clang-tools-extra/pseudo/test/glr.cpp

   1 // RUN: clang-pseudo -grammar=cxx -source=%s --print-forest -print-statistics | FileCheck %s
   2
   3 void foo() {
   4   T* a; // a multiply expression or a pointer declaration?
   5 // CHECK:      statement-seq~statement := <ambiguous>
   6 // CHECK-NEXT: ├─statement~expression-statement := expression ;
   7 // CHECK-NEXT: │ ├─expression~multiplicative-expression := multiplicative-expression * pm-expression
   8 // CHECK-NEXT: │ │ ├─multiplicative-expression~IDENTIFIER := tok[5]
   9 // CHECK-NEXT: │ │ ├─* := tok[6]
  10 // CHECK-NEXT: │ │ └─pm-expression~id-expression := unqualified-id #1
  11 // CHECK-NEXT: │ │   └─unqualified-id~IDENTIFIER := tok[7]
  12 // CHECK-NEXT: │ └─; := tok[8]
  13 // CHECK-NEXT: └─statement~simple-declaration := decl-specifier-seq init-declarator-list ;
  14 // CHECK-NEXT:   ├─decl-specifier-seq~simple-type-specifier := <ambiguous>
  15 // CHECK-NEXT:   │ ├─simple-type-specifier~IDENTIFIER := tok[5]
  16 // CHECK-NEXT:   │ └─simple-type-specifier~IDENTIFIER := tok[5]
  17 // CHECK-NEXT:   ├─init-declarator-list~ptr-declarator := ptr-operator ptr-declarator
  18 // CHECK-NEXT:   │ ├─ptr-operator~* := tok[6]
  19 // CHECK-NEXT:   │ └─ptr-declarator~id-expression =#1
  20 // CHECK-NEXT:   └─; := tok[8]
  21 }
  22
  23 // CHECK:      2 Ambiguous nodes:
  24 // CHECK-NEXT: 1 simple-type-specifier
  25 // CHECK-NEXT: 1 statement
  26 // CHECK-EMPTY:
  27 // CHECK-NEXT: 0 Opaque nodes:
  28 // CHECK-EMPTY:
  29 // CHECK-NEXT: Ambiguity: 0.20 misparses/token
  30 // CHECK-NEXT: Unparsed: 0.00%