Name the render's draws apart from the expansion hold: drawMemo, groupDraws, renderDraws

AGENTS.md

@@ -57,7 +57,7 @@ In [docs/decisions.md](docs/decisions.md):
 - A render shares one reference draw per category, per group
 - A draw group name is local to its category
 - The expansion hold and the render's draws are two fences
-- A hold set makes its draw maps on the first read
+- A render's draws make their maps on the first read
 - A category never references itself, and a record's fences run at load
 - A record's column set is fixed before the first draw
 - Null is a `null` item, not a rate

README.md

@@ -883,7 +883,7 @@ record.go       records: Record, the JSON/CSV/SQL serializers, and their entry p
 struct.go       structs: FakeStruct, fake tags, and a field's Go type as its column's datatype
 inline.go       inline templates: Template, NewTemplate, FakeTemplate, IsTemplate, and their compile and link
 format.go       the {token} grammar: scanning, tokens, operands, validation, compiling a format
-hold.go         the hold: one draw per held name; and the hold set and scope a render reads its reference paths through
+draws.go        the memo a hold or draw group keeps its draws in; and a render's draws and the scope it reads its reference paths through
 holdfence.go    the load fences over the hold: the routes and spellings that read one held name two ways
 drawfence.go    the load fences over reference draws: a drawGroup's, and a render's and a record's columns through the survey
 readsurvey.go   the load-time survey of what a render reads, and what a path reads of a table family, and its verdict on them; and the fence on a table reaching its own family

doc.go

@@ -19,15 +19,17 @@ package fejkdata
 //   - draw — one pick from a choice, or one row taken from a table: `pick`,
 //     `resolveChoice`, `table.drawRow`.
 //   - expansion — one render of one format: `expand`.
-//   - render — what owns one `holdSet`, and so what one reference draw spans:
+//   - render — what owns one `renderDraws`, and so what one reference draw spans:
 //     `Generator.Fake`, `FakeRecord`, `Template.Fake` and `RecordTemplate.Fake`
 //     start one each, `FakeStruct` one per record, and `expandAnew` one per
 //     iteration of a `template.repeat`.
-//   - hold — keeping one draw of a name, so every route to it reads that value:
-//     `formatOps.held`, `hold`, `groupHold`, `readHeld`.
-//   - draw group — reference draws held apart inside one render:
+//   - hold — one expansion keeping one draw of a name, so every route to it reads
+//     that value: `formatOps.held`, `formatOps.keepsHold`, `heldCheck`.
+//   - memo — what a hold or a draw group keeps its draws in, the variant drawn at
+//     each level and the value each path read: `drawMemo`, `readMemo`.
+//   - draw group — reference draws kept apart inside one render:
 //     `template.drawGroup` as the data spells it, `templateLink.drawGroupKey` as a
-//     render reads it, `holdSet`, `renderScope`.
+//     render reads it, `renderDraws`, `groupDraws`, `renderScope`.
 //   - pin — fixing which row of a table the render uses, which the draw fences replay:
 //     `pinSet`, `pinSet.pin`, `table.drawIn`.
 //   - family — a table and every table reaching it through a chain of

docs/decisions.md

@@ -242,11 +242,11 @@ groups. They pin different things — an operand pins the value its own render p
 and stops at a reference, a path pins every level it passes through — so one walk would
 carry both rules and both scopes anyway, and tell them apart at every step.
 
