`std/yaml/schema`

std/yaml/src/schema.trb

What a scalar is: the schemas of the specification, which say what a plain scalar without a tag resolves to, and the readers of the texts every schema shares - null, truth values, whole numbers, floating point numbers, base64.

A typed decode does not need a schema: the field's type says what it wants, and the text is read as that. The schema is for a document read without a type.

type YamlSchema

type YamlSchema

How a plain scalar without a tag is read where no type says what it is.

Examples

use Yaml from "std/yaml"

const yaml = Yaml schema: Some(YamlSchema.Json)
print yaml.value("[1, true, null]")

case Failsafe

case Failsafe

Every scalar is a text.

case Json

case Json

null, true, false and JSON's numbers; any other plain scalar is an error.

case Core

case Core

YAML 1.2's schema, and the default: null, Null, NULL, ~ and the empty scalar are null, true and false in three spellings are truth values, decimal, 0o octal and 0x hexadecimal whole numbers, floating point numbers with .inf and .nan, and everything else is a text.

case Yaml11

case Yaml11

YAML 1.1's types, for a document that says %YAML 1.1: yes, no, on, off, y and n are truth values too, 0b binary and 0 octal numbers and _ between digits, base 60 (1:30:00), and timestamps, which stay texts.