327 lines
9.9 KiB
Plaintext
327 lines
9.9 KiB
Plaintext
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============================================
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If statements
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============================================
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int main() {
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if (a)
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1;
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if (!a) {
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2;
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} else {
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3;
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}
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}
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---
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(translation_unit
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(function_definition
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(primitive_type)
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(function_declarator (identifier) (parameter_list))
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(compound_statement
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(if_statement (parenthesized_expression (identifier))
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(expression_statement (number_literal)))
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(if_statement (parenthesized_expression (unary_expression (identifier)))
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(compound_statement
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(expression_statement (number_literal)))
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(compound_statement
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(expression_statement (number_literal)))))))
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============================================
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For loops
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============================================
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int main() {
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for (;;)
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1;
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for (int i = 0; i < 5; next(), i++) {
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2;
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}
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for (start(); check(); step())
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3;
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for (i = 0, j = 0, k = 0, l = 0; i < 1, j < 1; i++, j++, k++, l++)
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1;
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}
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---
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(translation_unit
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(function_definition
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(primitive_type)
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(function_declarator (identifier) (parameter_list))
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(compound_statement
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(for_statement
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(expression_statement (number_literal)))
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(for_statement
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(declaration (primitive_type) (init_declarator (identifier) (number_literal)))
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(binary_expression (identifier) (number_literal))
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(comma_expression
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(call_expression (identifier) (argument_list))
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(update_expression (identifier)))
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(compound_statement (expression_statement (number_literal))))
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(for_statement
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(call_expression (identifier) (argument_list))
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(call_expression (identifier) (argument_list))
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(call_expression (identifier) (argument_list))
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(expression_statement (number_literal)))
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(for_statement
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(comma_expression
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(assignment_expression (identifier) (number_literal))
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(comma_expression
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(assignment_expression (identifier) (number_literal))
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(comma_expression
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(assignment_expression (identifier) (number_literal))
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(assignment_expression (identifier) (number_literal)))))
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(comma_expression
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(binary_expression
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(identifier)
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(number_literal))
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(binary_expression
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(identifier)
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(number_literal)))
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(comma_expression
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(update_expression (identifier))
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(comma_expression
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(update_expression (identifier))
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(comma_expression
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(update_expression (identifier))
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(update_expression (identifier)))))
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(expression_statement (number_literal))))))
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============================================
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While loops
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============================================
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int main() {
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while (x)
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printf("hi");
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}
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---
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(translation_unit
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(function_definition
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(primitive_type)
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(function_declarator (identifier) (parameter_list))
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(compound_statement
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(while_statement (parenthesized_expression (identifier))
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(expression_statement (call_expression
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(identifier)
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(argument_list (string_literal))))))))
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============================================
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Labeled statements
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============================================
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void foo(T *t) {
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recur:
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t = t->next();
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if (t) goto recur;
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}
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---
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(translation_unit
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(function_definition
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(primitive_type)
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(function_declarator (identifier) (parameter_list
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(parameter_declaration (type_identifier) (pointer_declarator (identifier)))))
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(compound_statement
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(labeled_statement (statement_identifier)
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(expression_statement (assignment_expression
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(identifier)
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(call_expression (field_expression (identifier) (field_identifier)) (argument_list)))))
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(if_statement (parenthesized_expression (identifier)) (goto_statement (statement_identifier))))))
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============================================
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Switch statements
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============================================
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void foo(int a) {
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switch (a) {
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puts("entered switch!");
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case 3:
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case 5:
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if (b) {
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c();
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}
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break;
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default:
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c();
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break;
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}
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}
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---
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(translation_unit
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(function_definition
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(primitive_type)
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(function_declarator (identifier) (parameter_list
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(parameter_declaration (primitive_type) (identifier))))
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(compound_statement
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(switch_statement