-## A hold set makes its draw maps on the first read
+## A render's draws make their maps on the first read
 
-Every render starts from an empty hold set, its draw groups included, since goal 2 prices
-a reader meeting two spellings of one empty set. Making the maps where the set is declared kept a
-record's on its frame's stack, but a `Fake`'s set lives on the `Generator`, so there it
+Every render starts from empty draws, its draw groups included, since goal 2 prices
+a reader meeting two spellings of one empty set. Making the maps where the draws are declared kept a
+record's on its frame's stack, but a `Fake`'s draws live on the `Generator`, so there it
 cost the cheapest render two heap allocations and 240→390 ns, measured 2026-09-28.
 Lazily, a render reading a reference path pays those two allocations, a record or struct
 included, and one reading none pays nothing; goal 11 holds either way.
@@ -304,7 +304,7 @@ writes as the load check proved it; a `Value any` would hand every caller a type
 
 ## A unit takes the stem of what it is, and a file the stem of the units it holds
 
-Goal 2 wants a name to reach one unit: `hold` is what a draw is kept in, `readValue` what
+Goal 2 wants a name to reach one unit: `drawMemo` is what a draw is kept in, `readValue` what
 a read drew.
 
 ## One name, one meaning

draws.go

@@ -2,18 +2,18 @@ package fejkdata
 
 import "strings"
 
-// hold is what one expansion has drawn for the names it holds: the variant each was drawn as, so
+// drawMemo is what a hold or a draw group has drawn: the variant each level was drawn as, so
 // every path under it reads one variant; and the value each read produced, by its path, so the
 // same read written twice reads one value.
-type hold struct {
+type drawMemo struct {
 	variant map[string]node
 	value   map[string]readValue
 }
 
-// groupHold is what one render's draw group has drawn for its reference paths: a hold, and the
+// groupDraws is what one render's draw group has drawn for its reference paths: a memo, and the
 // table rows those paths pinned.
-type groupHold struct {
-	hold
+type groupDraws struct {
+	memo drawMemo
 	pins pinSet
 }
 
@@ -26,20 +26,20 @@ type readValue struct {
 // renderTrace is a test's view of the fields a render reads; nil outside a test.
 type renderTrace func(group string, row renderedRow, a arm)
 
-// holdSet is one render's reference draws: the unnamed draw group's, and each named one's; and a
-// test's trace of its reads.
-type holdSet struct {
-	unnamed groupHold
-	named   map[string]*groupHold
+// renderDraws is one render's reference draws: the unnamed draw group's, and each named one's;
+// and a test's trace of its reads.
+type renderDraws struct {
+	unnamed groupDraws
+	named   map[string]*groupDraws
 	trace   renderTrace
 }
 
-// renderScope is where a render reads its reference paths: a hold set, in the draw group of the
+// renderScope is where a render reads its reference paths: its reference draws, in the draw group of the
 // template rendering; and row, the row of the table rendering, which its columns read. It passes
 // by value, and what is read from it reaches a map key, an interface or a func value only as a
-// copy; else sc, and with it every render's hold set, moves to the heap.
+// copy; else sc, and with it every render's draws, move to the heap.
 type renderScope struct {
-	set   *holdSet
+	draws *renderDraws
 	group string
 	row   renderedRow
 }
@@ -77,17 +77,17 @@ func (sc renderScope) rowOf(t *table) int {
 	return sc.row.index
 }
 
-func (sc renderScope) groupHold() *groupHold {
+func (sc renderScope) groupDraws() *groupDraws {
 	if sc.group == "" {
-		return &sc.set.unnamed
+		return &sc.draws.unnamed
 	}
-	d, drew := sc.set.named[sc.group]
+	d, drew := sc.draws.named[sc.group]
 	if !drew {
-		if sc.set.named == nil {
-			sc.set.named = map[string]*groupHold{}
+		if sc.draws.named == nil {
+			sc.draws.named = map[string]*groupDraws{}
 		}
-		d = &groupHold{}
-		sc.set.named[strings.Clone(sc.group)] = d
+		d = &groupDraws{}
+		sc.draws.named[strings.Clone(sc.group)] = d
 	}
 	return d
 }

format.go

@@ -386,7 +386,7 @@ type formatOps struct {
 	ops       []op
 	grow      int
 	held      map[string]firstReach
-	heldLocal bool // some held name is not a reference path, so expand makes a hold
+	keepsHold bool // some held name is not a reference path, so expand makes a hold
 }
 
