Class: Idl::CsrFieldAssignmentAst

Inherits:
AstNode
  • Object
show all
Includes:
Executable
Defined in:
lib/idlc/ast.rb,
lib/idlc/passes/prune.rb,
lib/idlc/passes/gen_adoc.rb

Constant Summary

Constants inherited from AstNode

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

Instance Attribute Summary

Attributes inherited from AstNode

#children, #input, #interval, #parent

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Executable

#executable?

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, #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, csr_field, write_value) ⇒ CsrFieldAssignmentAst

Returns a new instance of CsrFieldAssignmentAst.



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# File 'lib/idlc/ast.rb', line 3367

def initialize(input, interval, csr_field, write_value)
  super(input, interval, [csr_field, write_value])
end

Class Method Details

.from_h(yaml, source_mapper) ⇒ Object 



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# File 'lib/idlc/ast.rb', line 3404

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

  input = input_from_source_yaml(yaml.fetch("source"), source_mapper)
  interval = interval_from_source_yaml(yaml.fetch("source"))
  CsrFieldAssignmentAst.new(
    input, interval,
    T.cast(AstNode.from_h(yaml.fetch("csr_field"), source_mapper), CsrFieldReadExpressionAst),
    T.cast(AstNode.from_h(yaml.fetch("value"), source_mapper), RvalueAst)
  )
end

Instance Method Details

#const_eval?(symtab) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/idlc/ast.rb', line 3361

def const_eval?(symtab) = false

#csr_field ⇒ Object 



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# File 'lib/idlc/ast.rb', line 3363

def csr_field = T.cast(@children[0], CsrFieldReadExpressionAst)

#execute(symtab) ⇒ void

This method returns an undefined value.

“execute” the statement by updating the variables in the symbol table

Parameters:

  • symtab (SymbolTable) —

    The symbol table for the context

Raises:

  • ValueError if some part of the statement cannot be executed at compile time



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# File 'lib/idlc/ast.rb', line 3388

def execute(symtab)
  value_error "CSR field writes are never compile-time-executable"
end

#field(symtab) ⇒ Object 



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# File 'lib/idlc/ast.rb', line 3376

def field(symtab)
  csr_field.field_def(symtab)
end

#gen_adoc(indent, indent_spaces: 2) ⇒ Object 



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# File 'lib/idlc/passes/gen_adoc.rb', line 117

def gen_adoc(indent, indent_spaces: 2)
  "#{' ' * indent}#{csr_field.gen_adoc(indent, indent_spaces:)} = #{write_value.gen_adoc(0, indent_spaces:)}"
end

#prune(symtab, forced_type: nil) ⇒ Object 



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# File 'lib/idlc/passes/prune.rb', line 726

def prune(symtab, forced_type: nil)
  CsrFieldAssignmentAst.new(input, interval, csr_field.dup, write_value.prune(symtab))
end

#to_h ⇒ Object 



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# File 'lib/idlc/ast.rb', line 3396

def to_h = {
  "kind" => "csr_field_assignment",
  "csr_field" => csr_field.to_h,
  "value" => write_value.to_h,
  "source" => source_yaml
}

#to_idl ⇒ Object 



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# File 'lib/idlc/ast.rb', line 3393

def to_idl = "#{csr_field.to_idl} = #{write_value.to_idl}"

#type(symtab) ⇒ Object 



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# File 'lib/idlc/ast.rb', line 3372

def type(symtab)
  csr_field.type(symtab)
end

#type_check(symtab, strict:) ⇒ Object 



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# File 'lib/idlc/ast.rb', line 3380

def type_check(symtab, strict:)
  csr_field.type_check(symtab, strict:)

  write_value.type_check(symtab, strict:)
  type_error "Incompatible type in assignment" unless write_value.type(symtab).convertable_to?(type(symtab))
end

#write_value ⇒ Object 



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# File 'lib/idlc/ast.rb', line 3364

def write_value = T.cast(@children[1], RvalueAst)