Add parser for arbitrary expressions

The expressions can be used in if 'test' and in the
right side of assignements.

The expressions can contain any number of sub-expressions
combined by either arithmetic operators, comparison operators,
or boolean operators.

Random Usage Examples:
$result = ((( $two + 2) / $one) + 4 * 5.45) - (6 << 7) + (0x800 + -9)
or
if ($a < 10) and ($a + 10 != 200) {
...
}

2 files changed, 14 insertions, 0 deletions

diff --git a/test/data/snippets/arithmetic_expression.pp b/test/data/snippets/arithmetic_expression.pp
new file mode 100644
index 000000000..aae98a4db
--- /dev/null
+++ b/test/data/snippets/arithmetic_expression.pp
@@ -0,0 +1,8 @@
+
+$one = 1.30
+$two = 2.034e-2
+
+$result = ((( $two + 2) / $one) + 4 * 5.45) - (6 << 7) + (0x800 + -9)
+
+
+notice("result is $result == 1295.87692307692")
\ No newline at end of file
diff --git a/test/data/snippets/ifexpression.rb b/test/data/snippets/ifexpression.rb
new file mode 100644
index 000000000..eea3b855b
--- /dev/null
+++ b/test/data/snippets/ifexpression.rb
@@ -0,0 +1,6 @@
+$one = 1
+$two = 2
+
+if ($one < $two) and (($two < 3) or ($two == 2)) {
+    notice("True!")
+}