 // firstReach is how a format first reaches a held name: the reader holding it, for
@@ -401,7 +401,7 @@ func (c *formatOps) holdName(a arm, label string) {
 		c.held = map[string]firstReach{}
 	}
 	if !isRef(a.head) || len(a.tail) == 0 {
-		c.heldLocal = true
+		c.keepsHold = true
 	}
 	h, seen := c.held[a.head]
 	if !seen {

hold_test.go

@@ -771,7 +771,7 @@ func TestReadFieldPanicsOnAPathItCannotHold(t *testing.T) {
 			t.Fatal("not a template")
 		}
 		mustPanic(t, name, func() {
-			readField(engine(1).rand, tm, nil, renderScope{set: &holdSet{}}, a)
+			readField(engine(1).rand, tm, nil, renderScope{draws: &renderDraws{}}, a)
 		})
 	}
 }

path.go

@@ -348,14 +348,14 @@ func (w *pathProbe) readRow(t *table, tail []string, r tableRoute) error {
 }
 
 // pathDraw draws the rows and variants a proved path reads, pinning the rows in pins; pins is nil
-// for a sibling path, which never crosses a table, since a table is only a category. For a held
-// read, held keeps the variant drawn at each level of a, so paths sharing a prefix share it.
+// for a sibling path, which never crosses a table, since a table is only a category. For a memoized
+// read, memo keeps the variant drawn at each level of a, so paths sharing a prefix share it.
 // Where pathCheck walks every variant of a choice, it walks the one drawn; at a table it selects
 // as pathCheck does and draws the row the route asks for.
 type pathDraw struct {
 	s    *generatorState
 	pins *pinSet
-	held *hold
+	memo *drawMemo
 	a    *arm
 }
 
@@ -400,20 +400,20 @@ func (w *pathDraw) walk(n node, tail []string) (node, error) {
 	return n, nil
 }
 
-// variant is the variant of c the walk continues into: the one held for this level
-// of the read, drawn once, where the walk holds its draws; else one drawn afresh.
+// variant is the variant of c the walk continues into: the one memo keeps for this level
+// of the read, drawn once, where the walk has a memo; else one drawn afresh.
 func (w *pathDraw) variant(c *choice, rest []string) node {
-	if w.held == nil {
+	if w.memo == nil {
 		return pick(w.s, c)
 	}
 	key := w.a.levels[len(w.a.tail)-len(rest)]
-	n, drew := w.held.variant[key]
+	n, drew := w.memo.variant[key]
 	if !drew {
 		n = resolveChoice(w.s, c)
-		if w.held.variant == nil {
-			w.held.variant = map[string]node{}
+		if w.memo.variant == nil {
+			w.memo.variant = map[string]node{}
 		}
-		w.held.variant[key] = n
+		w.memo.variant[key] = n
 	}
 	return n
 }

perf_test.go

@@ -55,7 +55,7 @@ func TestNoRenderAllocRegression(t *testing.T) {
 	}
 }
 
-// The repeat shape prices what keeps a hold set off the heap: a copy dropped costs an alloc an iteration.
+// The repeat shape prices what keeps a render's draws off the heap: a copy dropped costs an alloc an iteration.
 func TestNoReferenceAllocRegression(t *testing.T) {
 	word := `{"format":"{w}","w":["alpha","beta","gamma","delta"]}`
 	for _, s := range []struct {
@@ -73,12 +73,12 @@ func TestNoReferenceAllocRegression(t *testing.T) {
 			t.Fatalf("New(%s): %v", s.name, err)
 		}
 		if allocs := testing.AllocsPerRun(10000, func() { f.Fake("x") }); allocs > s.base*1.10 {
-			t.Errorf("%s: %.1f allocs/op regressed past %.1f (baseline %.1f + 10%%); a hold set reaching the heap is the usual cause", s.name, allocs, s.base*1.10, s.base)
+			t.Errorf("%s: %.1f allocs/op regressed past %.1f (baseline %.1f + 10%%); a render's draws reaching the heap is the usual cause", s.name, allocs, s.base*1.10, s.base)
 		}
 	}
 }
 
