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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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- Element sizes now flow as target-folded null-GEP sizeof constants
(TypeSystem::getSizeOfConstant); the module has no DataLayout string,
so host-side size math would diverge from the backend on padded structs.
- Extract the triplicated STRING null->"" select into
CodeGen::emitStringNullGuard.
- Scope ArrayTable per function via ArrayHandler::exchangeTable, mirroring
the Symbols save/clear/restore discipline.
- Promote checked element addressing to public
ArrayHandler::emitElementAddress for the upcoming lvalue layer.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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Integer/Real/Boolean/CharHandler carried only five one-line LLVM API
wrappers (now inlined at their call sites in CodeGen.cc) plus dead
emitDeclare methods that violated the documented two-table lock-step
invariant. StringHandler::emitDeclare (also dead) and its NamedValues
reference go too.
With the dead writers gone, NamedValues held no information not already
in Symbols[].Storage, so the parallel map is removed: getNamedValue
reads Symbols, ArrayHandler/FunctionGen take one table, and function
bodies save/restore a single map. Behavior unchanged.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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CodeGen declares its own MallocFunc in SetupExternalFunctions and uses
it for char->STRING coercion and INPUT STRING buffers, removing two bare
getFunction("malloc") calls that null-deref'd if no handler happened to
declare malloc first. The CHR branch reuses the char->STRING coercion
path instead of a second hand-rolled heap wrapper.
String concatenation moves from ArithmeticHandler (which re-declared
four externs per '&' and was the LLVM 19 build-pin root cause) to
StringHandler::emitConcat; ArithmeticHandler no longer touches the
Module. Dead FreeFunc declarations removed.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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- MID/RIGHT/LEFT integer args now coerced at call sites (RIGHT(s, n/2)
no longer emits invalid IR); drop emitLeft's private conversion
- FOR loop direction decided at run time via select on STEP sign;
descending FOR works, STEP evaluated once per iteration
- ArrayHandler: extract emitCheckedIndices/loadElement; index count is
validated before emission, fixing a compiler-crash (vector OOB UB) on
OUTPUT with too many indices
- Error contract: Lexer/Parser/CodeGen track errors; all silent failure
paths now print Error: diagnostics with line numbers; unterminated
char literal no longer truncates the rest of the program; module is
verified with verifyModule; driver exits non-zero on any error
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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