feat(parser): supports literal decimal numbers

2 files changed, 18 insertions, 0 deletions

diff --git a/lib/math/Calc.ex b/lib/math/calc.ex
index 7dc5fcc..7dc5fcc 100644
--- a/lib/math/Calc.ex
+++ b/lib/math/calc.ex
diff --git a/lib/math/conversion.ex b/lib/math/conversion.ex
new file mode 100644
index 0000000..65ddf8f
--- /dev/null
+++ b/lib/math/conversion.ex
@@ -0,0 +1,18 @@
+defmodule ElixirMathParser.Math.Conversion do
+  alias ElixirMathParser.Math.Rational
+
+  def literal_float_to_rational(value) do
+    {int, dec} = Integer.parse(value)
+
+    String.graphemes(dec)
+    |> Enum.reduce(Rational.new(int), fn v, acc ->
+      if v != "." do
+        num = Rational.numerator(acc) * 10
+        den = Rational.denominator(acc) * 10
+        Rational.new(num + String.to_integer(v), den)
+      else
+        acc
+      end
+    end)
+  end
+end