private static void HandleNextOperator(
OperatorToken opToken,
List <ParsingUnit> units,
IEnumerator <Token> tokens,
CompilationContext context)
{
switch (opToken.operatorType)
{
case Operator.Assignment:
case Operator.PlusEquals:
case Operator.MinusEquals:
case Operator.TimesEquals:
case Operator.DivideEquals:
case Operator.PowerEquals:
case Operator.ModuloEquals:
case Operator.AndEquals:
case Operator.OrEquals:
case Operator.Plus:
case Operator.Minus:
case Operator.Times:
case Operator.Divide:
case Operator.Power:
case Operator.Modulo:
case Operator.CastDouble:
case Operator.CastInteger:
case Operator.Increment:
case Operator.Decrement:
case Operator.Not:
case Operator.IsEqualTo:
case Operator.IsNotEqualTo:
case Operator.IsGreaterThan:
case Operator.IsGreaterThanOrEqualTo:
case Operator.IsLessThan:
case Operator.IsLessThanOrEqualTo:
case Operator.And:
case Operator.Or:
case Operator.Negate:
//Add and continue
units.Add(new TokenUnit(opToken));
tokens.CautiousAdvance();
break;
case Operator.Ternary:
//Add the ternary Operator
units.Add(new TokenUnit(opToken));
tokens.CautiousAdvance();
//Add the first expected expression
Token firstToken = tokens.Current;
units.Add(new ParsedValuedUnit(
value: ParseNextExpression(tokens, context),
firstToken: firstToken));
//Colon
tokens.AssertAndSkip(Separator.Colon);
//Add the second expected expression
firstToken = tokens.Current;
units.Add(new ParsedValuedUnit(
value: ParseNextExpression(tokens, context),
firstToken: firstToken));
break;
case Operator.MemberAccess:
tokens.CautiousAdvance();
IdentifierToken nameToken = tokens.GetTokenAndAdvance <IdentifierToken>();
if (tokens.TestWithoutSkipping(Separator.OpenParen))
{
//Method
units.Add(new MemberAccessUnit(
identifier: nameToken.identifier,
args: ParseArguments(tokens, context),
firstToken: opToken));
}
else
{
//Value
units.Add(new MemberAccessUnit(
identifier: nameToken.identifier,
args: null,
firstToken: opToken));
}
break;
case Operator.AmbiguousMinus:
default:
throw new ArgumentException($"Unsupported Operator: {opToken.operatorType}");
}
}
private static void HandleNextKeyword(
KeywordToken keywordToken,
List <ParsingUnit> units,
IEnumerator <Token> tokens,
CompilationContext context)
{
switch (keywordToken.keyword)
{
case Keyword.New:
{
tokens.CautiousAdvance();
Type newObjectType = tokens.ReadType();
IValueGetter[] args = ParseArguments(tokens, context);
if (tokens.TestWithoutSkipping(Separator.OpenCurlyBoi))
{
Type itemType = newObjectType.GetInitializerItemType();
if (itemType == null)
{
throw new ScriptParsingException(
source: keywordToken,
message: $"Initializer Lists only function on collections. " +
$"Did you enter the wrong type, or possibly omit a semicolon at the end of the expression?");
}
//Initializer Syntax
IValueGetter[] items = ParseItems(tokens, itemType, context);
units.Add(new ParsedValuedUnit(
value: new ConstructInitializedCollectionExpression(
objectType: newObjectType,
args: args,
items: items,
source: keywordToken),
firstToken: keywordToken));
}
else
{
units.Add(new ParsedValuedUnit(
value: new ConstructObjectExpression(
objectType: newObjectType,
args: args),
firstToken: keywordToken));
}
}
break;
case Keyword.System:
case Keyword.User:
case Keyword.Math:
case Keyword.Debug:
{
tokens.CautiousAdvance();
tokens.AssertAndSkip(Operator.MemberAccess);
IdentifierToken identifierToken = tokens.GetTokenAndAdvance <IdentifierToken>();
if (tokens.TestWithoutSkipping(Operator.IsLessThan))
{
//Generic Method
Type[] internalTypes = tokens.ReadTypeArguments();
units.Add(new ParsedValuedUnit(
value: MemberManagement.HandleStaticGenericMethodExpression(
keywordToken: keywordToken,
args: ParseArguments(tokens, context),
identifier: identifierToken.identifier,
genericTypes: internalTypes),
firstToken: keywordToken));
}
else if (tokens.TestWithoutSkipping(Separator.OpenParen))
{
//Method
units.Add(new ParsedValuedUnit(
value: MemberManagement.HandleStaticMethodExpression(
keywordToken: keywordToken,
args: ParseArguments(tokens, context),
identifier: identifierToken.identifier),
