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Siegfried Pammer
5e0cb39989
The fixture is the desired output for the C# 9 pattern forms the decompiler does not reconstruct yet: relational subpatterns printed with conventional spacing (currently emitted as 'I: >5', which the repo's own formatter rejects), 'and'/'or' combinators (type + value tests, constant alternatives, range checks in subpatterns), top-level 'is not' with designator, negated recursive patterns, 'null or ""', and switch statements/expressions with relational or combined arms (currently leaked as balanced-comparison if trees). It also pins two real bugs: a 'not' subpattern with a string constant decompiles to 'Text: 0' (uncompilable, CS0029 on recompile) and with a decimal constant to 'Dec: 0' (compiles but silently inverts and changes the matched value); the negation and the operand of the logic.not(call op_Equality) form are both dropped in ExpressionBuilder.TranslatePattern. The test is Assert.Ignore'd (#829); all six Roslyn 3.11/4.14/latest debug/opt configs compile the fixture and fail only at the output comparison. Assisted-by: Claude:claude-fable-5:Claude Code