1. ImplicitSelfField ARC: emit _ClassAddRef/_ClassRelease (or
_StringAddRef/_StringRelease) around storel when assigning to a
class- or string-typed implicit-Self field. Without this, the
TCodeGenQBE.FLines StringList was freed at Generate() exit, so
GetOutput returned garbage and stage-3 produced empty output.
2. UnescapeString: rewrite to handle both 'quoted' strings and #N
decimal char-code literals (the old version only handled
single-quoted forms, so #10 → empty string and GetText joined
all lines without newlines).
3. Chr builtin: add to symbol table, semantic pass, and codegen
(emits _Chr(w arg) → l result), required by the new UnescapeString.
4. AnalyseFieldAccess: set ResolvedMethod on parameterless constructor
TFieldAccessExpr nodes so the codegen can emit the Create body call
(companion to the EmitExpr IsConstructorCall fix from the previous
commit).
71b7fd5aae