Parse bare values in nested arrays

[dduan]

Summary

• accept bare scalar tokens while recursively parsing nested arrays
• cover nested Boolean and special-float values with parameterized regression tests

Root cause

Recursive array parsing accepted only .string leaf tokens, while Boolean and special-float values are emitted as .bareKey tokens.

Validation

• swift test --filter TOMLDecoderTests.nestedBooleanAndSpecialFloatArraysParse
• swift test (751 tests)

Closes #330

[github-actions]

�[33mWarning: running with the Swift runtime interposer on Linux to avoid the Swift 6.3 runtime hook crash. See https://github.com/ordo-one/benchmark/issues/349�[0m

Comparing results between 'main' and 'pull_request'

Host 'runnervm5mmn9' with 4 'x86_64' processors with 15 GB memory, running:
#18~24.04.1-Ubuntu SMP Thu May 28 16:39:11 UTC 2026

TOMLDecoderBenchmarks

Decode toml.io example metrics

Time (wall clock): results within specified thresholds, fold down for details.

Time (wall clock) (μs) *	p0	p25	p50	p75	p90	p99	p100	Samples
main	48	50	51	54	57	65	114	10000
pull_request	48	50	51	55	57	66	209	10000
Δ	0	0	0	1	0	1	95	0
Improvement %	0	0	0	-2	0	-2	-83	0

Retains: results within specified thresholds, fold down for details.

Retains *	p0	p25	p50	p75	p90	p99	p100	Samples
main	765	765	765	765	765	765	765	10000
pull_request	765	765	765	765	765	765	765	10000
Δ	0	0	0	0	0	0	0	0
Improvement %	0	0	0	0	0	0	0	0

Parse toml.io example metrics

Time (wall clock): results within specified thresholds, fold down for details.

Time (wall clock) (ns) *	p0	p25	p50	p75	p90	p99	p100	Samples
main	3664	3819	3883	3945	4247	4703	66977	10000
pull_request	3709	3855	3929	4041	4351	4943	34346	10000
Δ	45	36	46	96	104	240	-32631	0
Improvement %	-1	-1	-1	-2	-2	-5	49	0

Retains: results within specified thresholds, fold down for details.

Retains *	p0	p25	p50	p75	p90	p99	p100	Samples
main	31	31	31	31	31	31	31	10000
pull_request	31	31	31	31	31	31	31	10000
Δ	0	0	0	0	0	0	0	0
Improvement %	0	0	0	0	0	0	0	0

decode canada.toml metrics

Time (wall clock): results within specified thresholds, fold down for details.

Time (wall clock) (ms) *	p0	p25	p50	p75	p90	p99	p100	Samples
main	195	196	197	203	207	207	207	6
pull_request	197	199	199	201	201	201	201	6
Δ	2	3	2	-2	-6	-6	-6	0
Improvement %	-1	-2	-1	1	3	3	3	0

Retains: results within specified thresholds, fold down for details.

Retains (K) *	p0	p25	p50	p75	p90	p99	p100	Samples
main	1286	1286	1286	1286	1286	1286	1286	6
pull_request	1286	1286	1286	1286	1286	1286	1286	6
Δ	0	0	0	0	0	0	0	0
Improvement %	0	0	0	0	0	0	0	0

decode twitter.toml metrics

Time (wall clock): results within specified thresholds, fold down for details.

Time (wall clock) (μs) *	p0	p25	p50	p75	p90	p99	p100	Samples
main	7779	8385	8495	8733	9175	9757	9833	116
pull_request	7810	8241	8405	8692	9060	9282	9311	117
Δ	31	-144	-90	-41	-115	-475	-522	1
Improvement %	0	2	1	0	1	5	5	1

Retains: results within specified thresholds, fold down for details.

Retains (K) *	p0	p25	p50	p75	p90	p99	p100	Samples
main	113	113	113	113	113	113	113	116
pull_request	113	113	113	113	113	113	113	117
Δ	0	0	0	0	0	0	0	1
Improvement %	0	0	0	0	0	0	0	1

parse GitHub events archive metrics

Time (wall clock): results within specified thresholds, fold down for details.

Time (wall clock) (ms) *	p0	p25	p50	p75	p90	p99	p100	Samples
main	107	108	109	111	113	119	119	10
pull_request	110	113	115	118	122	122	122	9
Δ	3	5	6	7	9	3	3	-1
Improvement %	-3	-5	-6	-6	-8	-3	-3	-1

Retains: results within specified thresholds, fold down for details.

Retains (K) *	p0	p25	p50	p75	p90	p99	p100	Samples
main	394	394	394	394	394	394	394	10
pull_request	394	394	394	394	394	394	394	9
Δ	0	0	0	0	0	0	0	-1
Improvement %	0	0	0	0	0	0	0	-1

parse canada.toml metrics

Time (wall clock): results within specified thresholds, fold down for details.

Time (wall clock) (ms) *	p0	p25	p50	p75	p90	p99	p100	Samples
main	14	14	14	14	14	19	19	72
pull_request	14	14	14	15	15	20	20	70
Δ	0	0	0	1	1	1	1	-2
Improvement %	0	0	0	-7	-7	-5	-5	-2

Retains: results within specified thresholds, fold down for details.

Retains *	p0	p25	p50	p75	p90	p99	p100	Samples
main	47	47	47	47	47	47	47	72
pull_request	47	47	47	47	47	47	47	70
Δ	0	0	0	0	0	0	0	-2
Improvement %	0	0	0	0	0	0	0	-2

parse twitter.toml metrics

Time (wall clock): results within specified thresholds, fold down for details.

Time (wall clock) (μs) *	p0	p25	p50	p75	p90	p99	p100	Samples
main	1837	1854	1866	1905	1930	2140	2752	520
pull_request	1856	1880	1922	1955	2103	2146	2718	506
Δ	19	26	56	50	173	6	-34	-14
Improvement %	-1	-1	-3	-3	-9	0	1	-14

Retains: results within specified thresholds, fold down for details.

Retains *	p0	p25	p50	p75	p90	p99	p100	Samples
main	7736	7736	7736	7736	7736	7736	7736	520
pull_request	7736	7736	7736	7736	7736	7736	7736	506
Δ	0	0	0	0	0	0	0	-14
Improvement %	0	0	0	0	0	0	0	-14