yamleam/scalar

Plain scalar resolution.

Converts the verbatim text of a plain (unquoted) scalar into a typed YamlNode according to YAML 1.2 resolution rules. Quoted scalars are always strings and bypass this layer entirely.

Resolution priority (first match wins):

Empty / “null” / “Null” / “NULL” / “~” → YamlNull
“true” / “True” / “TRUE” → YamlBool(True)
“false” / “False” / “FALSE” → YamlBool(False)
Decimal integer (optional sign) → YamlInt
Decimal float (optional sign, exponent) → YamlFloat
Otherwise → YamlString

classify sorts the text into these kinds and keeps a number’s text (ExactNumber); resolve_number turns that text into YamlInt or YamlFloat. resolve is the two together.

Following YAML 1.2, the YAML 1.1 boolean variants (“yes”, “no”, “on”, “off”) and leading-zero octals (“0777”) resolve as strings. Hex and octal integers (“0x1F”, “0o17”) and the special floats (“.inf”, “.nan”) currently resolve as strings too.

Values

classify

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pub fn classify(text: String) -> node.ExactNode

Sort a plain scalar into null, bool, number or string. A number keeps its text: it is an ExactNumber exactly when resolve would make it a YamlInt or a YamlFloat.

resolve

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pub fn resolve(text: String) -> node.YamlNode

resolve_number

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pub fn resolve_number(text: String) -> node.YamlNode

The YamlInt or YamlFloat for a number’s text, which classify accepted as an ExactNumber. Any other text is a YamlString.