Jasinta Changeset - 2dc5ec5e11be

Changeset - 2dc5ec5e11be

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Laman - 2 years ago 2023-01-01 21:11:21

AssignmentExpression

2 files changed with 28 insertions and 2 deletions:

src/jasinta.py

tests/test_jasinta.py

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src/jasinta.py

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@@ @@ -58,12 +58,25 @@ class MemberExpression: @@
 	def eval(self, context):
 		obj = evaluate(self.node["object"], context)
 		prop = evaluate(self.node["property"], [obj])
 		return prop
 class AssignmentExpression:
 	def __init__(self, node):
 		self.node = node
 	def eval(self, context):
 		left = evaluate(self.node["left"], context)
 		right = evaluate(self.node["right"], context)
 		if self.node["operator"] == "+=":
 			left.val += right.val
 		else:
 			raise NotImplementedError
 class BinaryExpression:
 	def __init__(self, node):
 		self.node = node
 	def eval(self, context):
 		left = evaluate(self.node["left"], context)
@@ @@ -121,13 +134,13 @@ class Literal: @@
 				return Number(val)
 		else:
 			raise NotImplementedError
 node_index = {cls.__name__: cls for cls in [
 	Program, ExpressionStatement, CallExpression, MemberExpression, EmptyStatement, BinaryExpression,
 	VariableDeclaration, VariableDeclarator, Literal
 	Program, ExpressionStatement, CallExpression, MemberExpression, EmptyStatement, AssignmentExpression,
 	BinaryExpression, VariableDeclaration, VariableDeclarator, Literal
 ]}
 def interpret(parse_tree):
 	return evaluate(parse_tree, [stdlib])

tests/test_jasinta.py

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@@ @@ -13,6 +13,19 @@ class TestBasicAddition(TestCase): @@
 var b=1;
 var c=a+b;
 document.write(c);"""
 		interpret(parse(s))
 		mock_print.assert_called_with(4)
 class TestAssignment(TestCase):
 	@patch("builtins.print")
 	def test_interpret(self, mock_print):
 		s = """var a=1;
 var b=1;
 a+=b;
 b+=a;
 document.write(b);"""
 		interpret(parse(s))
 		mock_print.assert_called_with(3)

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