GitHub Actions Runner

src/Sdk/DTExpressions2/Expressions2/ParseException.cs

@@ -0,0 +1,68 @@
+using System;
+using System.ComponentModel;
+using GitHub.DistributedTask.Expressions2.Tokens;
+
+namespace GitHub.DistributedTask.Expressions2
+{
+    [EditorBrowsable(EditorBrowsableState.Never)]
+    public sealed class ParseException : ExpressionException
+    {
+        internal ParseException(ParseExceptionKind kind, Token token, String expression)
+            : base(secretMasker: null, message: String.Empty)
+        {
+            Expression = expression;
+            Kind = kind;
+            RawToken = token?.RawValue;
+            TokenIndex = token?.Index ?? 0;
+            String description;
+            switch (kind)
+            {
+                case ParseExceptionKind.ExceededMaxDepth:
+                    description = $"Exceeded max expression depth {ExpressionConstants.MaxDepth}";
+                    break;
+                case ParseExceptionKind.ExceededMaxLength:
+                    description = $"Exceeded max expression length {ExpressionConstants.MaxLength}";
+                    break;
+                case ParseExceptionKind.TooFewParameters:
+                    description = "Too few parameters supplied";
+                    break;
+                case ParseExceptionKind.TooManyParameters:
+                    description = "Too many parameters supplied";
+                    break;
+                case ParseExceptionKind.UnexpectedEndOfExpression:
+                    description = "Unexpected end of expression";
+                    break;
+                case ParseExceptionKind.UnexpectedSymbol:
+                    description = "Unexpected symbol";
+                    break;
+                case ParseExceptionKind.UnrecognizedFunction:
+                    description = "Unrecognized function";
+                    break;
+                case ParseExceptionKind.UnrecognizedNamedValue:
+                    description = "Unrecognized named-value";
+                    break;
+                default: // Should never reach here.
+                    throw new Exception($"Unexpected parse exception kind '{kind}'.");
+            }
+
+            if (token == null)
+            {
+                Message = description;
+            }
+            else
+            {
+                Message = $"{description}: '{RawToken}'. Located at position {TokenIndex + 1} within expression: {Expression}";
+            }
+        }
+
+        internal String Expression { get; }
+
+        internal ParseExceptionKind Kind { get; }
+
+        internal String RawToken { get; }
+
+        internal Int32 TokenIndex { get; }
+
+        public sealed override String Message { get; }
+    }
+}