module

YAML::Schema::Core

Provides utility methods for the YAML 1.1 core schema with the additional independent types specified in http://yaml.org/type/

Class methods

each(node : YAML::Nodes::Mapping, &)

Invokes the block for each of the given nodes keys and values, resolving merge keys (<<) when found (keys and values of the resolved merge mappings are yielded, recursively).

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parse(data : String | IO) : YAML::Any

Deserializes a YAML document.

Same as YAML.parse.

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parse_all(data : String | IO) : Array(YAML::Any)

Deserializes multiple YAML documents.

Same as YAML.parse_all.

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parse_int(node : Nodes::Node, type : T.class) : T forall T

Parses an integer of the given type according to the core schema.

type must be a primitive integer type. Raises YAML::ParseException if node is not a valid integer or its value is outside type's range.

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parse_null?(node : Nodes::Node)

Returns true if node parses to a null value.

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parse_null_or(node : YAML::Nodes::Node, &)

If node parses to a null value, returns nil, otherwise invokes the given block.

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Assuming the pull_parser is positioned in a scalar, parses it according to the core schema, taking the scalar's style and tag into account, then advances the pull parser.

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Parses a string according to the core schema, assuming the string had a plain style.

require "yaml"

YAML::Schema::Core.parse_scalar("hello") # => "hello"
YAML::Schema::Core.parse_scalar("1.2")   # => 1.2
YAML::Schema::Core.parse_scalar("false") # => false

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Parses a scalar value from the given node.

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reserved_string?(string) : Bool

Returns whether a string is reserved and must non be output with a plain style, according to the core schema.

require "yaml"

YAML::Schema::Core.reserved_string?("hello") # => false
YAML::Schema::Core.reserved_string?("1.2")   # => true
YAML::Schema::Core.reserved_string?("false") # => true

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