Core (CodecMapper)

Core Module

Namespace: CodecMapper
Assembly: CodecMapper.dll

Low-level byte reading and writing primitives shared by the JSON and XML runtimes.

Types and nested modules

Type/Module	Description
ByteSource (Module)	Functional helpers over `ByteSource`.
ByteSource (Type)	A lightweight context for reading bytes.
IByteWriter	Abstraction for writing bytes, to be implemented per target platform.
ResizableBuffer	Growable in-memory byte buffer used by the built-in codecs.

Functions and values

Function or value	Description
`isEmptyCollectionValue value` Full Usage: `isEmptyCollectionValue value` Parameters: value : `obj` Returns: `bool`	Field-policy wrappers sometimes need to distinguish explicit empty collections from non-empty ones without caring about the concrete type. value : `obj` Returns: `bool`
`parseByteInvariant typeName token` Full Usage: `parseByteInvariant typeName token` Parameters: typeName : `string` token : `string` Returns: `byte`	typeName : `string` token : `string` Returns: `byte`
`parseDateTimeOffsetRoundtripInvariant text` Full Usage: `parseDateTimeOffsetRoundtripInvariant text` Parameters: text : `string` Returns: `DateTimeOffset`	The package consumer path exercises the published Fable runtime rather than the local source build, so `DateTimeOffset` parsing needs the same fallback to avoid importing helpers that the package does not ship. text : `string` Returns: `DateTimeOffset`
`parseDateTimeRoundtripInvariant text` Full Usage: `parseDateTimeRoundtripInvariant text` Parameters: text : `string` Returns: `DateTime`	Fable's packaged `fable-library-js` surface does not currently expose the `ParseExact` helpers for date/time types, so the shared schemas need one portable entry point that preserves exact parsing on .NET and compatible parsing on Fable. text : `string` Returns: `DateTime`
`parseDecimalInvariant typeName token` Full Usage: `parseDecimalInvariant typeName token` Parameters: typeName : `string` token : `string` Returns: `decimal`	typeName : `string` token : `string` Returns: `decimal`
`parseDecimalInvariantBytes typeName data offset length` Full Usage: `parseDecimalInvariantBytes typeName data offset length` Parameters: typeName : `string` data : `byte[]` offset : `int` length : `int` Returns: `decimal`	Decimal parsing follows the same byte-level path so JSON numeric decode stays symmetric with the existing integer fast paths on .NET. typeName : `string` data : `byte[]` offset : `int` length : `int` Returns: `decimal`
`parseFloatInvariant typeName token` Full Usage: `parseFloatInvariant typeName token` Parameters: typeName : `string` token : `string` Returns: `float`	typeName : `string` token : `string` Returns: `float`
`parseFloatInvariantBytes typeName data offset length` Full Usage: `parseFloatInvariantBytes typeName data offset length` Parameters: typeName : `string` data : `byte[]` offset : `int` length : `int` Returns: `float`	The handwritten JSON parser already identifies numeric token bounds in the UTF-8 source, so the .NET fast path can parse directly from bytes and avoid allocating transient strings for every float and decimal. typeName : `string` data : `byte[]` offset : `int` length : `int` Returns: `float`
`parseInt16Invariant typeName token` Full Usage: `parseInt16Invariant typeName token` Parameters: typeName : `string` token : `string` Returns: `int16`	typeName : `string` token : `string` Returns: `int16`
`parseInt32Invariant typeName token` Full Usage: `parseInt32Invariant typeName token` Parameters: typeName : `string` token : `string` Returns: `int`	typeName : `string` token : `string` Returns: `int`
`parseInt32InvariantBytes typeName data offset length` Full Usage: `parseInt32InvariantBytes typeName data offset length` Parameters: typeName : `string` data : `byte[]` offset : `int` length : `int` Returns: `int`	typeName : `string` data : `byte[]` offset : `int` length : `int` Returns: `int`