-// A table read pins a row in the render's hold and reads its cells in place.
+// A table read pins a row in the render's draws and reads its cells in place.
 func TestNoTableAllocRegression(t *testing.T) {
 	f, err := New(WithoutShippedData(), WithDataFS(fstest.MapFS{
 		"region.json": {Data: []byte(`{"format":"{name}","rows":"region.tsv","key":"code","weight":"population"}`)},

readsurvey_test.go

@@ -77,17 +77,17 @@ func spellPins(p *pinSet) string {
 }
 
 func renderRoot(s *generatorState, t *template, trace renderTrace) {
-	set := holdSet{trace: trace}
-	sc := renderScope{set: &set}
+	draws := renderDraws{trace: trace}
+	sc := renderScope{draws: &draws}
 	switch {
 	case t.site.row == formatRow:
 		tbl := t.site.table
 		render(s, tbl, sc)
 		for r := 0; r < tbl.rowCount(); r++ {
-			set := holdSet{trace: trace}
-			sc := renderScope{set: &set}
-			sc.groupHold().pins.pin(tbl, r)
-			render(s, tbl.rowNode, sc.at(tbl.rowNode, &sc.groupHold().pins))
+			draws := renderDraws{trace: trace}
+			sc := renderScope{draws: &draws}
+			sc.groupDraws().pins.pin(tbl, r)
+			render(s, tbl.rowNode, sc.at(tbl.rowNode, &sc.groupDraws().pins))
 		}
 	case t.repeat > 1:
 		expand(s, t, sc)
@@ -97,10 +97,10 @@ func renderRoot(s *generatorState, t *template, trace renderTrace) {
 }
 
 func renderRecordRoot(s *generatorState, t *template, columns []Column, trace renderTrace) {
-	set := holdSet{trace: trace}
-	sc := renderScope{set: &set}
+	draws := renderDraws{trace: trace}
+	sc := renderScope{draws: &draws}
 	if t.site.row == formatRow {
-		t.site.table.drawIn(s, &sc.groupHold().pins)
+		t.site.table.drawIn(s, &sc.groupDraws().pins)
 	}
 	renderRecord(s, t, columns, sc)
 }

record.go

@@ -130,8 +130,8 @@ func (f *Generator) FakeRecord(path string) (*Record, error) {
 	if err != nil {
 		return nil, fmt.Errorf("fejkdata: %s: %w", path, err)
 	}
-	var set holdSet
-	sc := renderScope{set: &set}
+	var draws renderDraws
+	sc := renderScope{draws: &draws}
 	if t, isTable := n.(*table); isTable {
 		if n, err = tableRecord(f.rand, t, tail, sc); err != nil {
 			return nil, fmt.Errorf("fejkdata: %s: %w", path, err)
@@ -159,7 +159,7 @@ func tableRecord(s *generatorState, t *table, tail []string, sc renderScope) (no
 	}
 	switch n := n.(type) {
 	case *table:
-		n.drawIn(s, &sc.groupHold().pins)
+		n.drawIn(s, &sc.groupDraws().pins)
 		return n, nil
 	case *tableRow:
 		return n.t, nil
@@ -204,8 +204,8 @@ type RecordTemplate struct {
 func (t *RecordTemplate) Fake() *Record {
 	t.g.mu.Lock()
 	defer t.g.mu.Unlock()
-	var set holdSet
-	return renderRecord(t.g.rand, t.template, t.columns, renderScope{set: &set})
+	var draws renderDraws
+	return renderRecord(t.g.rand, t.template, t.columns, renderScope{draws: &draws})
 }
 
