class AdLint::Exam::CBuiltin::W0777

Public Class Methods

new(phase_ctxt) click to toggle source
Calls superclass method AdLint::Examination::new
# File lib/adlint/exam/c_builtin/cc1_check.rb, line 19080
def initialize(phase_ctxt)
  super
  @interp = phase_ctxt[:cc1_interpreter]
  @interp.on_implicit_conv_performed    += T(:check)
  @interp.on_function_started           += T(:clear_rvalues)
  @interp.on_additive_expr_evaled       += T(:handle_additive)
  @interp.on_multiplicative_expr_evaled += T(:handle_multiplicative)
  @rvalues = nil
end

Private Instance Methods

check(*, orig_var, rslt_var) click to toggle source
# File lib/adlint/exam/c_builtin/cc1_check.rb, line 19091
def check(*, orig_var, rslt_var)
  return unless @rvalues && orig_var.type.floating?
  case expr = @rvalues[orig_var]
  when Cc1::AdditiveExpression, Cc1::MultiplicativeExpression
    if orig_var.type.same_as?(from_type) && rslt_var.type.same_as?(to_type)
      W(expr.location)
    end
  end
end
clear_rvalues(*) click to toggle source
# File lib/adlint/exam/c_builtin/cc1_check.rb, line 19101
def clear_rvalues(*)
  @rvalues = {}
end
from_type() click to toggle source
# File lib/adlint/exam/c_builtin/cc1_check.rb, line 19119
def from_type
  float_t
end
handle_additive(expr, *, rslt_var) click to toggle source
# File lib/adlint/exam/c_builtin/cc1_check.rb, line 19105
def handle_additive(expr, *, rslt_var)
  memorize_rvalue_derivation(rslt_var, expr)
end
handle_multiplicative(expr, *, rslt_var) click to toggle source
# File lib/adlint/exam/c_builtin/cc1_check.rb, line 19109
def handle_multiplicative(expr, *, rslt_var)
  unless expr.operator.type == "%"
    memorize_rvalue_derivation(rslt_var, expr)
  end
end
interpreter() click to toggle source
# File lib/adlint/exam/c_builtin/cc1_check.rb, line 19127
def interpreter
  @interp
end
memorize_rvalue_derivation(rvalue_holder, expr) click to toggle source
# File lib/adlint/exam/c_builtin/cc1_check.rb, line 19115
def memorize_rvalue_derivation(rvalue_holder, expr)
  @rvalues[rvalue_holder] = expr if @rvalues
end
to_type() click to toggle source
# File lib/adlint/exam/c_builtin/cc1_check.rb, line 19123
def to_type
  double_t
end