Merge pull request #19717 from hvitved/rust/use-get-arg-param

Rust: Use `get(An){Arg,Param}` helper predicates

rust/ql/lib/codeql/rust/controlflow/internal/CfgNodes.qll

@@ -59,7 +59,7 @@ class BreakExprTargetChildMapping extends ParentAstNode, Expr {
 }
 
 class CallExprBaseChildMapping extends ParentAstNode, CallExprBase {
-  override predicate relevantChild(AstNode child) { child = this.getArgList().getAnArg() }
+  override predicate relevantChild(AstNode child) { child = this.getAnArg() }
 }
 
 class StructExprChildMapping extends ParentAstNode, StructExpr {

rust/ql/lib/codeql/rust/controlflow/internal/ControlFlowGraphImpl.qll

@@ -87,7 +87,7 @@ class CallableScopeTree extends StandardTree, PreOrderTree, PostOrderTree, Scope
     i = 0 and
     result = this.getParamList().getSelfParam()
     or
-    result = this.getParamList().getParam(i - 1)
+    result = this.getParam(i - 1)
     or
     i = this.getParamList().getNumberOfParams() + 1 and
     result = this.getBody()
@@ -543,7 +543,7 @@ module ExprTrees {
 
   class MethodCallExprTree extends StandardPostOrderTree, MethodCallExpr {
     override AstNode getChildNode(int i) {
-      if i = 0 then result = this.getReceiver() else result = this.getArgList().getArg(i - 1)
+      if i = 0 then result = this.getReceiver() else result = this.getArg(i - 1)
     }
   }
 

rust/ql/lib/codeql/rust/elements/internal/CallExprImpl.qll

@@ -55,7 +55,7 @@ module Impl {
     pragma[nomagic]
     private PathResolution::ItemNode getResolvedFunctionAndPos(int pos) {
       result = getResolvedFunction(this) and
-      exists(this.getArgList().getArg(pos))
+      exists(this.getArg(pos))
     }
 
     /**

rust/ql/lib/codeql/rust/elements/internal/VariableImpl.qll

@@ -95,9 +95,9 @@ module Impl {
       not text.charAt(0).isUppercase() and
       // exclude parameters from functions without a body as these are trait method declarations
       // without implementations
-      not exists(Function f | not f.hasBody() and f.getParamList().getAParam().getPat() = pat) and
+      not exists(Function f | not f.hasBody() and f.getAParam().getPat() = pat) and
       // exclude parameters from function pointer types (e.g. `x` in `fn(x: i32) -> i32`)
-      not exists(FnPtrTypeRepr fp | fp.getParamList().getParam(_).getPat() = pat)
+      not exists(FnPtrTypeRepr fp | fp.getParamList().getAParam().getPat() = pat)
     )
   }
 

rust/ql/lib/codeql/rust/internal/Type.qll

@@ -352,7 +352,7 @@ class SelfTypeParameter extends TypeParameter, TSelfTypeParameter {
 class ImplTraitTypeTypeParameter extends ImplTraitType, TypeParameter {
   private Function function;
 
-  ImplTraitTypeTypeParameter() { impl = function.getParamList().getAParam().getTypeRepr() }
+  ImplTraitTypeTypeParameter() { impl = function.getAParam().getTypeRepr() }
 
   override Function getFunction() { result = function }
 

rust/ql/lib/codeql/rust/internal/TypeInference.qll

@@ -1100,7 +1100,7 @@ private module AwaitExprMatchingInput implements MatchingInputSig {
 
     Type getDeclaredType(DeclarationPosition dpos, TypePath path) {
       dpos.isSelf() and
-      result = this.getParamList().getParam(0).getTypeRepr().(TypeMention).resolveTypeAt(path)
+      result = this.getParam(0).getTypeRepr().(TypeMention).resolveTypeAt(path)
       or
       dpos.isOutput() and
       result = this.getRetType().getTypeRepr().(TypeMention).resolveTypeAt(path)
@@ -1199,7 +1199,7 @@ private module MethodCall {
     Expr receiver;
 
     CallExprMethodCall() {
-      receiver = this.getArgList().getArg(0) and
+      receiver = this.getArg(0) and
       exists(Path path, Function f |
         path = this.getFunction().(PathExpr).getPath() and
         f = resolvePath(path) and

rust/ql/src/utils/modelgenerator/internal/CaptureModels.qll

@@ -79,7 +79,7 @@ module ModelGeneratorCommonInput implements
 
   bindingset[c]
   string paramReturnNodeAsExactOutput(Callable c, DataFlowImpl::ParameterPosition pos) {
-    result = parameterExactAccess(c.getParamList().getParam(pos.getPosition()))
+    result = parameterExactAccess(c.getParam(pos.getPosition()))
     or
     pos.isSelf() and result = qualifierString()
   }