 // NewRecordTemplate compiles an inline record — a JSON object with a format and
@@ -264,7 +264,7 @@ func recordOf(n node) (*template, []Column, error) {
 func renderRecord(s *generatorState, t *template, columns []Column, sc renderScope) *Record {
 	sc = sc.in(t)
 	if t.site.row == formatRow {
-		sc = sc.at(t.site.table.rowNode, &sc.groupHold().pins)
+		sc = sc.at(t.site.table.rowNode, &sc.groupDraws().pins)
 	}
 	r := &Record{columns: append([]Column(nil), columns...)}
 	for i := range r.columns {

render.go

@@ -6,7 +6,7 @@ import (
 )
 
 // rng is the randomness a builtin sample draws from; *rand.Rand satisfies it. The
-// render path takes the concrete *generatorState instead, which keeps the hold set of the walk
+// render path takes the concrete *generatorState instead, which keeps the draws of the walk
 // drawing through it off the heap.
 type rng interface {
 	IntN(n int) int
@@ -24,8 +24,8 @@ func (f *Generator) Fake(path string) (string, error) {
 	if err != nil {
 		return "", fmt.Errorf("fejkdata: %w", err)
 	}
-	var set holdSet
-	sc := renderScope{set: &set}
+	var draws renderDraws
+	sc := renderScope{draws: &draws}
 	n, err := descend(f.rand, &f.root, segments, sc)
 	if err != nil {
 		return "", fmt.Errorf("fejkdata: %s: %w", path, err)
@@ -33,7 +33,7 @@ func (f *Generator) Fake(path string) (string, error) {
 	if _, ok := n.(*folder); ok {
 		return "", fmt.Errorf("fejkdata: %s names a folder, not a value", path)
 	}
-	return render(f.rand, n, sc.at(n, &sc.groupHold().pins)), nil
+	return render(f.rand, n, sc.at(n, &sc.groupDraws().pins)), nil
 }
 
 // descend walks a caller's path to the node it names, pinning in sc the rows it
@@ -43,18 +43,18 @@ func descend(s *generatorState, root node, segments []string, sc renderScope) (n
 	if _, err := (&pathProbe{}).walk(root, segments); err != nil {
 		return nil, err
 	}
-	return drawPath(root, segments, "", &pathDraw{s: s, pins: &sc.groupHold().pins}), nil
+	return drawPath(root, segments, "", &pathDraw{s: s, pins: &sc.groupDraws().pins}), nil
 }
 
-// renderOnce renders n as one render, over a hold set of its own.
+// renderOnce renders n as one render, over draws of its own.
 func renderOnce(s *generatorState, n node) string {
-	var set holdSet
-	return render(s, n, renderScope{set: &set})
+	var draws renderDraws
+	return render(s, n, renderScope{draws: &draws})
 }
 
 // render evaluates a compiled node to a string. compile validates every node up
 // front, so rendering a compiled tree cannot fail. sc holds the reference draws the
-// render shares; each repeat iteration renders over a hold set of its own.
+// render shares; each repeat iteration renders over draws of its own.
 // A child this switch renders is one renderEdges must list too, or the fences miss it.
 func render(s *generatorState, n node, sc renderScope) string {
 	switch n := n.(type) {
@@ -96,12 +96,12 @@ func render(s *generatorState, n node, sc renderScope) string {
 }
 
 // expandAnew expands one repeat iteration of t as a render of its own, in no group. Inlined into
-// render's loop, its hold set would move to the heap.
+// render's loop, its draws would move to the heap.
 //
 //go:noinline
 func expandAnew(s *generatorState, t *template) string {
-	var set holdSet
-	return expand(s, t, renderScope{set: &set})
+	var draws renderDraws
+	return expand(s, t, renderScope{draws: &draws})
 }
 
