[clang] [libclang/python] Expose Rewriter to the libclang python binding. (PR #71341)
Jimmy Z via cfe-commits
cfe-commits at lists.llvm.org
Sun Nov 5 16:44:20 PST 2023
https://github.com/jimmy-zx updated https://github.com/llvm/llvm-project/pull/71341
>From 887751e365ca72515679f61d0734b1631ac38335 Mon Sep 17 00:00:00 2001
From: Jimmy Z <51149050+jimmy-zx at users.noreply.github.com>
Date: Mon, 6 Nov 2023 00:25:39 +0000
Subject: [PATCH 1/3] [libclang/python] Expose Rewriter to the libclang python
binding.
---
clang/bindings/python/clang/cindex.py | 62 ++++++++++++++++
.../python/tests/cindex/test_rewrite.py | 74 +++++++++++++++++++
2 files changed, 136 insertions(+)
create mode 100644 clang/bindings/python/tests/cindex/test_rewrite.py
diff --git a/clang/bindings/python/clang/cindex.py b/clang/bindings/python/clang/cindex.py
index 6a16f3a9ef6e957..e51d558ab73fbce 100644
--- a/clang/bindings/python/clang/cindex.py
+++ b/clang/bindings/python/clang/cindex.py
@@ -3531,6 +3531,61 @@ def cursor(self):
return cursor
+class Rewriter(ClangObject):
+ """
+ The Rewriter is a wrapper class around clang::Rewriter
+
+ It enables rewriting buffers.
+ """
+
+ @staticmethod
+ def create(tu):
+ """
+ Creates a new Rewriter
+ Parameters:
+ tu -- The translation unit for the target AST.
+ """
+ return Rewriter(conf.lib.clang_CXRewriter_create(tu))
+
+ def __init__(self, ptr):
+ ClangObject.__init__(self, ptr)
+
+ def __del__(self):
+ conf.lib.clang_CXRewriter_dispose(self)
+
+ def insertTextBefore(self, loc, insert):
+ """
+ Insert the specified string at the specified location in the original buffer.
+ """
+ conf.lib.clang_CXRewriter_insertTextBefore(self, loc, insert)
+
+ def replaceText(self, toBeReplaced, replacement):
+ """
+ This method replaces a range of characters in the input buffer with a new string.
+ """
+ conf.lib.clang_CXRewriter_replaceText(self, toBeReplaced, replacement)
+
+ def removeText(self, toBeRemoved):
+ """
+ Remove the specified text region.
+ """
+ conf.lib.clang_CXRewriter_removeText(self, toBeRemoved)
+
+ def overwriteChangedFiles(self):
+ """
+ Save all changed files to disk.
+ """
+ conf.lib.clang_CXRewriter_overwriteChangedFiles(self)
+
+ def writeMainFileToStdOut(self):
+ """
+ Writes the main file to stdout.
+ """
+ conf.lib.clang_CXRewriter_writeMainFileToStdOut(self)
+
+
+
+
# Now comes the plumbing to hook up the C library.
# Register callback types in common container.
@@ -3596,6 +3651,13 @@ def cursor(self):
("clang_codeCompleteGetNumDiagnostics", [CodeCompletionResults], c_int),
("clang_createIndex", [c_int, c_int], c_object_p),
("clang_createTranslationUnit", [Index, c_interop_string], c_object_p),
+ ("clang_CXRewriter_create", [TranslationUnit], c_object_p),
+ ("clang_CXRewriter_dispose", [Rewriter]),
+ ("clang_CXRewriter_insertTextBefore", [Rewriter, SourceLocation, c_interop_string]),
+ ("clang_CXRewriter_overwriteChangedFiles", [Rewriter], c_int),
+ ("clang_CXRewriter_removeText", [Rewriter, SourceRange]),
+ ("clang_CXRewriter_replaceText", [Rewriter, SourceRange, c_interop_string]),
+ ("clang_CXRewriter_writeMainFileToStdOut", [Rewriter]),
("clang_CXXConstructor_isConvertingConstructor", [Cursor], bool),
("clang_CXXConstructor_isCopyConstructor", [Cursor], bool),
("clang_CXXConstructor_isDefaultConstructor", [Cursor], bool),
diff --git a/clang/bindings/python/tests/cindex/test_rewrite.py b/clang/bindings/python/tests/cindex/test_rewrite.py
new file mode 100644
index 000000000000000..eb697f72a923030
--- /dev/null
+++ b/clang/bindings/python/tests/cindex/test_rewrite.py
@@ -0,0 +1,74 @@
+import sys
+import io
+import unittest
+import tempfile
+
+from clang.cindex import Rewriter, TranslationUnit, Config, File, SourceLocation, SourceRange
+
+class TestRewrite(unittest.TestCase):
+ code = '''
+int test1;
+
+void test2(void);
+
+int f(int c) {
+ return c;
+}
+'''
+
+ @classmethod
+ def setUpClass(cls):
+ Config.set_compatibility_check(False)
+
+ def setUp(self):
