Created an interpreter class and even made it interpret something.

1 files changed, 44 insertions, 0 deletions

diff --git a/interpreter.py b/interpreter.py
new file mode 100755
index 0000000..91b6a7c
--- /dev/null
+++ b/interpreter.py
@@ -0,0 +1,44 @@
+#!/usr/bin/python3 -tt
+
+# Copyright 2012 Jussi Pakkanen
+
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+
+#     http://www.apache.org/licenses/LICENSE-2.0
+
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import parser
+import nodes
+
+class InterpreterException(Exception):
+    pass
+
+class InvalidCode(InterpreterException):
+    pass
+
+class Interpreter():
+    
+    def __init__(self, code):
+        self.ast = parser.build_ast(code)
+        self.sanity_check_ast()
+        
+    def sanity_check_ast(self):
+        if not isinstance(self.ast, nodes.CodeBlock):
+            raise InvalidCode('AST is of invalid type. Possibly a bug in the parser.')
+        if len(self.ast.get_statements()) == 0:
+            raise InvalidCode('No statements in code.')
+        first = self.ast.get_statements()[0]
+        if not isinstance(first, nodes.FunctionCall) or first.get_function_name() != 'project':
+            raise InvalidCode('First statement must be a call to project')
+            
+
+if __name__ == '__main__':
+    code = "project('myawesomeproject')"
+    i = Interpreter(code)