[matt-edmondson]

Fixes #164

Summary

ClassTemplate.WriteTo opened the body with using Scope scope = new(codeBlocker); and then wrote its members one at a time. When a member failed its own check, for example a property with no accessors, the Scope still wrote } as the exception unwound. The result was a class that parses cleanly but is silently missing three things:

• the failing member
• every member sorted after it
• every nested class

AddSourceFile and AddClasses did the same one level up.

Changes

• TemplateBase gets an internal virtual void Validate(), a no-op by default, matching the existing AccessorTemplate.Validate.
• PropertyTemplate and OperatorTemplate move their existing up-front checks into Validate(), and WriteTo still calls it first. The messages are unchanged and still name the member.
• ClassTemplate.Validate() checks its own kind, then calls Validate() on every member and every nested class, recursively. WriteTo calls it before writing anything.
• AddSourceFile validates every class before writing the file header. AddClasses validates every class before writing the first one.

Exception types are unchanged: InvalidOperationException for an invalid member or operator kind, and ArgumentOutOfRangeException for an unknown type kind.

The checks run before writing starts, so an exception thrown by a user BodyFactory while writing can still leave partial output. That is outside what this issue covers.

Tests

• Six new tests fail on main and pass with the fix (checked by reverting the library and running them again):
  • the issue's repro leaves the buffer empty, and the message names 'P'
  • a nested class with an invalid member leaves the outer class unwritten
  • a nested class of unknown kind leaves the outer class unwritten
  • an operator of unknown kind leaves its class unwritten
  • AddSourceFile with an invalid class writes nothing
  • AddClasses with an invalid class writes nothing
• One guard test checks that a class whose members are all valid still renders.
• Full suite: 256/256.

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Generated by Claude Code

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

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