 // pick selects one item. Uniform choices are O(1); weighted choices are an
@@ -119,10 +119,10 @@ func expand(s *generatorState, t *template, sc renderScope) string {
 	b.Grow(t.compiled.grow)
 	// One draw per held name, for this expansion only: a nested template and each
 	// repeat iteration get their own, since each is its own expansion. A reference
-	// path reads the render's hold in sc instead.
-	var held *hold
-	if t.compiled.heldLocal {
-		held = &hold{
+	// path reads its draw group's memo in sc instead.
+	var hold *drawMemo
+	if t.compiled.keepsHold {
+		hold = &drawMemo{
 			variant: make(map[string]node, len(t.compiled.held)),
 			value:   make(map[string]readValue, len(t.compiled.held)),
 		}
@@ -133,7 +133,7 @@ func expand(s *generatorState, t *template, sc renderScope) string {
 		case literalRun:
 			b.WriteString(o.lit)
 		case nameRead:
-			b.WriteString(readField(s, t, held, sc, o.arms[s.IntN(len(o.arms))]).text)
+			b.WriteString(readField(s, t, hold, sc, o.arms[s.IntN(len(o.arms))]).text)
 		case builtinCall:
 			// Read before the call, so the value a calc computes is the value the
 			// format showed. calcVars fixed the order op.operands holds.
@@ -141,7 +141,7 @@ func expand(s *generatorState, t *template, sc renderScope) string {
 			if len(o.operands) > 0 {
 				operands = make([]string, len(o.operands))
 				for j, a := range o.operands {
-					operands[j] = readField(s, t, held, sc, a).text
+					operands[j] = readField(s, t, hold, sc, a).text
 				}
 			}
 			b.WriteString(o.call(s, b.String(), operands)) // b.String() is the output so far
@@ -152,15 +152,15 @@ func expand(s *generatorState, t *template, sc renderScope) string {
 
 // readField renders one arm of a token. A name the expansion holds — a level some
 // token addresses by a dotted path that is not a reference, or a field an operand
-// reads — is drawn once and kept in held, so {place.postal-code} and {place.locality}
+// reads — is drawn once and kept in hold, so {place.postal-code} and {place.locality}
 // read one row, either read twice gives one value, and a shown operand is the operand
 // computed. Every other name is drawn afresh, so {word} {word} still draws twice.
-func readField(s *generatorState, t *template, held *hold, sc renderScope, a arm) readValue {
+func readField(s *generatorState, t *template, hold *drawMemo, sc renderScope, a arm) readValue {
 	if isRef(a.head) && len(a.tail) > 0 {
 		return readReference(s, t, sc, a)
 	}
-	if sc.set.trace != nil {
-		traceRead(sc.set.trace, t, sc, a)
+	if sc.draws.trace != nil {
+		traceRead(sc.draws.trace, t, sc, a)
 	}
 	if _, expansionHolds := t.compiled.held[a.head]; !expansionHolds {
 		if len(a.tail) > 0 {
@@ -168,35 +168,35 @@ func readField(s *generatorState, t *template, held *hold, sc renderScope, a arm
 		}
 		return readValue{text: render(s, t.head(a.head), sc)}
 	}
-	if held == nil {
+	if hold == nil {
 		panic(internalError("%q reads a name the expansion holds, with no hold to keep it in", a.spelling))
 	}
-	return readHeld(s, t, held, nil, sc, a)
+	return readMemo(s, t, hold, nil, sc, a)
 }
 
-// readReference reads a reference path, kept in the render's hold for its group, so its draw
+// readReference reads a reference path, kept in its draw group's memo, so its draw
 // spans the render.
 func readReference(s *generatorState, t *template, sc renderScope, a arm) readValue {
-	if sc.set.trace != nil {
-		traceRead(sc.set.trace, t, sc, a)
+	if sc.draws.trace != nil {
+		traceRead(sc.draws.trace, t, sc, a)
 	}
-	group := sc.groupHold()
-	return readHeld(s, t, &group.hold, &group.pins, sc, a)
+	group := sc.groupDraws()
+	return readMemo(s, t, &group.memo, &group.pins, sc, a)
 }
 