firstToken: keywordToken));
}
else
{
//Member
units.Add(new ParsedValuedUnit(
value: MemberManagement.HandleStaticMemberExpression(
keywordToken: keywordToken,
identifier: identifierToken.identifier),
firstToken: keywordToken));
}
}
break;
default:
units.Add(new TokenUnit(tokens.Current));
tokens.CautiousAdvance();
break;
}
}
public void ParseNextGlobal(
IEnumerator <Token> scriptTokens,
ScriptCompilationContext context)
{
switch (scriptTokens.Current)
{
case KeywordToken kwToken:
//Valid operations:
// Global declaration
// Extern declaration
// Member declaration
// Class declaration
switch (kwToken.keyword)
{
case Keyword.Global:
case Keyword.Extern:
//Parse Global Declaration
{
scriptTokens.CautiousAdvance();
Type valueType = scriptTokens.ReadType();
IdentifierToken identToken = scriptTokens.GetTokenAndAdvance <IdentifierToken>();
IValueGetter initializerExpression = null;
if (scriptTokens.TestAndConditionallySkip(Operator.Assignment))
{
initializerExpression = Expression.ParseNextGetterExpression(scriptTokens, context);
}
scriptTokens.AssertAndSkip(Separator.Semicolon, false);
scriptDeclarations.Add(
new GlobalDeclaration(
identifierToken: identToken,
valueType: valueType,
isExtern: kwToken.keyword == Keyword.Extern,
initializer: initializerExpression,
context: context));
}
return;
case Keyword.Const:
{
scriptTokens.CautiousAdvance();
Type valueType = scriptTokens.ReadType();
IdentifierToken identToken = scriptTokens.GetTokenAndAdvance <IdentifierToken>();
scriptTokens.AssertAndSkip(Operator.Assignment);
IValueGetter initializerExpression = Expression.ParseNextGetterExpression(scriptTokens, context);
scriptTokens.AssertAndSkip(Separator.Semicolon, false);
if (!(initializerExpression is LiteralToken litToken))
{
throw new ScriptParsingException(
source: kwToken,
message: $"The value of Const declarations must be constant");
}
object value = litToken.GetAs <object>();
if (!valueType.IsAssignableFrom(litToken.GetValueType()))
{
value = Convert.ChangeType(value, valueType);
}
context.DeclareConstant(
identifierToken: identToken,
type: valueType,
value: value);
}
return;
case Keyword.Void:
case Keyword.Bool:
case Keyword.Double:
case Keyword.Integer:
case Keyword.String:
case Keyword.List:
case Keyword.Queue:
case Keyword.Stack:
case Keyword.DepletableBag:
case Keyword.DepletableList:
case Keyword.RingBuffer:
case Keyword.Dictionary:
case Keyword.HashSet:
case Keyword.Random:
case Keyword.DataFile:
//Parse Function or Member Declaration
{
Type valueType = scriptTokens.ReadType();
IdentifierToken identToken = scriptTokens.GetTokenAndAdvance <IdentifierToken>();
if (scriptTokens.TestWithoutSkipping(Separator.OpenParen))
{
VariableData[] arguments = ParseArgumentsDeclaration(scriptTokens);
if (scriptFunctions.ContainsKey(identToken.identifier))
{
throw new ScriptParsingException(
source: identToken,
message: $"Two declarations of function {identToken.identifier} found.");
}
scriptFunctions.Add(identToken.identifier,
new ScriptFunction(
functionTokens: scriptTokens,
functionSignature: new FunctionSignature(
identifierToken: identToken,
returnType: valueType,
arguments: arguments),
context: context));
}
else
{
//Member declaration
if (kwToken.keyword == Keyword.Void)
{
throw new ScriptParsingException(
source: kwToken,
message: $"Cannot declare a member of type Void");
}
IValueGetter initializerExpression = null;
if (scriptTokens.TestAndConditionallySkip(Operator.Assignment))
{
initializerExpression = Expression.ParseNextGetterExpression(scriptTokens, context);
}
scriptTokens.AssertAndSkip(Separator.Semicolon, false);
scriptDeclarations.Add(
new MemberDeclaration(
identifierToken: identToken,
valueType: valueType,
initializer: initializerExpression,
context: context));
}
}
return;
default:
throw new ScriptParsingException(
source: kwToken,
message: $"Token not valid for global context: {kwToken}.");
}
default:
throw new ScriptParsingException(
source: scriptTokens.Current,
message: $"Token not valid for global context: {scriptTokens.Current}.");
}
}