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// RUN: %clang_cc1 -Wchar-subscripts -fsyntax-only -verify %s
void t1(void) {
int array[1] = { 0 };
char subscript = 0;
int val = array[subscript]; // expected-warning{{array subscript is of type 'char'}}
}
void t2(void) {
int array[1] = { 0 };
char subscript = 0;
int val = subscript[array]; // expected-warning{{array subscript is of type 'char'}}
}
void t3(void) {
int *array = 0;
char subscript = 0;
int val = array[subscript]; // expected-warning{{array subscript is of type 'char'}}
}
void t4(void) {
int *array = 0;
char subscript = 0;
int val = subscript[array]; // expected-warning{{array subscript is of type 'char'}}
}
char returnsChar(void);
void t5(void) {
int *array = 0;
int val = array[returnsChar()]; // expected-warning{{array subscript is of type 'char'}}
}
void t6(void) {
int array[1] = { 0 };
signed char subscript = 0;
int val = array[subscript]; // no warning for explicit signed char
}
void t7(void) {
int array[1] = { 0 };
unsigned char subscript = 0;
int val = array[subscript]; // no warning for unsigned char
}
typedef char CharTy;
void t8(void) {
int array[1] = { 0 };
CharTy subscript = 0;
int val = array[subscript]; // expected-warning{{array subscript is of type 'char'}}
}
typedef signed char SignedCharTy;
void t9(void) {
int array[1] = { 0 };
SignedCharTy subscript = 0;
int val = array[subscript]; // no warning for explicit signed char
}
typedef unsigned char UnsignedCharTy;
void t10(void) {
int array[1] = { 0 };
UnsignedCharTy subscript = 0;
int val = array[subscript]; // no warning for unsigned char
}
void t11(void) {
int array[256] = { 0 };
int val = array['a']; // no warning for char with known positive value
}
void t12(void) {
int array[256] = { 0 };
char b = 'a';
int val = array[b]; // expected-warning{{array subscript is of type 'char'}}
}
void t13(void) {
int array[256] = { 0 };
const char b = 'a';
int val = array[b]; // no warning for char with known positive value
}
void t14(void) {
int array[256] = { 0 };
constexpr char b = 'a';
int val = array[b]; // no warning for char with known positive value
}
void t15(void) {
int array[256] = { 0 }; // expected-note {{array 'array' declared here}}
const char b = -1;
// expected-warning@+2 {{array subscript is of type 'char'}}
// expected-warning@+1 {{array index -1 is before the beginning of the array}}
int val = array[b];
}
void t16(void) {
int array[256] = { 0 }; // expected-note {{array 'array' declared here}}
constexpr char b = -1;
// expected-warning@+2 {{array subscript is of type 'char'}}
// expected-warning@+1 {{array index -1 is before the beginning of the array}}
int val = array[b];
}
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