has_clause($name, %opts)

Define a clause. Used in type roles ("Data::Sah::Type::*"). Internally it adds a Moo "requires" for "clause_$name".

Options:

• v => int

  Specify clause specification version. Must be 2 (the current version).

• schema => sah::schema

  Define schema for clause value.

• prio => int {min=>0, max=>100, default=>50}

  Optional. Default is 50. The higher the priority (the lower the number), the earlier the clause will be processed.

• aliases => \@aliases OR $alias

  Define aliases. Optional.

• inspect_elem => bool

  If set to true, then this means clause inspect the element(s) of the data. This is only relevant for types that has elements (see HasElems role). An example of clause like this is "has" or "each_elem". When the value of "inspect_elem" is true, a compiler must prepare by coercing the elements of the data, if there are coercion rules applicable.

• subschema => coderef

  If set, then declare that the clause value contains a subschema. The coderef must provide a way to get the subschema from

• code => coderef

  Optional. Define implementation for the clause. The code will be installed as 'clause_$name'.

• into => str $package

  By default it is the caller package, but can be set to other package.

Example:

 has_clause minimum => (arg => 'int*', aliases => 'min');

has_clause_alias TARGET => ALIAS | [ALIAS1, ...]

Specify that clause named ALIAS is an alias for TARGET.

You have to define TARGET clause first (see has_clause above).

Example:

 has_clause max_length => ...;
 has_clause_alias max_length => "max_len";

has_func($name, %opts)

Define a Sah function. Used in function set roles ("Data::Sah::FuncSet::*"). Internally it adds a Moo "requires" for "func_$name".

Options:

• aliases => \@aliases OR $alias

  Optional. Declare aliases.

• code => $code

  Supply implementation for the function. The code will be installed as 'func_$name'.

• into => $package

  By default it is the caller package, but can be set to other package.

Example:

 has_func abs => (args => 'num');

has_func_alias TARGET => ALIAS | [ALIASES...]

Specify that function named ALIAS is an alias for TARGET.

You have to specify TARGET function first (see has_func above).

Example:

 has_func_alias 'atan' => 'arctan';