Remove the legacy parallel type model's compiler-like surface. The
compiler pipeline resolves/lowers/lays out against canonical
src/ir/types.zig (TypeId/TypeTable); src/types.zig.Type is now strictly
editor-indexing + parse-time name metadata.
- src/types.zig: delete the type-resolution surface (widen, bitWidth,
isImplicitlyConvertibleTo) and every helper left dead once it was gone
(eql, isInt/isFloat/isSigned/isUnsigned, isTuple/isVector, and the
already-unused classification predicates isEnum/isUnion/isString/
isStringLike/isAny/optionalChild/sliceElementType/manyPointerElementType/
vectorElementType/isFunctionType/isClosureType/isCallable). Keep the Type
union plus the display/name-classification helpers sema/lsp/parser use
(fromName, fromTypeExpr, toName, displayName, isStruct/isOptional/isSlice/
isPointer/isManyPointer/isArray, pointerPointeeType). Seal the file with a
doc comment.
- src/sema.zig: inferExprType no longer calls Type.widen for arithmetic;
it approximates the display type as the left operand's (no second
resolver in the editor index).
- src/ir/type_bridge.zig: delete the dead bridgeType (legacy Type -> TypeId)
function + its sole sx_types import; resolveAstType and the AST->TypeId
path are untouched.
- src/ir/ir.zig: drop the bridgeType re-export.
- src/ir/type_bridge.test.zig: drop the two bridgeType tests (function gone).
Gate: zig build, zig build test (exit 0), tests/run_examples.sh 361/0,
zero examples/expected churn.
Architecture phase A1.2 — documentation/comment only, no behavior change.
Resolve the ambiguity over which type model compiler decisions trust:
- src/sema.zig: file-level module doc stating it is the editor symbol/type
index for the language server (navigation/completion), NOT a compiler
semantic pass. Its Type values are editor metadata; the compiler uses the
canonical TypeId/TypeTable model in src/ir/. sx requires no as-you-type type
checking -- authoritative diagnostics are produced on save by the canonical
pipeline. Added notes on SemaResult, Analyzer, resolveTypeNode, inferExprType.
No public API renamed (would churn LSP call sites).
- src/types.zig: note that Type is editor metadata only, not compiler truth;
do not expand for new compiler semantics (A8 deletes/reduces it).
- src/ir/types.zig: fix stale TypeTable.aliases comment -- it borrows
Lowering.program_index.type_alias_map (post-A1.1b).
Deleting the LSP's parallel sema diagnostic stream is A8.1, not this step.
Gate green: zig build, zig build test, bash tests/run_examples.sh (350 passed).
- types.Type: add dedicated `unresolved` variant (mirrors ir.TypeId.unresolved)
with eql/displayName arms; bridgeType maps it to TypeId.unresolved.
- sema.inferExprType + signature/field resolution: every Type.fromTypeExpr /
fromName / symbol lookup miss and call/field/index fallthrough now yields
Type.unresolved instead of a fabricated s(64). A variadic `..xs: []T` slice
element is taken from T, not a guessed "s32". Genuine literal defaults
(int=>s64, float=>f32, .len=>s64) kept.
- Builder.getRefType: an unlocatable ref (no active function / out-of-range)
returns .unresolved, not .s64 -- this is the accurate type source the pack
mono / binop / null-cmp fixes rely on, so it must not fabricate.
236 examples + unit tests (incl sema) green.
