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- TypeSystem: TypeKinds Enum/Record/Pointer with per-kind payloads and
checked accessors; two-pass registration (names first, then definitions
in source order) so pointer TYPEs may forward-reference; enum-constant
table owned by TypeSystem so constants stay visible inside function
bodies across the Symbols save/clear/restore. Dead surface removed
(Custom kind, Printable/Builtin/ReferenceLike, ElementSize, hasType,
CodeGen::getNamedValue/getLLVMType).
- Enums are i64 with 0-based ordinals (constexpr kEnumOrdinalBase); all
type identity is by NAME. New emitCoercedExpr is the single admission
gate, replacing raw coercion at assignments, array stores, BYVAL args,
RETURN, IF/WHILE/REPEAT/FOR operands, file operands and builtin args;
coerceValueToType now hard-errors if a user-kind target reaches it.
- Binary ops with user-kind operands are intercepted ahead of
ArithmeticHandler ('&'-intercept precedent): same-enum comparisons,
enum +/- INTEGER (with a runtime range check, [Fatal] on overflow, the
only site that can manufacture an invalid ordinal), same-name pointer
=/<>; everything else is a compile error naming the operator.
- OUTPUT is an exhaustive switch over TypeKind (enum prints its ordinal;
record/pointer are compile errors, also covering whole-array OUTPUT);
INPUT's silent %lld fallback for unknown kinds is now an explicit error.
- Enum value names are globally reserved: collisions with DECLARE,
array names, parameters and function names are compile errors.
- RuntimeCheck: emitEnumRangeCheck + emitNullDerefCheck (used by the
pointer phase) following the emitIndexCheck recipe.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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(OPENFILE/READFILE/WRITEFILE/CLOSEFILE/EOF)
Front end: OPENFILE/READFILE/WRITEFILE/CLOSEFILE plus reserved mode
keywords READ/WRITE/APPEND (RANDOM reserved with a dedicated
not-implemented error); statement nodes in new FileAST.h, parsing in new
ParserFile.cc; EOF joins the Builtins table as the 12th builtin and
CallExprAST now carries a line number for its runtime diagnostics.
Runtime: new FileHandler (StringHandler-shaped leaf) lazily synthesizes
internal __cps_file_* helper functions and a 16-slot open-file table
keyed by filename content (strcmp — STRING '=' is pointer identity).
EOF is an fgetc/ungetc peek; READFILE grows a malloc/realloc line buffer
and strips a trailing CR; fopen uses text modes so mingw-w64 line
translation works. File-free programs get byte-identical IR. All misuse
(not open, wrong mode, reopen, fopen failure, read past EOF, table full)
dies with the existing "[Fatal] line N:" pattern via a new
RuntimeCheck::emitErrorAndExit overload taking runtime printf args.
Also fixes a pre-existing ArithmeticHandler hole surfaced by adversarial
review: mixed-width integer operands (i1 BOOLEAN / i8 CHAR vs i64) now
widen via ZExt instead of emitting invalid IR, and remaining type
mismatches get a clean diagnostic; -EOF(f) and -IS_NUM(x) compile.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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