[cfe-dev] Help - Matchers for ObjC AST nodes?
Dean Sutherland
dfsuther at yahoo-inc.com
Wed Nov 5 11:59:57 PST 2014
I'd already read the matcher guide, as well as reading through the suggested .h files. Sadly, I completely missed seeing that the various .cc files that implement the matchers lacked imports of the *ObjC.h files from the AST. Adding those imports has made my compilation errors evaporate. I'm back to making progress!
Dean
On Wednesday, November 5, 2014 12:26 AM, Gabor Kozar <kozargabor at gmail.com> wrote:
Take a look at the AST matcher guide: http://clang.llvm.org/docs/LibASTMatchers.html
In the source tree, check out clang/include/clang/ASTMatchers/ASTMatchersMacros.h for the macros used for writing matchers, and clang/include/clang/ASTMatchers/ASTMatchers.h to look at how existing matchers are implemented.
---
Best regards,
Gábor 'ShdNx' Kozár
http://gaborkozar.me
On Wed, Nov 5, 2014, at 00:27, Dean Sutherland wrote:
I'd like to write a matcher that would find the following ObjectiveC
snippet:
[self.externalWebView loadHTMLString:@"" baseURL:nil];
(A dump of the AST for this code snippet is appended at the end of this
message.)
If matchers for ObjC AST nodes existed, the matcher I want might look
something like this:
objcMessageExpr(hasSelector("loadHTMLString:baseURL:"),
hasArgument(1, ignoringParenImpCasts(integerLiteral(equals(0)))));
How do I go about writing the matchers I need, such as objcMessageExpr
and hasSelector? I took a whack at the writing objcMessageExpr and
promptly got lost in failed template instantiation errors.
Suggestions or guidance would be most welcome.
Dean
dfsuther at yahoo-inc.com
-----------------------
`-ExprWithCleanups 0x7fb8af3f4210 <line:927:13,col:72> 'void'
`-ObjCMessageExpr 0x7fb8af3f41c8 <col:13,col:72> 'void'
selector=loadHTMLString:baseURL:
|-PseudoObjectExpr 0x7fb8af3f4188 <col:14,col:34> 'UIWebView *'
| |-ObjCPropertyRefExpr 0x7fb8af3f4110 <col:14,col:34> '<pseudo-object
type>' lvalue objcproperty Kind=PropertyRef Property="webview"
Messaging=Getter
| | `-OpaqueValueExpr 0x7fb8af3f40f0 <col:14,col:19> 'HRBookendedWebView
*'
| | `-PseudoObjectExpr 0x7fb8af3f17c8 <col:14,col:19>
'HRBookendedWebView *'
| | |-ObjCPropertyRefExpr 0x7fb8af3f1750 <col:14,col:19>
'<pseudo-object type>' lvalue objcproperty Kind=PropertyRef
Property="articleWebView" Messaging=Getter
| | | `-OpaqueValueExpr 0x7fb8af3f1730 <col:14>
'HRiPadArticleViewController *'
| | | `-ImplicitCastExpr 0x7fb8af3f16e8 <col:14>
'HRiPadArticleViewController *' <LValueToRValue>
| | | `-DeclRefExpr 0x7fb8af3f16c0 <col:14>
'HRiPadArticleViewController *const __strong' lvalue ImplicitParam
0x7fb8af3f0dd0 'self' 'HRiPadArticleViewController *const __strong'
| | |-OpaqueValueExpr 0x7fb8af3f1730 <col:14>
'HRiPadArticleViewController *'
| | | `-ImplicitCastExpr 0x7fb8af3f16e8 <col:14>
'HRiPadArticleViewController *' <LValueToRValue>
| | | `-DeclRefExpr 0x7fb8af3f16c0 <col:14>
'HRiPadArticleViewController *const __strong' lvalue ImplicitParam
0x7fb8af3f0dd0 'self' 'HRiPadArticleViewController *const __strong'
| | `-ImplicitCastExpr 0x7fb8af3f17b0 <col:19> 'HRBookendedWebView *'
<ARCReclaimReturnedObject>
| | `-ObjCMessageExpr 0x7fb8af3f1780 <col:19> 'HRBookendedWebView
*' selector=articleWebView
| | `-OpaqueValueExpr 0x7fb8af3f1730 <col:14>
'HRiPadArticleViewController *'
| | `-ImplicitCastExpr 0x7fb8af3f16e8 <col:14>
'HRiPadArticleViewController *' <LValueToRValue>
| | `-DeclRefExpr 0x7fb8af3f16c0 <col:14>
'HRiPadArticleViewController *const __strong' lvalue ImplicitParam
0x7fb8af3f0dd0 'self' 'HRiPadArticleViewController *const __strong'
| |-OpaqueValueExpr 0x7fb8af3f40f0 <col:14,col:19> 'HRBookendedWebView
*'
