Overloads that share a base QN (Java/C#/C++/Kotlin/Swift/Scala/ObjC) merge
into one graph node today, and that node collects the CALLS of every
overload. The agreed cure is one signature-qualified callable identity for
all overloading languages:
callable_qn := base_qn [<tparams>] (params) [cvref]
This change lands the plumbing with every language still at
CBM_CALLABLE_ID_NONE, so the graph is byte-identical; each language is
switched on later in its own change (with its index-format bump).
- internal/cbm/callable_sig.{c,h}: the per-language mode side table
(NONE|TYPED|LABELED_TYPED|LABELED|ARITY; kept out of CBMLangSpec like
cbm_string_dispatch_suffixes, since ~160 positional rows would otherwise
all need the member under -Wmissing-field-initializers), the shared
builder cbm_callable_sig[_mode] for the def and the call-scope QN, and
the inverse cbm_qn_callable_base_len[_named]. Suffix contract: no '.',
'::' or '->'; whitespace-normalized; comments/annotations/attributes
dropped; qualified types keep their last segment; '->' spelled '=>';
variadic '[]' (Java) / '~'; C++ top-level cv dropped, arrays decay,
cvref kept; <= 200 bytes, longer ones keep whole leading entries and end
in '#<fnv1a64 of the full suffix>)'. The builder is iterative (cursor
walk, bounded declarator loop) and self-checks against the inverse.
- The inverse is anchored to the node's bare name wherever the name is
known: real QNs already end in ')' without being callables (a Java field
whose name is its declarator `X = f()`, make `$(VAR)` targets), and only
the anchor makes the inverse exact on them.
- Leaf splitters strip a suffix first (no-op today): registry by-name key
(indexed by the bare name for a suffixed callable), cbm_lsp_bare_segment,
cbm_pipeline_qn_class_method_tail, pxc_last_component, pxc_qn_leaf,
go_index_visit_node, collect_prod_defs, sg_qn_prefix_len.
- New unused fields: CBMDefinition.qn_sig_off, CBMResolvedCall.callee_sig
(relocated by result compaction), CBMRegisteredFunc.sig, CBMLSPDef.sig.
The lsp_surface codec is unchanged (no format bump in this change).
- get_code_snippet and trace_path gain base-QN tiers
(cbm_store_find_nodes_by_qn_base) that find nothing until suffixes exist.
- store: cbm_store_find_nodes_by_qn_suffix built its LIKE pattern in a
512-byte buffer (a long suffix was truncated into a pattern that matched
nothing) and did not escape '_'/'%' (`my_func` also matched `myXfunc`).
The pattern is now heap-built, escaped, and matched with ESCAPE '\'.
Proof: full sorted node+edge+lsp_surface dumps are byte-identical before
and after on 7 corpora (this repo, elasticsearch libs, Exposed, dotnet
System.Linq, System.Collections, coreclr/gc, a C corpus).
Refs #2061
Signed-off-by: Martin Vogel <martin.vogel.tech@gmail.com>
Martin Vogel
11867dfa74