static unsigned get_expression_precedence(expression_kind_t kind)
{
static const unsigned prec[] = {
- [EXPR_ERROR] = PREC_PRIMARY,
- [EXPR_REFERENCE] = PREC_PRIMARY,
- [EXPR_ENUM_CONSTANT] = PREC_PRIMARY,
- [EXPR_LITERAL_INTEGER] = PREC_PRIMARY,
- [EXPR_LITERAL_FLOATINGPOINT] = PREC_PRIMARY,
- [EXPR_LITERAL_FLOATINGPOINT_HEXADECIMAL] = PREC_PRIMARY,
- [EXPR_LITERAL_CHARACTER] = PREC_PRIMARY,
- [EXPR_LITERAL_WIDE_CHARACTER] = PREC_PRIMARY,
- [EXPR_LITERAL_MS_NOOP] = PREC_PRIMARY,
- [EXPR_STRING_LITERAL] = PREC_PRIMARY,
- [EXPR_WIDE_STRING_LITERAL] = PREC_PRIMARY,
- [EXPR_COMPOUND_LITERAL] = PREC_UNARY,
- [EXPR_CALL] = PREC_POSTFIX,
- [EXPR_CONDITIONAL] = PREC_CONDITIONAL,
- [EXPR_SELECT] = PREC_POSTFIX,
- [EXPR_ARRAY_ACCESS] = PREC_POSTFIX,
- [EXPR_SIZEOF] = PREC_UNARY,
- [EXPR_CLASSIFY_TYPE] = PREC_UNARY,
- [EXPR_ALIGNOF] = PREC_UNARY,
-
- [EXPR_FUNCNAME] = PREC_PRIMARY,
- [EXPR_BUILTIN_CONSTANT_P] = PREC_PRIMARY,
- [EXPR_BUILTIN_TYPES_COMPATIBLE_P] = PREC_PRIMARY,
- [EXPR_OFFSETOF] = PREC_PRIMARY,
- [EXPR_VA_START] = PREC_PRIMARY,
- [EXPR_VA_ARG] = PREC_PRIMARY,
- [EXPR_VA_COPY] = PREC_PRIMARY,
- [EXPR_STATEMENT] = PREC_PRIMARY,
- [EXPR_LABEL_ADDRESS] = PREC_PRIMARY,
-
- [EXPR_UNARY_NEGATE] = PREC_UNARY,
- [EXPR_UNARY_PLUS] = PREC_UNARY,
- [EXPR_UNARY_BITWISE_NEGATE] = PREC_UNARY,
- [EXPR_UNARY_NOT] = PREC_UNARY,
- [EXPR_UNARY_DEREFERENCE] = PREC_UNARY,
- [EXPR_UNARY_TAKE_ADDRESS] = PREC_UNARY,
- [EXPR_UNARY_POSTFIX_INCREMENT] = PREC_POSTFIX,
- [EXPR_UNARY_POSTFIX_DECREMENT] = PREC_POSTFIX,
- [EXPR_UNARY_PREFIX_INCREMENT] = PREC_UNARY,
- [EXPR_UNARY_PREFIX_DECREMENT] = PREC_UNARY,
- [EXPR_UNARY_CAST] = PREC_UNARY,
- [EXPR_UNARY_ASSUME] = PREC_PRIMARY,
- [EXPR_UNARY_DELETE] = PREC_UNARY,
- [EXPR_UNARY_DELETE_ARRAY] = PREC_UNARY,
- [EXPR_UNARY_THROW] = PREC_ASSIGNMENT,
-
- [EXPR_BINARY_ADD] = PREC_ADDITIVE,
- [EXPR_BINARY_SUB] = PREC_ADDITIVE,
- [EXPR_BINARY_MUL] = PREC_MULTIPLICATIVE,
- [EXPR_BINARY_DIV] = PREC_MULTIPLICATIVE,
- [EXPR_BINARY_MOD] = PREC_MULTIPLICATIVE,
- [EXPR_BINARY_EQUAL] = PREC_EQUALITY,
- [EXPR_BINARY_NOTEQUAL] = PREC_EQUALITY,
- [EXPR_BINARY_LESS] = PREC_RELATIONAL,
- [EXPR_BINARY_LESSEQUAL] = PREC_RELATIONAL,
- [EXPR_BINARY_GREATER] = PREC_RELATIONAL,
- [EXPR_BINARY_GREATEREQUAL] = PREC_RELATIONAL,
- [EXPR_BINARY_BITWISE_AND] = PREC_AND,
- [EXPR_BINARY_BITWISE_OR] = PREC_OR,
- [EXPR_BINARY_BITWISE_XOR] = PREC_XOR,
- [EXPR_BINARY_LOGICAL_AND] = PREC_LOGICAL_AND,
- [EXPR_BINARY_LOGICAL_OR] = PREC_LOGICAL_OR,
- [EXPR_BINARY_SHIFTLEFT] = PREC_SHIFT,
- [EXPR_BINARY_SHIFTRIGHT] = PREC_SHIFT,
- [EXPR_BINARY_ASSIGN] = PREC_ASSIGNMENT,
- [EXPR_BINARY_MUL_ASSIGN] = PREC_ASSIGNMENT,
