-ast-dumpオプションを使うと，ASTを吐き出してくれる-ast-dump=jsonでJSON形式を出力してくれるimport json import subprocess def walk(item): if "kind" in item: print(item["kind"]) for child in item.get("inner", []): walk(child) proc = subprocess.run(["clang++", "-x", "c++", "-std=c++2b", "-Xclang", "-ast-dump=json", "-fsyntax-only", "a.cpp"], capture_output=True) if 0 == proc.returncode: walk(json.loads(proc.stdout)) else: print(proc.stderr.decode("utf-8")) exit(1)
kind: ノードのタイプinner: 子ノードのリスト| kind | コード例 | 説明 |
|---|---|---|
| TranslationUnitDecl | - | 翻訳単位(Rootノード) |
| TypedefDecl | typedef A B; | typedef宣言 |
| NamespaceDecl | namespace { } | 名前空間宣言 |
| FunctionDecl | void f() { } | 関数宣言 |
| CompoundStmt | { } | ブロック |
| ReturnStmt | return; | return文 |
| IntegerLiteral | 0 | 数値リテラル |
今後追記予定
int main() { return 0; }
{
"id": "0x121829c08",
"kind": "TranslationUnitDecl",
"loc": {},
"range": {
"begin": {},
"end": {}
},
"inner": [
"...省略...",
{
"id": "0x12102e440",
"kind": "FunctionDecl",
"loc": {
"offset": 4,
"file": "a.cc",
"line": 1,
"col": 5,
"tokLen": 4
},
"range": {
"begin": {
"offset": 0,
"col": 1,
"tokLen": 3
},
"end": {
"offset": 23,
"col": 24,
"tokLen": 1
}
},
"name": "main",
"mangledName": "_main",
"type": {
"qualType": "int ()"
},
"inner": [
{
"id": "0x12102e588",
"kind": "CompoundStmt",
"range": {
"begin": {
"offset": 11,
"col": 12,
"tokLen": 1
},
"end": {
"offset": 23,
"col": 24,
"tokLen": 1
}
},
"inner": [
{
"id": "0x12102e578",
"kind": "ReturnStmt",
"range": {
"begin": {
"offset": 13,
"col": 14,
"tokLen": 6
},
"end": {
"offset": 20,
"col": 21,
"tokLen": 1
}
},
"inner": [
{
"id": "0x12102e558",
"kind": "IntegerLiteral",
"range": {
"begin": {
"offset": 20,
"col": 21,
"tokLen": 1
},
"end": {
"offset": 20,
"col": 21,
"tokLen": 1
}
},
"type": {
"qualType": "int"
},
"valueCategory": "prvalue",
"value": "0"
}
]
}
]
}
]
}
]
}