public static CompilationResult Compile(CompilationJob compilationJob)
{
var results = new List <CompilationResult>();
// All variable declarations that we've encountered during this
// compilation job
var derivedVariableDeclarations = new List <Declaration>();
// All variable declarations that we've encountered, PLUS the
// ones we knew about before
var knownVariableDeclarations = new List <Declaration>();
if (compilationJob.VariableDeclarations != null)
{
knownVariableDeclarations.AddRange(compilationJob.VariableDeclarations);
}
// Get function declarations from the library, if provided
if (compilationJob.Library != null)
{
knownVariableDeclarations.AddRange(GetDeclarationsFromLibrary(compilationJob.Library));
}
var compiledTrees = new List <(string name, IParseTree tree)>();
// First pass: parse all files, generate their syntax trees,
// and figure out what variables they've declared
var stringTableManager = new StringTableManager();
foreach (var file in compilationJob.Files)
{
var tree = ParseSyntaxTree(file);
compiledTrees.Add((file.FileName, tree));
RegisterStrings(file.FileName, stringTableManager, tree);
}
if (compilationJob.CompilationType == CompilationJob.Type.StringsOnly)
{
// Stop at this point
return(new CompilationResult
{
Declarations = null,
ContainsImplicitStringTags = stringTableManager.ContainsImplicitStringTags,
Program = null,
StringTable = stringTableManager.StringTable,
});
}
var fileTags = new Dictionary <string, IEnumerable <string> >();
foreach (var parsedFile in compiledTrees)
{
GetDeclarations(parsedFile.name, parsedFile.tree, knownVariableDeclarations, out var newDeclarations, out var newFileTags);
derivedVariableDeclarations.AddRange(newDeclarations);
knownVariableDeclarations.AddRange(newDeclarations);
fileTags.Add(parsedFile.name, newFileTags);
}
foreach (var parsedFile in compiledTrees)
{
var checker = new TypeCheckVisitor(parsedFile.name, knownVariableDeclarations);
checker.Visit(parsedFile.tree);
derivedVariableDeclarations.AddRange(checker.NewDeclarations);
knownVariableDeclarations.AddRange(checker.NewDeclarations);
}
if (compilationJob.CompilationType == CompilationJob.Type.DeclarationsOnly)
{
// Stop at this point
return(new CompilationResult
{
Declarations = derivedVariableDeclarations,
ContainsImplicitStringTags = false,
Program = null,
StringTable = null,
FileTags = fileTags,
});
}
foreach (var parsedFile in compiledTrees)
{
CompilationResult compilationResult = GenerateCode(parsedFile.name, knownVariableDeclarations, compilationJob, parsedFile.tree, stringTableManager);
results.Add(compilationResult);
}
var finalResult = CompilationResult.CombineCompilationResults(results, stringTableManager);
// Last step: take every variable declaration we found in all
// of the inputs, and create an initial value registration for
// it.
foreach (var declaration in knownVariableDeclarations)
{
// We only care about variable declarations here
if (declaration.DeclarationType != Declaration.Type.Variable)
{
continue;
}
Operand value;
if (declaration.DeclarationType == Declaration.Type.Variable && declaration.defaultValue == null)
{
throw new NullReferenceException($"Variable declaration {declaration.name} ({declaration.ReturnType}) has a null default value. This is not allowed.");
}
switch (declaration.ReturnType)
{
case Yarn.Type.Number:
value = new Operand(Convert.ToSingle(declaration.DefaultValue));
break;
case Yarn.Type.String:
value = new Operand(Convert.ToString(declaration.DefaultValue));
break;
case Yarn.Type.Bool:
value = new Operand(Convert.ToBoolean(declaration.DefaultValue));
break;
default:
throw new ArgumentOutOfRangeException($"Cannot create an initial value for type {declaration.ReturnType}");
}
finalResult.Program.InitialValues.Add(declaration.Name, value);
}
finalResult.Declarations = derivedVariableDeclarations;
finalResult.FileTags = fileTags;
return(finalResult);
}