diff options
| -rw-r--r-- | README.md | 2 | ||||
| -rw-r--r-- | example/input.txt | 2 | ||||
| -rw-r--r-- | src/elixir_math_parser.yrl | 1 |
3 files changed, 3 insertions, 2 deletions
@@ -2,4 +2,4 @@ A math script parser in Elixir. -Using leex, yecc and ratio. +Using leex, yecc and a modified version of Ratio from hexpm. diff --git a/example/input.txt b/example/input.txt index 8cb02c5..32146f2 100644 --- a/example/input.txt +++ b/example/input.txt @@ -6,4 +6,4 @@ y = 2! z = y/2 10 + 4(z / y)(x / 4) -x^(0-y) +x^(-y) diff --git a/src/elixir_math_parser.yrl b/src/elixir_math_parser.yrl index 006c768..f8de916 100644 --- a/src/elixir_math_parser.yrl +++ b/src/elixir_math_parser.yrl @@ -50,6 +50,7 @@ expr -> exprs '/' exprs : {div_op, '$1', '$3'}. expr -> expr '!' : {factor_op, '$1'}. expr -> exprs '^' exprs : {exp_op, '$1', '$3'}. expr -> '(' exprs ')' : '$2'. +expr -> '-' exprs : {sub_op, {int, 0, 0}, '$2'}. Erlang code. |