Diagnostics

The Meziantou.Framework.FixedStringBuilder.Generator package includes an analyzer that reports the declarations the generator cannot handle. No member is generated for a type with an error, so the errors that follow (a missing Length or conversion) disappear once the first one is fixed.

MFFSG0001: FixedStringBuilderAttribute requires one argument

The attribute has no argument, or more than one.

Fix: pass the capacity, and only the capacity: [FixedStringBuilderAttribute(128)].

MFFSG0002: FixedStringBuilderAttribute argument type is invalid

The argument is not an integer constant.

Fix: pass an int constant, a literal or a const field.

MFFSG0003: FixedStringBuilderAttribute length must be positive

The capacity is 0 or negative.

Fix: pass a capacity greater than 0.

MFFSG0004: FixedStringBuilderAttribute length is too large

The capacity is greater than 32,767, the maximum the generated types support.

Fix: pass a smaller capacity. For long texts, use a StringBuilder or a pooled buffer instead: a fixed string of that size is copied every time it is passed by value.

MFFSG0005: FixedStringBuilderAttribute requires a partial struct

The struct is not partial, so the generator cannot add its members.

Fix: add the partial modifier.

MFFSG0006: FixedStringBuilderAttribute does not support readonly or ref structs

The struct is readonly or a ref struct. The generated members change the value and implement interfaces, which these structs do not allow.

Fix: remove the readonly or ref modifier.