From 416db85a296ae77329e959e95e236204a5757d77 Mon Sep 17 00:00:00 2001
From: dm1sh <me@dmitriy.icu>
Date: Tue, 17 Oct 2023 23:02:00 +0300
Subject: [PATCH] Added math constants to Parser evaluator

---
 parser/parser/constants.py | 6 ++++++
 parser/parser/parser.py    | 6 +++---
 2 files changed, 9 insertions(+), 3 deletions(-)
 create mode 100644 parser/parser/constants.py

diff --git a/parser/parser/constants.py b/parser/parser/constants.py
new file mode 100644
index 0000000..6b7b711
--- /dev/null
+++ b/parser/parser/constants.py
@@ -0,0 +1,6 @@
+import numpy as np
+
+CONSTANTS = {
+    "e": np.e,
+    "pi": np.pi,
+}
diff --git a/parser/parser/parser.py b/parser/parser/parser.py
index 71eaa1c..4619e53 100644
--- a/parser/parser/parser.py
+++ b/parser/parser/parser.py
@@ -1,5 +1,3 @@
-from collections.abc import Mapping
-
 from .expression import BinaryExpression, Expression, UnaryExpression, ValueExpression
 from .operation import (
     BraceOperation,
@@ -10,6 +8,7 @@ from .operation import (
 )
 from .tokenizer import Token, Tokenizer
 from .types import ValueType
+from .constants import CONSTANTS
 
 
 class Parser:
@@ -64,7 +63,8 @@ class Parser:
 
         self.__debug_expr = repr(self.val_stack)
 
-    def evaluate(self, variables: Mapping[str, ValueType]):
+    def evaluate(self, variables: dict[str, ValueType]):
+        variables |= CONSTANTS
         return self._evaluator(variables)
 
     def do_one(self):