Class: Idl::ArraySizeAst

Inherits:
AstNode show all
Includes:
Rvalue
Defined in:
lib/idlc/ast.rb,
lib/idlc/passes/gen_adoc.rb

Constant Summary

Constants inherited from AstNode

Idl::AstNode::Bits1Type, Idl::AstNode::Bits32Type, Idl::AstNode::Bits64Type, Idl::AstNode::BoolType, Idl::AstNode::ConstBoolType, Idl::AstNode::PossiblyUnknownBits1Type, Idl::AstNode::PossiblyUnknownBits32Type, Idl::AstNode::PossiblyUnknownBits64Type, Idl::AstNode::ReachableFunctionCacheType, Idl::AstNode::StringType, Idl::AstNode::VoidType

Instance Attribute Summary

Attributes inherited from AstNode

#children, #input, #interval, #parent

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Rvalue

#max_value, #min_value, #truncate, #values

Methods inherited from AstNode

#always_terminates?, #declaration?, #executable?, extract_base_var_name, #find_ancestor, #find_dst_registers, #find_referenced_csrs, #find_src_registers, #freeze_tree, #gen_option_adoc, #input_file, input_from_source_yaml, #inspect, #internal_error, interval_from_source_yaml, #lineno, #lines_around, #nullify_assignments, #pass_find_return_values, #path, #print_ast, #prune, #reachable_exceptions, #reachable_functions, #set_input_file, #set_input_file_unless_already_set, #source_line_file_offsets, #source_starting_offset, #source_yaml, #starting_line, #text_value, #truncation_warn, #type_error, #unindent, value_else, #value_else, value_error, #value_error, value_try, #value_try, write_back_nested

Constructor Details

#initialize(input, interval, expression) ⇒ ArraySizeAst

Returns a new instance of ArraySizeAst.



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# File 'lib/idlc/ast.rb', line 1583

def initialize(input, interval, expression)
  super(input, interval, [expression])
end

Class Method Details

.from_h(yaml, source_mapper) ⇒ Object 



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# File 'lib/idlc/ast.rb', line 1622

def self.from_h(yaml, source_mapper)
  raise "Bad YAML" unless yaml.key?("kind") && yaml.fetch("kind") == "array_size_funcall"

  input = input_from_source_yaml(yaml.fetch("source"), source_mapper)
  interval = interval_from_source_yaml(yaml.fetch("source"))
  ArraySizeAst.new(
    input, interval,
    T.cast(AstNode.from_h(yaml.fetch("array"), source_mapper), T.all(Rvalue, AstNode))
  )
end

Instance Method Details

#const_eval?(symtab) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/idlc/ast.rb', line 1581

def const_eval?(symtab) = true

#expression ⇒ AstNode

Returns Array expression.

Returns:



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# File 'lib/idlc/ast.rb', line 1578

def expression = children[0]

#gen_adoc(indent = 0, indent_spaces: 2) ⇒ Object 



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# File 'lib/idlc/passes/gen_adoc.rb', line 301

def gen_adoc(indent = 0, indent_spaces: 2)
  "#{' ' * indent}$array_size(#{expression.gen_adoc(0, indent_spaces:)})"
end

#to_h ⇒ Object 



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# File 'lib/idlc/ast.rb', line 1615

def to_h = {
  "kind" => "array_size_funcall",
  "array" => expression.to_h,
  "source" => source_yaml
}

#to_idl ⇒ Object 



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# File 'lib/idlc/ast.rb', line 1612

def to_idl = "$array_size(#{expression.to_idl})"

#type(symtab) ⇒ Object 



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# File 'lib/idlc/ast.rb', line 1594

def type(symtab)
  if expression.type(symtab).width == :unknown
    Type.new(:bits, width: :unknown, qualifiers: [:const, :known])
  else
    len = expression.type(symtab).width.bit_length
    len = len.zero? ? 1 : len
    Type.new(:bits, width: len, qualifiers: [:const, :known])
  end
end

#type_check(symtab, strict:) ⇒ Object 



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# File 'lib/idlc/ast.rb', line 1587

def type_check(symtab, strict:)
  expression.type_check(symtab, strict:)
  expression_type = expression.type(symtab)
  type_error "#{expression.text_value} is not an array" unless expression_type.kind == :array
  type_error "#{expression.text_value} must be a constant" unless expression_type.const?
end

#value(symtab) ⇒ Object 



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# File 'lib/idlc/ast.rb', line 1605

def value(symtab)
  w = expression.type(symtab).width
  value_error "Width of the array is unknown" if w == :unknown
  T.cast(w, Integer)
end