Parse explicit scalar-value tokens and join their characters without accepting surrogate code points.
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Explicit Unicode interpretation
Each token declares its base through U+, 0x, or decimal spelling. Mixed explicit formats are accepted because every token remains unambiguous.
Each token declares its base through U+, 0x, or decimal spelling. Mixed explicit formats are accepted because every token remains unambiguous.
Values above U+10FFFF and the surrogate range U+D800–U+DFFF fail instead of being replaced with U+FFFD.
Every operation rejects lone UTF-16 surrogates before processing. Inputs are capped at 256 KiB, report operations at 20,000 code points, and output at 1 MiB.
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