- [EXPR_BINARY_DIV_ASSIGN] = PREC_ASSIGNMENT,
- [EXPR_BINARY_MOD_ASSIGN] = PREC_ASSIGNMENT,
- [EXPR_BINARY_ADD_ASSIGN] = PREC_ASSIGNMENT,
- [EXPR_BINARY_SUB_ASSIGN] = PREC_ASSIGNMENT,
- [EXPR_BINARY_SHIFTLEFT_ASSIGN] = PREC_ASSIGNMENT,
- [EXPR_BINARY_SHIFTRIGHT_ASSIGN] = PREC_ASSIGNMENT,
- [EXPR_BINARY_BITWISE_AND_ASSIGN] = PREC_ASSIGNMENT,
- [EXPR_BINARY_BITWISE_XOR_ASSIGN] = PREC_ASSIGNMENT,
- [EXPR_BINARY_BITWISE_OR_ASSIGN] = PREC_ASSIGNMENT,
- [EXPR_BINARY_COMMA] = PREC_EXPRESSION,
-
- [EXPR_BINARY_ISGREATER] = PREC_PRIMARY,
- [EXPR_BINARY_ISGREATEREQUAL] = PREC_PRIMARY,
- [EXPR_BINARY_ISLESS] = PREC_PRIMARY,
- [EXPR_BINARY_ISLESSEQUAL] = PREC_PRIMARY,
- [EXPR_BINARY_ISLESSGREATER] = PREC_PRIMARY,
- [EXPR_BINARY_ISUNORDERED] = PREC_PRIMARY
+ [EXPR_ERROR] = PREC_PRIMARY,
+ [EXPR_REFERENCE] = PREC_PRIMARY,
+ [EXPR_ENUM_CONSTANT] = PREC_PRIMARY,
+ [EXPR_LITERAL_INTEGER] = PREC_PRIMARY,
+ [EXPR_LITERAL_FLOATINGPOINT] = PREC_PRIMARY,
+ [EXPR_LITERAL_CHARACTER] = PREC_PRIMARY,
+ [EXPR_LITERAL_WIDE_CHARACTER] = PREC_PRIMARY,
+ [EXPR_LITERAL_MS_NOOP] = PREC_PRIMARY,
+ [EXPR_STRING_LITERAL] = PREC_PRIMARY,
+ [EXPR_WIDE_STRING_LITERAL] = PREC_PRIMARY,
+ [EXPR_COMPOUND_LITERAL] = PREC_UNARY,
+ [EXPR_CALL] = PREC_POSTFIX,
+ [EXPR_CONDITIONAL] = PREC_CONDITIONAL,
+ [EXPR_SELECT] = PREC_POSTFIX,
+ [EXPR_ARRAY_ACCESS] = PREC_POSTFIX,
+ [EXPR_SIZEOF] = PREC_UNARY,
+ [EXPR_CLASSIFY_TYPE] = PREC_UNARY,
+ [EXPR_ALIGNOF] = PREC_UNARY,
+
+ [EXPR_FUNCNAME] = PREC_PRIMARY,
+ [EXPR_BUILTIN_CONSTANT_P] = PREC_PRIMARY,
+ [EXPR_BUILTIN_TYPES_COMPATIBLE_P] = PREC_PRIMARY,
+ [EXPR_OFFSETOF] = PREC_PRIMARY,
+ [EXPR_VA_START] = PREC_PRIMARY,
+ [EXPR_VA_ARG] = PREC_PRIMARY,
+ [EXPR_VA_COPY] = PREC_PRIMARY,
+ [EXPR_STATEMENT] = PREC_PRIMARY,
+ [EXPR_LABEL_ADDRESS] = PREC_PRIMARY,
+
+ [EXPR_UNARY_NEGATE] = PREC_UNARY,
+ [EXPR_UNARY_PLUS] = PREC_UNARY,
+ [EXPR_UNARY_BITWISE_NEGATE] = PREC_UNARY,
+ [EXPR_UNARY_NOT] = PREC_UNARY,
+ [EXPR_UNARY_DEREFERENCE] = PREC_UNARY,
+ [EXPR_UNARY_TAKE_ADDRESS] = PREC_UNARY,
+ [EXPR_UNARY_POSTFIX_INCREMENT] = PREC_POSTFIX,
+ [EXPR_UNARY_POSTFIX_DECREMENT] = PREC_POSTFIX,
+ [EXPR_UNARY_PREFIX_INCREMENT] = PREC_UNARY,
+ [EXPR_UNARY_PREFIX_DECREMENT] = PREC_UNARY,
+ [EXPR_UNARY_CAST] = PREC_UNARY,
+ [EXPR_UNARY_ASSUME] = PREC_PRIMARY,
+ [EXPR_UNARY_DELETE] = PREC_UNARY,
+ [EXPR_UNARY_DELETE_ARRAY] = PREC_UNARY,
+ [EXPR_UNARY_THROW] = PREC_ASSIGNMENT,
+
+ [EXPR_BINARY_ADD] = PREC_ADDITIVE,
+ [EXPR_BINARY_SUB] = PREC_ADDITIVE,
+ [EXPR_BINARY_MUL] = PREC_MULTIPLICATIVE,
+ [EXPR_BINARY_DIV] = PREC_MULTIPLICATIVE,
+ [EXPR_BINARY_MOD] = PREC_MULTIPLICATIVE,
+ [EXPR_BINARY_EQUAL] = PREC_EQUALITY,
