Function resolve_function_call

internal/cbm/lsp/php_lsp.c:1452–1514

/* ── call resolution ────────────────────────────────────────────── */

static void resolve_function_call(PHPLSPContext *ctx, TSNode call) {
    TSNode fn = ts_node_child_by_field_name(call, "function", 8);
    if (ts_node_is_null(fn))
        return;
    char *name = php_node_text(ctx, fn);
    if (!name)
        return;

    /* `use function Foo\\bar;` mapping. */
    const char *target = find_use(ctx, name, CBM_PHP_USE_FUNCTION);
    if (target) {
        const CBMRegisteredFunc *f = cbm_registry_lookup_func(ctx->registry, target);
        if (f) {
            emit_resolved(ctx, f->qualified_name, "php_function_namespaced", 0.95f);
            return;
        }
    }

    /* Current namespace, then global fallback. */
    if (ctx->current_namespace_qn && ctx->current_namespace_qn[0]) {
        const char *ns_qn = cbm_arena_sprintf(ctx->arena, "%s.%s", ctx->current_namespace_qn, name);
        const CBMRegisteredFunc *f = cbm_registry_lookup_func(ctx->registry, ns_qn);
        if (f) {
            emit_resolved(ctx, f->qualified_name, "php_function_namespaced", 0.95f);
            return;
        }
    }

    /* Look for any free function with this short_name. Prefer the one in the
     * file's project (i.e. with the longest module-prefix overlap). */
    const CBMRegisteredFunc *best = NULL;
    int best_score = -1;
    for (int i = 0; ctx->registry && i < ctx->registry->func_count; i++) {
        const CBMRegisteredFunc *cand = &ctx->registry->funcs[i];
        if (cand->receiver_type)
            continue;
        if (!cand->short_name || strcmp(cand->short_name, name) != 0)
            continue;
        int score = 0;
        if (cand->qualified_name && ctx->module_qn) {
            const char *m = ctx->module_qn;
            const char *q = cand->qualified_name;
            while (*m && *q && *m == *q) {
                if (*m == '.')
                    score++;
                m++;
                q++;
            }
        }
        if (score > best_score) {
            best_score = score;
            best = cand;
        }
    }
    if (best) {
        emit_resolved(ctx, best->qualified_name, "php_function_global_fallback", 0.70f);
        return;
    }