PS: Better toString in a couple of classes.

powershell/ql/lib/semmle/code/powershell/ArrayLiteral.qll

@@ -7,5 +7,5 @@ class ArrayLiteral extends @array_literal, Expr {
 
   Expr getAnElement() { array_literal_element(this, _, result) }
 
-  override string toString() { result = "ArrayLiteral at: " + this.getLocation().toString() }
+  override string toString() { result = "...,..." }
 }

powershell/ql/lib/semmle/code/powershell/BreakStmt.qll

@@ -1,7 +1,7 @@
 import powershell
 
-class BreakStmt extends GotoStmt, Stmt {
+class BreakStmt extends GotoStmt, @break_statement {
   override SourceLocation getLocation() { break_statement_location(this, result) }
 
-  override string toString() { result = "continue" }
+  override string toString() { result = "break" }
 }

powershell/ql/lib/semmle/code/powershell/ContinueStmt.qll

@@ -1,6 +1,6 @@
 import powershell
 
-class ContinueStmt extends GotoStmt, Stmt {
+class ContinueStmt extends GotoStmt, @continue_statement {
   override SourceLocation getLocation() { continue_statement_location(this, result) }
 
   override string toString() { result = "continue" }

powershell/ql/lib/semmle/code/powershell/IfStmt.qll

@@ -9,6 +9,8 @@ class IfStmt extends @if_statement, Stmt {
 
   PipelineBase getCondition(int i) { if_statement_clause(this, i, result, _) } // TODO: Change @ast to @pipeline_base in dbscheme
 
+  PipelineBase getACondition() { result = this.getCondition(_) }
+
   StmtBlock getThen(int i) { if_statement_clause(this, i, _, result) } // TODO: Change @ast to @statement_block in dbscheme
 
   /** ..., if any. */

powershell/ql/lib/semmle/code/powershell/ParamBlock.qll

@@ -1,7 +1,7 @@
 import powershell
 
 class ParamBlock extends @param_block, Ast {
-  override string toString() { result = "ParamBlock" }
+  override string toString() { result = "param(...)" }
 
   override SourceLocation getLocation() { param_block_location(this, result) }
 

powershell/ql/lib/semmle/code/powershell/Pipeline.qll

@@ -1,11 +1,15 @@
 import powershell
 
 class Pipeline extends @pipeline, Chainable {
-  override string toString() { result = "...|..." }
+  override string toString() {
+    if this.getNumberOfComponents() = 1
+    then result = this.getComponent(0).toString()
+    else result = "...|..."
+  }
 
   override SourceLocation getLocation() { pipeline_location(this, result) }
 
-  int getNumComponents() { pipeline(this, result) }
+  int getNumberOfComponents() { result = count(this.getAComponent()) }
 
   CmdBase getComponent(int i) { pipeline_component(this, i, result) }
 

powershell/ql/lib/semmle/code/powershell/ScriptBlock.qll

@@ -1,7 +1,13 @@
 import powershell
 
 class ScriptBlock extends @script_block, Ast {
-  override string toString() { result = this.getLocation().getFile().getBaseName() }
+  predicate isTopLevel() { not exists(this.getParent()) }
+
+  override string toString() {
+    if this.isTopLevel()
+    then result = this.getLocation().getFile().getBaseName()
+    else result = "{...}"
+  }
 
   override SourceLocation getLocation() { script_block_location(this, result) }
 

powershell/ql/lib/semmle/code/powershell/StatementBlock.qll

@@ -15,5 +15,5 @@ class StmtBlock extends @statement_block, Ast {
 
   TrapStmt getATrapStatement() { result = this.getTrapStatement(_) }
 
-  override string toString() { result = "StatementBlock at: " + this.getLocation().toString() }
+  override string toString() { result = "{...}" }
 }

powershell/ql/lib/semmle/code/powershell/TernaryExpression.qll

@@ -10,4 +10,14 @@ class ConditionalExpr extends @ternary_expression, Expr {
   Expr getIfFalse() { ternary_expression(this, _, result, _) }
 
   Expr getIfTrue() { ternary_expression(this, _, _, result) }
+
+  Expr getBranch(boolean value) {
+    value = true and
+    result = this.getIfTrue()
+    or
+    value = false and
+    result = this.getIfFalse()
+  }
+
+  Expr getABranch() { result = this.getBranch(_) }
 }