| | `-PseudoObjectExpr 0x7fb8af3f17c8 <col:14,col:19>
'HRBookendedWebView *'
| | |-ObjCPropertyRefExpr 0x7fb8af3f1750 <col:14,col:19>
'<pseudo-object type>' lvalue objcproperty Kind=PropertyRef
Property="articleWebView" Messaging=Getter
| | | `-OpaqueValueExpr 0x7fb8af3f1730 <col:14>
'HRiPadArticleViewController *'
| | | `-ImplicitCastExpr 0x7fb8af3f16e8 <col:14>
'HRiPadArticleViewController *' <LValueToRValue>
| | | `-DeclRefExpr 0x7fb8af3f16c0 <col:14>
'HRiPadArticleViewController *const __strong' lvalue ImplicitParam
0x7fb8af3f0dd0 'self' 'HRiPadArticleViewController *const __strong'
| | |-OpaqueValueExpr 0x7fb8af3f1730 <col:14>
'HRiPadArticleViewController *'
| | | `-ImplicitCastExpr 0x7fb8af3f16e8 <col:14>
'HRiPadArticleViewController *' <LValueToRValue>
| | | `-DeclRefExpr 0x7fb8af3f16c0 <col:14>
'HRiPadArticleViewController *const __strong' lvalue ImplicitParam
0x7fb8af3f0dd0 'self' 'HRiPadArticleViewController *const __strong'
| | `-ImplicitCastExpr 0x7fb8af3f17b0 <col:19> 'HRBookendedWebView *'
<ARCReclaimReturnedObject>
| | `-ObjCMessageExpr 0x7fb8af3f1780 <col:19> 'HRBookendedWebView *'
selector=articleWebView
| | `-OpaqueValueExpr 0x7fb8af3f1730 <col:14>
'HRiPadArticleViewController *'
| | `-ImplicitCastExpr 0x7fb8af3f16e8 <col:14>
'HRiPadArticleViewController *' <LValueToRValue>
| | `-DeclRefExpr 0x7fb8af3f16c0 <col:14>
'HRiPadArticleViewController *const __strong' lvalue ImplicitParam
0x7fb8af3f0dd0 'self' 'HRiPadArticleViewController *const __strong'
| `-ImplicitCastExpr 0x7fb8af3f4170 <col:34> 'UIWebView *'
<ARCReclaimReturnedObject>
| `-ObjCMessageExpr 0x7fb8af3f4140 <col:34> 'UIWebView *'
selector=webview
| `-OpaqueValueExpr 0x7fb8af3f40f0 <col:14,col:19>
'HRBookendedWebView *'
| `-PseudoObjectExpr 0x7fb8af3f17c8 <col:14,col:19>
'HRBookendedWebView *'
| |-ObjCPropertyRefExpr 0x7fb8af3f1750 <col:14,col:19>
'<pseudo-object type>' lvalue objcproperty Kind=PropertyRef
Property="articleWebView" Messaging=Getter
| | `-OpaqueValueExpr 0x7fb8af3f1730 <col:14>
'HRiPadArticleViewController *'
| | `-ImplicitCastExpr 0x7fb8af3f16e8 <col:14>
'HRiPadArticleViewController *' <LValueToRValue>
| | `-DeclRefExpr 0x7fb8af3f16c0 <col:14>
'HRiPadArticleViewController *const __strong' lvalue ImplicitParam
0x7fb8af3f0dd0 'self' 'HRiPadArticleViewController *const __strong'
| |-OpaqueValueExpr 0x7fb8af3f1730 <col:14>
'HRiPadArticleViewController *'
| | `-ImplicitCastExpr 0x7fb8af3f16e8 <col:14>
'HRiPadArticleViewController *' <LValueToRValue>
| | `-DeclRefExpr 0x7fb8af3f16c0 <col:14>
'HRiPadArticleViewController *const __strong' lvalue ImplicitParam
0x7fb8af3f0dd0 'self' 'HRiPadArticleViewController *const __strong'
| `-ImplicitCastExpr 0x7fb8af3f17b0 <col:19> 'HRBookendedWebView
*' <ARCReclaimReturnedObject>
| `-ObjCMessageExpr 0x7fb8af3f1780 <col:19> 'HRBookendedWebView
*' selector=articleWebView
| `-OpaqueValueExpr 0x7fb8af3f1730 <col:14>
'HRiPadArticleViewController *'
| `-ImplicitCastExpr 0x7fb8af3f16e8 <col:14>
'HRiPadArticleViewController *' <LValueToRValue>
| `-DeclRefExpr 0x7fb8af3f16c0 <col:14>
'HRiPadArticleViewController *const __strong' lvalue ImplicitParam
0x7fb8af3f0dd0 'self' 'HRiPadArticleViewController *const __strong'
|-ObjCStringLiteral 0x7fb8af3f4058 <col:57,col:58> 'NSString *'
| `-StringLiteral 0x7fb8af3f4030 <col:58> 'char [1]' lvalue ""
`-ImplicitCastExpr 0x7fb8af3f41b0
</Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator8.1.sdk/usr/include/sys/_types.h:52:23,
col:33> 'NSURL *' <NullToPointer>
`-ParenExpr 0x7fb8af3f40d0 <col:23,col:33> 'void *'
`-CStyleCastExpr 0x7fb8af3f40a8 <col:24,col:32> 'void *' <NullToPointer>
`-IntegerLiteral 0x7fb8af3f4078 <col:32> 'int' 0
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