`parseInt64Invariant typeName token` Full Usage: `parseInt64Invariant typeName token` Parameters: typeName : `string` token : `string` Returns: `int64`	typeName : `string` token : `string` Returns: `int64`
`parseInt64InvariantBytes typeName data offset length` Full Usage: `parseInt64InvariantBytes typeName data offset length` Parameters: typeName : `string` data : `byte[]` offset : `int` length : `int` Returns: `int64`	typeName : `string` data : `byte[]` offset : `int` length : `int` Returns: `int64`
`parseSByteInvariant typeName token` Full Usage: `parseSByteInvariant typeName token` Parameters: typeName : `string` token : `string` Returns: `sbyte`	typeName : `string` token : `string` Returns: `sbyte`
`parseTimeSpanConstantInvariant text` Full Usage: `parseTimeSpanConstantInvariant text` Parameters: text : `string` Returns: `TimeSpan`	`TimeSpan.ParseExact` hits the same missing-helper problem under Fable, while plain invariant parsing still accepts the canonical `"c"` payloads that the encoder emits. text : `string` Returns: `TimeSpan`
`parseUInt16Invariant typeName token` Full Usage: `parseUInt16Invariant typeName token` Parameters: typeName : `string` token : `string` Returns: `uint16`	typeName : `string` token : `string` Returns: `uint16`
`parseUInt32Invariant typeName token` Full Usage: `parseUInt32Invariant typeName token` Parameters: typeName : `string` token : `string` Returns: `uint32`	typeName : `string` token : `string` Returns: `uint32`
`parseUInt32InvariantBytes typeName data offset length` Full Usage: `parseUInt32InvariantBytes typeName data offset length` Parameters: typeName : `string` data : `byte[]` offset : `int` length : `int` Returns: `uint32`	typeName : `string` data : `byte[]` offset : `int` length : `int` Returns: `uint32`
`parseUInt64Invariant typeName token` Full Usage: `parseUInt64Invariant typeName token` Parameters: typeName : `string` token : `string` Returns: `uint64`	typeName : `string` token : `string` Returns: `uint64`
`parseUInt64InvariantBytes typeName data offset length` Full Usage: `parseUInt64InvariantBytes typeName data offset length` Parameters: typeName : `string` data : `byte[]` offset : `int` length : `int` Returns: `uint64`	typeName : `string` data : `byte[]` offset : `int` length : `int` Returns: `uint64`
`tryParseByteInvariant text` Full Usage: `tryParseByteInvariant text` Parameters: text : `string` Returns: `byte option`	text : `string` Returns: `byte option`
`tryParseDecimalInvariant` Full Usage: `tryParseDecimalInvariant` Returns: `string -> decimal option`	Returns: `string -> decimal option`
`tryParseFloatInvariant` Full Usage: `tryParseFloatInvariant` Returns: `string -> float option`	Returns: `string -> float option`
`tryParseInt16Invariant text` Full Usage: `tryParseInt16Invariant text` Parameters: text : `string` Returns: `int16 option`	text : `string` Returns: `int16 option`
`tryParseInt32Invariant text` Full Usage: `tryParseInt32Invariant text` Parameters: text : `string` Returns: `int option`	text : `string` Returns: `int option`
`tryParseInt64Invariant text` Full Usage: `tryParseInt64Invariant text` Parameters: text : `string` Returns: `int64 option`	text : `string` Returns: `int64 option`
`tryParseSByteInvariant text` Full Usage: `tryParseSByteInvariant text` Parameters: text : `string` Returns: `sbyte option`	text : `string` Returns: `sbyte option`
`tryParseUInt16Invariant text` Full Usage: `tryParseUInt16Invariant text` Parameters: text : `string` Returns: `uint16 option`	text : `string` Returns: `uint16 option`
`tryParseUInt32Invariant text` Full Usage: `tryParseUInt32Invariant text` Parameters: text : `string` Returns: `uint32 option`	text : `string` Returns: `uint32 option`
`tryParseUInt64Invariant text` Full Usage: `tryParseUInt64Invariant text` Parameters: text : `string` Returns: `uint64 option`	text : `string` Returns: `uint64 option`