Add comment blocks to indicate enum type

Author: morris25

deps/error_codes.jl

@@ -35,9 +35,9 @@ function generate_error_codes(io, html=error_code_html())
     id_names = Set{String}()
 
     class_enum_io = IOBuffer()
-    println(class_enum_io, "@cenum(\n    Class,")
+    println(class_enum_io, "@cenum(\n    # Enum type\n    Class,\n    # Enum values")
     error_enum_io = IOBuffer()
-    println(error_enum_io, "@cenum(\n    ErrorCode,")
+    println(error_enum_io, "@cenum(\n    # Enum type\n    ErrorCode,\n    # Enum values")
     alias_io = IOBuffer()
     error_names_io = IOBuffer()
     println(error_names_io, "const ERROR_NAMES = Dict(")

src/error_codes.jl

@@ -1,7 +1,9 @@
 # autogenerated by deps/error_codes.jl using https://www.postgresql.org/docs/current/errcodes-appendix.html
 
 @cenum(
+    # Enum type
     Class,
+    # Enum values
     C00,
     C01,
     C02,
@@ -49,7 +51,9 @@
 )
 
 @cenum(
+    # Enum type
     ErrorCode,
+    # Enum values
     E00000,
     E01000,
     E0100C,