private static void LogTree(TokenTree tt, int indent)
{
string str = $"TTree ty:[{tt.root.type}] --- frag:[{tt.root.fragment}]";
if (string.IsNullOrEmpty(tt.keyword) == false)
{
str += $" - keyw : {tt.keyword}";
}
LogIndent(indent, str);
foreach (TokenTree ch in tt.nodes)
{
LogTree(ch, indent + 1);
}
}
// TODO: Perhaps this function should be moved into WASMBuild?
public SynNestingBuilder BuildFunction(SynFuncDecl fnd)
{
SynNestingBuilder builder = new SynNestingBuilder(null);
if (fnd.ast != null)
{
throw new SynthExceptionImpossible($"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);
}
public static void LogTree(TokenTree tt)
{
LogTree(tt, 0);
}