private static CodeMemberMethod CreateBinOpParseFunction(AphidBinaryOperatorExpressionRule rule)
{
var parseOperand = CreateParseOperand(rule);
var operandRef = CodeHelper.VarRef("operand");
var operandVar = CodeHelper.VarDecl(typeof(Expression), "operand", parseOperand);
var curTokenTypeRef = CodeHelper.PropRef("_currentToken").GetProperty("TokenType");
var tokenTypeRef = CodeHelper.TypeRefExp <AphidTokenType>();
var operatorRef = CodeHelper.VarRef("op");
var operatorVar = CodeHelper.VarDecl(typeof(AphidTokenType), "op", curTokenTypeRef);
var nextToken = CodeHelper.This().InvokeMethod("NextToken");
var condition = rule.Operators
.Select(x => tokenTypeRef.GetProperty(x))
.Select(x => CodeHelper.BinOpExp(curTokenTypeRef, CodeBinaryOperatorType.ValueEquality, x))
.BinOpExpJoin(CodeBinaryOperatorType.BooleanOr);
var assignStmt = CodeHelper.Assign(
operandRef,
CodeHelper.New(
typeof(BinaryOperatorExpression),
operandRef,
operatorRef,
parseOperand));
var whileStmt = CodeHelper.While(condition);
whileStmt.Statements.Add(operatorVar);
whileStmt.Statements.Add(nextToken);
whileStmt.Statements.Add(assignStmt);
var method = new CodeMemberMethod()
{
ReturnType = CodeHelper.TypeRef <Expression>(),
Name = "Parse" + rule.Name,
};
method.Statements.Add(operandVar);
method.Statements.Add(whileStmt);
method.Statements.Add(CodeHelper.Return(operandRef));
return(method);
}
private static CodeMemberMethod CreateBinOpParseFunction(AphidBinaryOperatorExpressionRule rule)
{
var parseOperand = CreateParseOperand(rule);
var operandRef = CodeHelper.VarRef("operand");
var operandVar = CodeHelper.VarDecl(typeof(AphidExpression), "operand", parseOperand);
var curTokenTypeRef = CodeHelper.PropRef("_currentToken").GetProperty("TokenType");
var tokenTypeRef = CodeHelper.TypeRefExp<AphidTokenType>();
var operatorRef = CodeHelper.VarRef("op");
var operatorVar = CodeHelper.VarDecl(typeof(AphidTokenType), "op", curTokenTypeRef);
var nextToken = CodeHelper.This().InvokeMethod("NextToken");
var condition = rule.Operators
.Select(x => tokenTypeRef.GetProperty(x))
.Select(x => CodeHelper.BinOpExp(curTokenTypeRef, CodeBinaryOperatorType.ValueEquality, x))
.BinOpExpJoin(CodeBinaryOperatorType.BooleanOr);
var assignStmt = CodeHelper.Assign(
operandRef,
CodeHelper.New(
typeof(BinaryOperatorExpression),
operandRef,
operatorRef,
parseOperand));
var whileStmt = CodeHelper.While(condition);
whileStmt.Statements.Add(operatorVar);
whileStmt.Statements.Add(nextToken);
whileStmt.Statements.Add(assignStmt);
var method = new CodeMemberMethod()
{
ReturnType = CodeHelper.TypeRef<AphidExpression>(),
Name = "Parse" + rule.Name,
};
method.Statements.Add(operandVar);
method.Statements.Add(whileStmt);
method.Statements.Add(CodeHelper.Return(operandRef));
return method;
}
private static CodeExpression CreateParseOperand(AphidBinaryOperatorExpressionRule rule)
{
return CodeHelper.This().InvokeMethod("Parse" + rule.Operand);
}
private static CodeExpression CreateParseOperand(AphidBinaryOperatorExpressionRule rule)
{
return(CodeHelper.This().InvokeMethod("Parse" + rule.Operand));
}
