add docs

1 files changed, 75 insertions, 9 deletions

diff --git a/tests/if-else.py b/tests/if-else.py
index b557696..933d567 100644
--- a/tests/if-else.py
+++ b/tests/if-else.py
@@ -1,11 +1,77 @@
-"""
-@TODO 包括`tests\if-else.py`在内的各种示例文件的介绍
-"""
+class AssignNode:
+    def __init__(self, variable, value):
+        self.variable = variable
+        self.value = value
 
-from psi import Psi
+class ComparisonNode:
+    def __init__(self, operator, left, right):
+        self.operator = operator
+        self.left = left
+        self.right = right
 
-psi_instance = Psi("? a == 1: reply: 你好")
-print(psi_instance)
-psi_instance.execute()
-result = psi_instance.get_result()
-print(result)
\ No newline at end of file
+class IfNode:
+    def __init__(self, condition, body):
+        self.condition = condition
+        self.body = body
+
+class ReplyNode:
+    def __init__(self, message):
+        self.message = message
+
+import ast
+
+def parse_code(code):
+    tree = ast.parse(code)
+    return parse_node(tree.body[0])
+
+def parse_node(node):
+    if isinstance(node, ast.Assign):
+        variable = node.targets[0].id
+        value = parse_node(node.value)
+        return AssignNode(variable, value)
+    elif isinstance(node, ast.Compare):
+        operator = node.ops[0]
+        left = parse_node(node.left)
+        right = parse_node(node.comparators[0])
+        return ComparisonNode(operator, left, right)
+    elif isinstance(node, ast.If):
+        condition = parse_node(node.test)
+        body = parse_node(node.body[0])
+        return IfNode(condition, body)
+    elif isinstance(node, ast.Expr):
+        return ReplyNode(node.value.s)
+    elif isinstance(node, ast.Name):
+        return node.id
+    elif isinstance(node, ast.Num):
+        return node.n
+
+def execute_ast(ast, environment):
+    if isinstance(ast, AssignNode):
+        environment[ast.variable] = ast.value
+    elif isinstance(ast, ComparisonNode):
+        left = execute_ast(ast.left, environment)
+        right = execute_ast(ast.right, environment)
+        if ast.operator == '==':
+            return left == right
+        elif ast.operator == '!=':
+            return left != right
+        elif ast.operator == '<':
+            return left < right
+        elif ast.operator == '>':
+            return left > right
+    elif isinstance(ast, IfNode):
+        condition = execute_ast(ast.condition, environment)
+        if condition:
+            execute_ast(ast.body, environment)
+    elif isinstance(ast, ReplyNode):
+        message = ast.message.format(**environment)
+        print(message)
+
+def main():
+    code = input("请输入代码: ")
+    ast = parse_code(code)
+    environment = {}
+    execute_ast(ast, environment)
+
+if __name__ == "__main__":
+    main()