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Compile format strings at New instead of re-scanning them on every render

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lilleman
2026-08-27 23:09:35 +02:00
committed by lilleman-tw
parent 5282f37a59
commit ab9846c2ff
8 changed files with 202 additions and 46 deletions
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builtins.go
+30 -17
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@@ -32,28 +32,47 @@ var builtins = map[string]builtin{
"uuid": {arity: 0, call: func(s *session, _ string, _ map[string]node, _ []string) string { return uuidV7(s) }},
"ulid": {arity: 0, call: func(s *session, _ string, _ map[string]node, _ []string) string { return ulid(s) }},
"objectid": {arity: 0, call: func(s *session, _ string, _ map[string]node, _ []string) string { return randHex(s, 24) }},
"nanoid": {arity: 1, check: posIntArg, call: func(s *session, _ string, _ map[string]node, a []string) string { return nanoid(s, atoi(a[0])) }},
"hex": {arity: 1, check: posIntArg, call: func(s *session, _ string, _ map[string]node, a []string) string { return randHex(s, atoi(a[0])) }},
"base64": {arity: 1, check: posIntArg, call: func(s *session, _ string, _ map[string]node, a []string) string {
return base64.StdEncoding.EncodeToString(randBytes(s, atoi(a[0])))
"nanoid": {arity: 1, check: posIntArg, prep: func(a []string) callFn {
n := atoi(a[0])
return func(s *session, _ string, _ map[string]node) string { return nanoid(s, n) }
}},
"int": {arity: 2, check: intRangeArgs, call: func(s *session, _ string, _ map[string]node, a []string) string {
return strconv.Itoa(atoi(a[0]) + s.IntN(atoi(a[1])-atoi(a[0])+1))
"hex": {arity: 1, check: posIntArg, prep: func(a []string) callFn {
n := atoi(a[0])
return func(s *session, _ string, _ map[string]node) string { return randHex(s, n) }
}},
"float": {arity: 3, check: floatArgs, call: floatCall},
"iban": {arity: 1, check: ibanArg, call: func(s *session, _ string, _ map[string]node, a []string) string { return iban(s, a[0]) }},
"base64": {arity: 1, check: posIntArg, prep: func(a []string) callFn {
n := atoi(a[0])
return func(s *session, _ string, _ map[string]node) string {
return base64.StdEncoding.EncodeToString(randBytes(s, n))
}
}},
"int": {arity: 2, check: intRangeArgs, prep: func(a []string) callFn {
lo, span := atoi(a[0]), atoi(a[1])-atoi(a[0])+1
return func(s *session, _ string, _ map[string]node) string { return strconv.Itoa(lo + s.IntN(span)) }
}},
"float": {arity: 3, check: floatArgs, prep: func(a []string) callFn {
lo, _ := strconv.ParseFloat(a[0], 64)
hi, _ := strconv.ParseFloat(a[1], 64)
dp := atoi(a[2])
return func(s *session, _ string, _ map[string]node) string {
return strconv.FormatFloat(lo+s.Float64()*(hi-lo), 'f', dp, 64)
}
}},
"iban": {arity: 1, check: ibanArg, call: func(s *session, _ string, _ map[string]node, a []string) string { return iban(s, a[0]) }},
// calc is the one builtin that reads the sibling fields (to render its operands);
// every other ignores them. 1 or 2 args: the expression and an optional decimals.
"calc": {arity: -1, check: checkCalc, call: calcCall},
"calc": {arity: -1, check: checkCalc, prep: calcPrep},
// seq is the one stateful builtin: a per-session counter from 1, advancing on
// each call. An optional name selects an independent counter; no name uses the
// default one. Deterministic by construction, so a seeded faker stays stable.
"seq": {arity: -1, check: seqArg, call: func(s *session, _ string, _ map[string]node, a []string) string {
"seq": {arity: -1, check: seqArg, prep: func(a []string) callFn {
key := ""
if len(a) == 1 {
key = a[0]
}
return strconv.FormatUint(s.next(key), 10)
return func(s *session, _ string, _ map[string]node) string {
return strconv.FormatUint(s.next(key), 10)
}
}},
}
@@ -123,12 +142,6 @@ func floatArgs(_ map[string]node, a []string) error {
return nil
}
func floatCall(s *session, _ string, _ map[string]node, a []string) string {
lo, _ := strconv.ParseFloat(a[0], 64)
hi, _ := strconv.ParseFloat(a[1], 64)
return strconv.FormatFloat(lo+s.Float64()*(hi-lo), 'f', atoi(a[2]), 64)
}
func seqArg(_ map[string]node, a []string) error {
if len(a) > 1 {
return fmt.Errorf("seq takes at most one name, got %d args", len(a))