-func readHeld(s *generatorState, t *template, held *hold, pins *pinSet, sc renderScope, a arm) readValue {
-	if r, done := held.value[a.path]; done {
+func readMemo(s *generatorState, t *template, memo *drawMemo, pins *pinSet, sc renderScope, a arm) readValue {
+	if r, done := memo.value[a.path]; done {
 		return r
 	}
-	leaf := drawPath(t.head(a.head), a.tail, a.head, &pathDraw{s: s, held: held, pins: pins, a: &a})
+	leaf := drawPath(t.head(a.head), a.tail, a.head, &pathDraw{s: s, memo: memo, pins: pins, a: &a})
 	if pins != nil {
 		sc = sc.at(leaf, pins)
 	}
 	r := renderLeaf(s, leaf, sc)
-	if held.value == nil {
-		held.value = map[string]readValue{}
+	if memo.value == nil {
+		memo.value = map[string]readValue{}
 	}
-	held.value[a.path] = r
+	memo.value[a.path] = r
 	return r
 }
 

render_test.go

@@ -42,8 +42,8 @@ func TestGrowIsALowerBound(t *testing.T) {
 			t.Fatalf("format %q did not compile to a template", format)
 		}
 		for i := 0; i < 50; i++ {
-			var set holdSet
-			if got := len(expand(f.rand, tmpl, renderScope{set: &set})); got < tmpl.compiled.grow {
+			var draws renderDraws
+			if got := len(expand(f.rand, tmpl, renderScope{draws: &draws})); got < tmpl.compiled.grow {
 				t.Errorf("format %q: expand emitted %d bytes, below grow %d", format, got, tmpl.compiled.grow)
 			}
 		}
@@ -112,8 +112,8 @@ func TestNodeSwitchesHandleEveryKind(t *testing.T) {
 		"paths":       func(n node) { paths(n) },
 		"prove":       func(n node) { (&valueProof{}).prove(n) },
 		"render": func(n node) {
-			var set holdSet
-			render(engine(1).rand, n, renderScope{set: &set, row: renderedRow{tbl, 0}})
+			var draws renderDraws
+			render(engine(1).rand, n, renderScope{draws: &draws, row: renderedRow{tbl, 0}})
 		},
 		"renderEdges": func(n node) { renderEdges(n) },
 		"stepInto":    func(n node) { _, _ = stepInto(n, "x") },

struct.go

@@ -351,8 +351,8 @@ func (p *valueProof) checkField(label string, ft reflect.Type, column node) erro
 // fill draws the record into v's tagged fields, then each nested struct as a record of its own.
 func (s *structShape) fill(state *generatorState, v reflect.Value) {
 	if s.record != nil {
-		var set holdSet
-		for i, c := range renderRecord(state, s.record, s.columns, renderScope{set: &set}).columns {
+		var draws renderDraws
+		for i, c := range renderRecord(state, s.record, s.columns, renderScope{draws: &draws}).columns {
 			setColumn(fieldAt(v, s.fieldIndexes[i]), c)
 		}
 	}

todo.md

@@ -34,9 +34,6 @@ ranking `readSurvey.walk` and `edge` hardest and the unit they would least modif
 
 This round, in order:
 
-- Give the expansion hold and the render's group hold two names: `groupHold` embeds
-  `hold`, `held`, `heldLocal` and `holdSet` share its stem, and four seats could not
-  tell which fence guards which.
 - Word the three overlap refusals apart, `checkNameHeld`'s, `checkNoOverlap`'s and
   `overlapError`'s: three seats grepped one message to three fences.
 - Compile a format in `format.go`: `linkTemplate` calls `compileFormat` in `node.go`,