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Add TRY/CATCH/ENDTRY and anonymous THROW statements. Use LLVM exception
handling and the C++ ABI to propagate exceptions across function calls,
clean up catch state, and handle uncaught exceptions at the program boundary.
Register exception runtime symbols for the statically linked embedded runner.
Verify runtime checks, nested catches, returns, loops, and invalid syntax
with smoke programs; exercise unwinding with MCJIT, lli, and native binaries.
BREAKING CHANGE: Runtime check failures now throw anonymous exceptions and
print only a generic message when uncaught. Native binaries require linking
the C++ runtime.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
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- Parameter syntax lands end-to-end: ARRAY OF T (rank 1, bounds travel
with the argument) and ARRAY[l:u,...] OF T (any rank, literal bounds as
a checked contract). Element type and rank must match exactly.
- Flattened ABI: each rank-R array parameter becomes a data pointer plus
kBoundArgsPerDim i64 bounds per dimension. The callee rebuilds
ArrayMetadata from those bounds (ArrayHandler::bindArrayParameter via a
binder callback injected by CodeGen, so FunctionGen stays ignorant of
the array subsystem); the checked-indexing pipeline is reused unchanged.
- BYVAL (the CIE default) copies the whole buffer at callee entry
(malloc+memcpy, never freed — consistent with the string policy) so
callee writes stay invisible; BYREF binds the caller's buffer.
- Bounded-parameter contract: compile-time comparison when the caller's
bounds are constants, else a runtime [Fatal] check
(RuntimeCheck::emitArrayArgBoundsCheck).
- marshalCallArgs gains the array branch and a call-site line number
(CallStmtAST now carries one); whole-array-to-scalar keeps a clear
error, FUNCTION RETURNS ARRAY is a dedicated parse error.
- Verified: BYREF fill/sort-style mutation, BYVAL copy invisibility,
2-D bounded params, ARRAY OF <record> with field writes through the
parameter, bounds-contract mismatches at compile time and run time.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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- Reserve TYPE/ENDTYPE/SET/DEFINE (-600 token block); SET/DEFINE parse to
dedicated not-implemented errors (RANDOM precedent).
- New TypeAST.h: enum/pointer/record decl nodes, designator chain
(DesignatorExprAST + Index/Field/Deref accessors), AddrOfExprAST,
DesignatorAssignStmtAST. Bare-name and single-index shapes degrade to
their legacy nodes, so existing programs produce identical ASTs.
- ParserType.cc: TYPE declarations (top-level only, enforced via a
ParseBlock depth counter), DECLARE-only record bodies with local
field-level error recovery.
- Postfix [ ] . ^ chain in ParseIdentifierExpr; prefix ^ (address-of,
designator operand only) in ParseUnary; assignment targets rebuilt on
the same suffix parser.
- Parameters: ParamDecl{name, type, mode, array rank/bounds} replaces the
(name, type, byref) tuple. Pass mode is sticky across parameters and
BYREF is rejected in FUNCTIONs, both per guide §8.3 (the old per-param
reset made the guide's own SWAP example pass Y by value). ARRAY OF T /
ARRAY[l:u,...] OF T parameter syntax parses; codegen rejects it until
the parameter-passing phase lands.
- CodeGen stubs report clear not-implemented errors for the new nodes so
nothing is silently ignored.
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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emitPrototype now records each FUNCTION/PROCEDURE's pseudocode signature
(FuncSig: return type + per-param type/BYREF flag). CodeGen::
marshalCallArgs replaces the two verbatim-duplicated marshalling blocks
and dispatches on the declared signature instead of inferring BYREF from
pointer-typed LLVM params: BYVAL STRING params now receive the string
data pointer (no more runtime garbage), and BYVAL args are coerced to
the declared type (INTEGER->REAL args no longer emit invalid IR).
Top-level prototypes are pre-registered in compile(), so calls may
precede definitions; GenerateCall no longer fabricates i64 externs for
unknown names - an unregistered callee is a compile error. OUTPUT
reports an error when it cannot infer the expression type instead of
printing with the INTEGER format.
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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