Class: TRuby::ConstraintChecker

Inherits:
Object
  • Object
show all
Defined in:
lib/t_ruby/constraint_checker.rb

Overview

Main constraint checker class

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ ConstraintChecker

Returns a new instance of ConstraintChecker.



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# File 'lib/t_ruby/constraint_checker.rb', line 187

def initialize
  @constraints = {}
  @errors = []
end

Instance Attribute Details

#constraints ⇒ Object (readonly)

Returns the value of attribute constraints.



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# File 'lib/t_ruby/constraint_checker.rb', line 185

def constraints
  @constraints
end

#errors ⇒ Object (readonly)

Returns the value of attribute errors.



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# File 'lib/t_ruby/constraint_checker.rb', line 185

def errors
  @errors
end

Instance Method Details

#generate_validation_code(type_name, var_name) ⇒ Object

Generate validation code for runtime checking



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# File 'lib/t_ruby/constraint_checker.rb', line 269

def generate_validation_code(type_name, var_name)
  return nil unless @constraints.key?(type_name)

  type_info = @constraints[type_name]
  conditions = []

  # Base type check
  case type_info[:base_type]
  when "Integer"
    conditions << "#{var_name}.is_a?(Integer)"
  when "String"
    conditions << "#{var_name}.is_a?(String)"
  when "Float"
    conditions << "#{var_name}.is_a?(Float)"
  when "Numeric"
    conditions << "#{var_name}.is_a?(Numeric)"
  when "Array"
    conditions << "#{var_name}.is_a?(Array)"
  end

  # Constraint checks
  type_info[:constraints].each do |constraint|
    if constraint.respond_to?(:validation_code)
      code = constraint.validation_code(var_name)
      conditions << code unless code.empty?
    end
  end

  conditions.join(" && ")
end

#parse_constraint(definition) ⇒ Object

Parse constraint syntax from source



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# File 'lib/t_ruby/constraint_checker.rb', line 201

def parse_constraint(definition)
  # Match: type Name <: BaseType where condition
  if definition.match?(/^(\w+)\s*<:\s*(\w+)\s*where\s*(.+)$/)
    match = definition.match(/^(\w+)\s*<:\s*(\w+)\s*where\s*(.+)$/)
    name = match[1]
    base_type = match[2]
    condition = match[3].strip

    constraints = parse_condition(base_type, condition)
    return { name: name, base_type: base_type, constraints: constraints }
  end

  # Match: type Name <: BaseType (bounds only)
  if definition.match?(/^(\w+)\s*<:\s*(\w+)\s*$/)
    match = definition.match(/^(\w+)\s*<:\s*(\w+)\s*$/)
    name = match[1]
    base_type = match[2]

    return {
      name: name,
      base_type: base_type,
      constraints: [BoundsConstraint.new(subtype: name, supertype: base_type)],
    }
  end

  # Match: type Name = BaseType where condition
  if definition.match?(/^(\w+)\s*=\s*(\w+)\s*where\s*(.+)$/)
    match = definition.match(/^(\w+)\s*=\s*(\w+)\s*where\s*(.+)$/)
    name = match[1]
    base_type = match[2]
    condition = match[3].strip

    constraints = parse_condition(base_type, condition)
    return { name: name, base_type: base_type, constraints: constraints }
  end

  nil
end

#register(name, base_type:, constraints: []) ⇒ Object

Register a constrained type



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# File 'lib/t_ruby/constraint_checker.rb', line 193

def register(name, base_type:, constraints: [])
  @constraints[name] = {
    base_type: base_type,
    constraints: constraints,
  }
end

#validate(type_name, value) ⇒ Object

Validate a value against a constrained type



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# File 'lib/t_ruby/constraint_checker.rb', line 241

def validate(type_name, value)
  @errors = []

  unless @constraints.key?(type_name)
    @errors << "Unknown constrained type: #{type_name}"
    return false
  end

  type_info = @constraints[type_name]

  # Check base type
  unless matches_base_type?(value, type_info[:base_type])
    @errors << "Value #{value.inspect} does not match base type #{type_info[:base_type]}"
    return false
  end

  # Check all constraints
  type_info[:constraints].each do |constraint|
    unless constraint.satisfied?(value)
      @errors << "Constraint violation: #{constraint.condition}"
      return false
    end
  end

  true
end