+ self.tmp = tempfile.NamedTemporaryFile(suffix='.cpp', buffering=0)
+ self.tmp.write(TestRewrite.code.encode('utf-8'))
+ self.tmp.flush()
+ self.tu = TranslationUnit.from_source(self.tmp.name)
+ self.rew = Rewriter.create(self.tu)
+ self.file = File.from_name(self.tu, self.tmp.name)
+
+ def tearDown(self):
+ self.tmp.close()
+
+
+ def test_insert(self):
+ snip = '#include <cstdio>\n'
+
+ beginning = SourceLocation.from_offset(self.tu, self.file, 0)
+ self.rew.insertTextBefore(beginning, snip)
+ self.rew.overwriteChangedFiles()
+
+ with open(self.tmp.name, 'r', encoding='utf-8') as f:
+ self.assertEqual(f.read(), snip + TestRewrite.code)
+
+
+ def test_replace(self):
+ pattern = 'test2'
+ replacement = 'func'
+
+ offset = TestRewrite.code.find(pattern)
+ pattern_range = SourceRange.from_locations(
+ SourceLocation.from_offset(self.tu, self.file, offset),
+ SourceLocation.from_offset(self.tu, self.file, offset + len(pattern))
+ )
+ self.rew.replaceText(pattern_range, replacement)
+ self.rew.overwriteChangedFiles()
+
+ with open(self.tmp.name, 'r', encoding='utf-8') as f:
+ self.assertEqual(f.read(), TestRewrite.code.replace(pattern, replacement))
+
+
+ def test_remove(self):
+ pattern = 'int c'
+
+ offset = TestRewrite.code.find(pattern)
+ pattern_range = SourceRange.from_locations(
+ SourceLocation.from_offset(self.tu, self.file, offset),
+ SourceLocation.from_offset(self.tu, self.file, offset + len(pattern))
+ )
+ self.rew.removeText(pattern_range)
+ self.rew.overwriteChangedFiles()
+
+ with open(self.tmp.name, 'r', encoding='utf-8') as f:
+ self.assertEqual(f.read(), TestRewrite.code.replace(pattern, ''))
>From 27cb50dce8496d24b76cd982eb812f51dbe72af5 Mon Sep 17 00:00:00 2001
From: Jimmy Z <51149050+jimmy-zx at users.noreply.github.com>
Date: Mon, 6 Nov 2023 00:31:03 +0000
Subject: [PATCH 2/3] removed setup for compatability check
---
clang/bindings/python/tests/cindex/test_rewrite.py | 4 ----
1 file changed, 4 deletions(-)
diff --git a/clang/bindings/python/tests/cindex/test_rewrite.py b/clang/bindings/python/tests/cindex/test_rewrite.py
index eb697f72a923030..8c0e6ce9a811c10 100644
--- a/clang/bindings/python/tests/cindex/test_rewrite.py
+++ b/clang/bindings/python/tests/cindex/test_rewrite.py
@@ -16,10 +16,6 @@ class TestRewrite(unittest.TestCase):
}
'''
- @classmethod
- def setUpClass(cls):
- Config.set_compatibility_check(False)
-
def setUp(self):
self.tmp = tempfile.NamedTemporaryFile(suffix='.cpp', buffering=0)
self.tmp.write(TestRewrite.code.encode('utf-8'))
>From cdc4eb10cb5ef5738b9f13cb1e3d4ece5c30bc26 Mon Sep 17 00:00:00 2001
From: Jimmy Z <51149050+jimmy-zx at users.noreply.github.com>
Date: Mon, 6 Nov 2023 00:44:09 +0000
Subject: [PATCH 3/3] fix formatting
---
clang/bindings/python/clang/cindex.py | 2 --
clang/bindings/python/tests/cindex/test_rewrite.py | 5 ++++-
2 files changed, 4 insertions(+), 3 deletions(-)
diff --git a/clang/bindings/python/clang/cindex.py b/clang/bindings/python/clang/cindex.py
index e51d558ab73fbce..8695cf61cb8bb03 100644
--- a/clang/bindings/python/clang/cindex.py
+++ b/clang/bindings/python/clang/cindex.py
@@ -3584,8 +3584,6 @@ def writeMainFileToStdOut(self):
conf.lib.clang_CXRewriter_writeMainFileToStdOut(self)
-
-
# Now comes the plumbing to hook up the C library.
# Register callback types in common container.
diff --git a/clang/bindings/python/tests/cindex/test_rewrite.py b/clang/bindings/python/tests/cindex/test_rewrite.py
index 8c0e6ce9a811c10..eff200c1a9bdd76 100644
--- a/clang/bindings/python/tests/cindex/test_rewrite.py
+++ b/clang/bindings/python/tests/cindex/test_rewrite.py
@@ -3,7 +3,10 @@
import unittest
import tempfile
-from clang.cindex import Rewriter, TranslationUnit, Config, File, SourceLocation, SourceRange
+from clang.cindex import (
+ Rewriter, TranslationUnit, Config, File, SourceLocation, SourceRange
+ )
+
class TestRewrite(unittest.TestCase):
code = '''
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