+ [EXPR_BINARY_NOTEQUAL] = PREC_EQUALITY,
+ [EXPR_BINARY_LESS] = PREC_RELATIONAL,
+ [EXPR_BINARY_LESSEQUAL] = PREC_RELATIONAL,
+ [EXPR_BINARY_GREATER] = PREC_RELATIONAL,
+ [EXPR_BINARY_GREATEREQUAL] = PREC_RELATIONAL,
+ [EXPR_BINARY_BITWISE_AND] = PREC_AND,
+ [EXPR_BINARY_BITWISE_OR] = PREC_OR,
+ [EXPR_BINARY_BITWISE_XOR] = PREC_XOR,
+ [EXPR_BINARY_LOGICAL_AND] = PREC_LOGICAL_AND,
+ [EXPR_BINARY_LOGICAL_OR] = PREC_LOGICAL_OR,
+ [EXPR_BINARY_SHIFTLEFT] = PREC_SHIFT,
+ [EXPR_BINARY_SHIFTRIGHT] = PREC_SHIFT,
+ [EXPR_BINARY_ASSIGN] = PREC_ASSIGNMENT,
+ [EXPR_BINARY_MUL_ASSIGN] = PREC_ASSIGNMENT,
+ [EXPR_BINARY_DIV_ASSIGN] = PREC_ASSIGNMENT,
+ [EXPR_BINARY_MOD_ASSIGN] = PREC_ASSIGNMENT,
+ [EXPR_BINARY_ADD_ASSIGN] = PREC_ASSIGNMENT,
+ [EXPR_BINARY_SUB_ASSIGN] = PREC_ASSIGNMENT,
+ [EXPR_BINARY_SHIFTLEFT_ASSIGN] = PREC_ASSIGNMENT,
+ [EXPR_BINARY_SHIFTRIGHT_ASSIGN] = PREC_ASSIGNMENT,
+ [EXPR_BINARY_BITWISE_AND_ASSIGN] = PREC_ASSIGNMENT,
+ [EXPR_BINARY_BITWISE_XOR_ASSIGN] = PREC_ASSIGNMENT,
+ [EXPR_BINARY_BITWISE_OR_ASSIGN] = PREC_ASSIGNMENT,
+ [EXPR_BINARY_COMMA] = PREC_EXPRESSION,
+
+ [EXPR_BINARY_ISGREATER] = PREC_PRIMARY,
+ [EXPR_BINARY_ISGREATEREQUAL] = PREC_PRIMARY,
+ [EXPR_BINARY_ISLESS] = PREC_PRIMARY,
+ [EXPR_BINARY_ISLESSEQUAL] = PREC_PRIMARY,
+ [EXPR_BINARY_ISLESSGREATER] = PREC_PRIMARY,
+ [EXPR_BINARY_ISUNORDERED] = PREC_PRIMARY
};
assert((size_t)kind < lengthof(prec));
unsigned res = prec[kind];
case EXPR_LITERAL_BOOLEAN:
case EXPR_LITERAL_FLOATINGPOINT:
- case EXPR_LITERAL_FLOATINGPOINT_HEXADECIMAL:
case EXPR_LITERAL_INTEGER:
print_stringrep(&literal->value);
print_stringrep(&literal->suffix);
print_char(')');
}
+static bool needs_parentheses(expression_t const *const expr, unsigned const top_prec)
+{
+ if (expr->base.parenthesized)
+ return true;
+
+ if (top_prec > get_expression_precedence(expr->base.kind))
+ return true;
+
+ if (print_parenthesis && top_prec != PREC_BOTTOM) {
+ switch (expr->kind) {
+ case EXPR_ENUM_CONSTANT:
+ case EXPR_FUNCNAME:
+ case EXPR_LITERAL_CASES:
+ case EXPR_REFERENCE:
+ case EXPR_STRING_LITERAL:
+ case EXPR_WIDE_STRING_LITERAL:
+ /* Do not print () around subexpressions consisting of a single token. */
+ return false;
+
+ default:
+ return true;
+ }
+ }
+
+ return false;
+}
+
/**
* Prints an expression with parenthesis if needed.
*
expr = expr->unary.value;
}
- bool parenthesized =
- expr->base.parenthesized ||
- (print_parenthesis && top_prec != PREC_BOTTOM) ||
- top_prec > get_expression_precedence(expr->base.kind);
+ bool const parenthesized = needs_parentheses(expr, top_prec);
if (parenthesized)
print_char('(');
projects / cparser / blobdiff