public static ForStatementNode Parse(AstTreeNode lastNode, ScriptToken scriptToken, List <ScriptToken> tokens)
{
if (tokens[1].Type != EScriptTokenType.L_PAREN)
{
Console.WriteLine("Syntax error: Missing ('");
return(null);
}
if (tokens[3].Type != EScriptTokenType.OF)
{
Console.WriteLine("Syntax error: Missing of");
return(null);
}
tokens.RemoveAt(0); // consume for
List <ScriptToken> loopDef = ScriptTree.GetEnclosedTokens(tokens);
ScriptToken variableName = loopDef[0];
loopDef.RemoveAt(0); // consume variable name
loopDef.RemoveAt(0); // consume of
AstTreeNode list = ScriptTree.ProcessTokens(loopDef);
AstTreeNode block = ScriptTree.ProcessTokens(ScriptTree.GetBlockTokens(tokens, EBlockType.BRACE, false)[0]);
return(new ForStatementNode(
new LiteralNode <string>(variableName.Value),
list,
block
));
}
public async Task TestGetEnclosedStatementTokens()
{
ScriptParser parser = new ScriptParser();
List <ScriptToken> tokens = parser.Tokenize("([1,2] + {1,2,3})");
List <ScriptToken> enclosedTokens = ScriptTree.GetEnclosedTokens(tokens);
Assert.Equal(EScriptTokenType.L_BRACKET, enclosedTokens[0].Type);
Assert.Equal(EScriptTokenType.R_BRACKET, enclosedTokens[4].Type);
Assert.Equal(EScriptTokenType.ADD, enclosedTokens[6].Type);
Assert.Equal(EScriptTokenType.L_BRACE, enclosedTokens[8].Type);
Assert.Equal(EScriptTokenType.R_BRACE, enclosedTokens[14].Type);
}
public static ArithmeticAssignmentNode Parse(AstTreeNode lastNode, ScriptToken scriptToken, List <ScriptToken> tokens)
{
if (lastNode == null || !(lastNode is IScopeMemberNode))
{
Console.WriteLine("Invalid assignment syntax.");
return(null);
}
tokens.RemoveAt(0); // consume +=
List <ScriptToken> assignmentTokens = ScriptTree.GetEnclosedTokens(tokens);
return(new ArithmeticAssignmentNode(
(IScopeMemberNode)Convert.ChangeType(lastNode, lastNode is RootScopeMemberNode ? typeof(RootScopeMemberNode) : typeof(ScopeMemberNode)),
ScriptTree.ProcessTokens(assignmentTokens),
scriptToken.Type
));
}
public static ArrayNode Parse(AstTreeNode lastNode, ScriptToken scriptToken, List <ScriptToken> tokens)
{
List <ScriptToken> values = ScriptTree.GetEnclosedTokens(tokens);
List <AstTreeNode> nodes = new List <AstTreeNode>();
for (int i = 0; i < values.Count; i++)
{
ScriptToken arg = values[i];
if (i % 2 == 0 && arg.Type != EScriptTokenType.COMMA)
{
nodes.Add(new IntegerLiteralNode(arg.Value));
}
else
{
Console.WriteLine("Syntax Error.");
}
}
return(new ArrayNode(nodes));
}
public static ComparisonNode Parse(AstTreeNode lastNode, ScriptToken scriptToken, List <ScriptToken> tokens)
{
tokens.RemoveAt(0); // Remove comparison operator
return(new ComparisonNode(lastNode, ScriptTree.ProcessTokens(ScriptTree.GetEnclosedTokens(tokens)), scriptToken.Type));
}