncDecl fnParse =
                    SynFuncDecl.Parse(
                        this,
                        this.declarationTokens,
                        this.typeName,
                        false,
                        SynFuncDecl.ParseType.StructContext);

                if (fnParse != null)
                {
                    this.AddFunction(fnParse);
                    continue;
                }

                SynVarValue varParse = SynVarValue.ParseBodyVar(this.declarationTokens, SynVarValue.OuterScope.Struct);
                if (varParse != null)
                {
                    this.AddVariable(varParse);
                    continue;
                }
            }
        }
Esempio n. 2
0
        // TODO: Perhaps this function should be moved into WASMBuild?
        public SynNestingBuilder BuildFunction(SynFuncDecl fnd)
        {
            SynNestingBuilder builder = new SynNestingBuilder(null);

            if (fnd.ast != null)
            {
                throw new SynthExceptionImpossible($"Attempting to build function {fnd.functionName} AST multiple times.");
            }

            SynLog.Log($"Entered SynthFuncDecl.Build() for {fnd.functionName}.");

            // NOTE: For now functions are non-typed (in the SynthSyn language) and
            // are non addressable.
            fnd.ast =
                new AST(
                    fnd.declPhrase[0],
                    builder,
                    ASTOp.FunctionDecl,
                    fnd,
                    null,
                    false,
                    AST.DataManifest.NoData);

            SynLog.Log($"Building function AST for {fnd.functionName}.");
            SynLog.Log("");

            List <SynNestingBuilder> builders = new List <SynNestingBuilder>();

            builders.Add(builder);

            //List<TokenTree> treeLines = new List<TokenTree>();
            for (int i = 0; i < fnd.executingLines.Count; ++i)
            {
                List <Token> execLine = fnd.executingLines[i];
                SynLog.LogFragments(execLine);

                TokenTree rootLineNode = TokenTree.EatTokensIntoTree(execLine, fnd, true);

                SynLog.LogTree(rootLineNode);

                // If it's a member function (not a static function) then full in the struct
                // we belong to as a he invoking scope. Or else set it to null. Its syntax scope
                // it still all the way where the source code is, but doesn't have a "this" member
                // function.
                SynScope invokingScope = null;
                if (fnd.isStatic == false)
                {
                    invokingScope = fnd.GetStructScope();
                }

                AST exprAST = builder.ProcessFunctionExpression(builders, this, invokingScope, fnd, rootLineNode);
                if (exprAST == null)
                {
                    // We shouldn't have received null, we should have thrown before this
                    throw new SynthExceptionImpossible(""); //TODO:
                }
                fnd.ast.branches.Add(exprAST);
            }
            fnd.ast.branches.Add(new AST(new Token(), builder, ASTOp.EndScope, builder, null, false, AST.DataManifest.NoData));

            SynLog.Log("");
            SynLog.Log($"Encountered {builders.Count} nested scopes.");
            for (int i = 0; i < builders.Count; ++i)
            {
                SynLog.LogIndent(0, $"Scope {i}");
                SynLog.LogIndent(1, $"Line number : {builders[i].lineNumber}");
                SynLog.LogIndent(1, $"Stack Elements : Ele {builders[i].locStkEle.Count} - Vars {builders[i].locStkVars.Count}");
                SynLog.LogIndent(1, $"Memory Stack : Vars {builders[i].memStkVars.Count}");
                SynLog.LogIndent(1, $"Total Memory Stack : Bytes {builders[i].totalMemoryStackBytes}");
            }

            SynLog.Log("");
            SynLog.Log(fnd.ast.DumpDiagnostic());

            SynLog.Log($"Finished building AST : {fnd.functionName}.");
            SynLog.Log($"Converting AST to binary WASM : {fnd.functionName}.");

            // Before the AST is turned into actual WASM binary, we need to finalize the
            // byte alignment and the indices of local stack variables. This is done with
            // CompileAlignment, who's lower scopes should appear earlier in the builders
            // list before higher children scopes.
            for (int i = 0; i < builders.Count; ++i)
            {
                if (i == 0)
                {
                    builders[i].CompileAlignment(fnd);
                }
                else
                {
                    builders[i].CompileAlignment();
                }
            }

            // Gather all the local variables and declare them. This isn't as efficient as things
            // could be because after variables go out of scope, their positions on the stack
            // can be reused if they match types we encounter in the future, but that can be
            // handled later.

            // The program binary
            WASMByteBuilder fnBuild = new WASMByteBuilder();

            // Gather all the local variables
            List <WASM.Bin.TypeID> localVarTys = new List <WASM.Bin.TypeID>();

            foreach (SynNestingBuilder b in builders)
            {
                foreach (ValueRef stkVal in b.locStkEle)
                {
                    if (stkVal.varType.intrinsic == false)
                    {
                        throw new SynthExceptionCompile(""); // TODO: Error msg
                    }
                    switch (stkVal.varType.typeName)
                    {
                    case "bool":
                    case "int8":
                    case "uint8":
                    case "int16":
                    case "uint16":
                    case "int":
                    case "int32":
                        localVarTys.Add(WASM.Bin.TypeID.Int32);
                        break;

                    case "int64":
                    case "uint64":
                        localVarTys.Add(WASM.Bin.TypeID.Int64);
                        break;

                    case "float":
                        localVarTys.Add(WASM.Bin.TypeID.Float32);
                        break;

                    case "double":
                        localVarTys.Add(WASM.Bin.TypeID.Float64);
                        break;
                    }
                }
            }

            List <KeyValuePair <WASM.Bin.TypeID, int> > consolidatedLocalTys = new List <KeyValuePair <WASM.Bin.TypeID, int> >();

            for (int i = 0; i < localVarTys.Count; ++i)
            {
                WASM.Bin.TypeID tyid = localVarTys[i];
                int             ct   = 1;
                ++i;

                for (; i < localVarTys.Count; ++i)
                {
                    if (localVarTys[i] != tyid)
                    {
                        break;
                    }

                    ++ct;
                }
                consolidatedLocalTys.Add(new KeyValuePair <WASM.Bin.TypeID, int>(tyid, ct));
            }

            fnBuild.AddLEB128((uint)consolidatedLocalTys.Count); // Local decl
            for (int i = 0; i < consolidatedLocalTys.Count; ++i)
            {
                fnBuild.AddLEB128((uint)consolidatedLocalTys[i].Value);

                // These are really bytes, but they'll end up being added as bytes since they're
                // small constants
                fnBuild.AddLEB128((uint)consolidatedLocalTys[i].Key);
            }

            builder.BuildBSFunction(fnd, fnd.ast, this, builder, fnBuild);
            fnBuild.Add_End();
            fnd.fnBin = fnBuild.Bin();

            SynLog.Log($"Exiting SynthFuncDecl.Build({fnd.functionName}).");
            return(builder);
        }