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(parenthesized_expression (identifier))
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(compound_statement
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(expression_statement (call_expression (identifier) (argument_list (string_literal))))
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(case_statement (number_literal))
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(case_statement (number_literal)
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(if_statement
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(parenthesized_expression (identifier))
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(compound_statement (expression_statement (call_expression (identifier) (argument_list)))))
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(break_statement))
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(case_statement
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(expression_statement (call_expression (identifier) (argument_list)))
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(break_statement)))))))
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============================================
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Case statements separate from switch statements
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============================================
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int main() {
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switch (count % 8) {
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case 0:
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do {
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*to = *from++;
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case 2: *to = *from++;
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case 1: *to = *from++;
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} while (--n > 0);
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}
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}
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---
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(translation_unit
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(function_definition
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(primitive_type)
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(function_declarator (identifier) (parameter_list))
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(compound_statement
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(switch_statement
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(parenthesized_expression (binary_expression (identifier) (number_literal)))
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(compound_statement
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(case_statement (number_literal)
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(do_statement
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(compound_statement
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(expression_statement (assignment_expression
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(pointer_expression (identifier))
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(pointer_expression (update_expression (identifier)))))
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(case_statement (number_literal)
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(expression_statement (assignment_expression
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(pointer_expression (identifier))
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(pointer_expression (update_expression (identifier))))))
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(case_statement (number_literal)
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(expression_statement (assignment_expression
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(pointer_expression (identifier))
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(pointer_expression (update_expression (identifier)))))))
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(parenthesized_expression (binary_expression (update_expression (identifier)) (number_literal))))))))))
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============================================
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Return statements
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============================================
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void foo() {
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return;
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return a;
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return a, b;
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}
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---
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(translation_unit
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(function_definition
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(primitive_type)
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(function_declarator (identifier) (parameter_list))
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(compound_statement
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(return_statement)
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(return_statement (identifier))
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(return_statement (comma_expression (identifier) (identifier))))))
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============================================
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Comments with asterisks
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============================================
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/*************************
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* odd number of asterisks
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*************************/
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int a;
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/**************************
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* even number of asterisks
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**************************/
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int b;
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---
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(translation_unit
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(comment)
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(declaration (primitive_type) (identifier))
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(comment)
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(declaration (primitive_type) (identifier)))
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============================================
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Attributes
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============================================
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void f() {
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[[a]] switch (b) {
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[[c]] case 1: {}
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case 2:
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[[fallthrough]];
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default:
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}
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[[a]] while (true) {}
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[[a]] if (true) {}
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[[a]] for (;;) {}
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[[a]] return;
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[[a]] a;
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[[a]];
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[[a]] label: {}
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[[a]] goto label;
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// these are c++ specific, but their bind locations should be c-compatible
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if (true) [[likely]] {} else [[unlikely]] {}
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do [[likely]] {} while (true);
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}
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---
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(translation_unit
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(function_definition (primitive_type)
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(function_declarator (identifier) (parameter_list))
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(compound_statement
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(attributed_statement
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(attribute_declaration (attribute (identifier)))
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(switch_statement
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(parenthesized_expression (identifier))
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(compound_statement
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(attributed_statement
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(attribute_declaration (attribute (identifier)))
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(case_statement (number_literal) (compound_statement)))
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(case_statement (number_literal)
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(attributed_statement
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(attribute_declaration (attribute (identifier)))
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(expression_statement)))
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(case_statement))))
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(attributed_statement (attribute_declaration (attribute (identifier))) (while_statement (parenthesized_expression (true)) (compound_statement)))
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(attributed_statement (attribute_declaration (attribute (identifier))) (if_statement (parenthesized_expression (true)) (compound_statement)))
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(attributed_statement (attribute_declaration (attribute (identifier))) (for_statement (compound_statement)))
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(attributed_statement (attribute_declaration (attribute (identifier))) (return_statement))
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(attributed_statement (attribute_declaration (attribute (identifier))) (expression_statement (identifier)))
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(attributed_statement (attribute_declaration (attribute (identifier))) (expression_statement))
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(attributed_statement (attribute_declaration (attribute (identifier))) (labeled_statement (statement_identifier) (compound_statement)))
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(attributed_statement (attribute_declaration (attribute (identifier))) (goto_statement (statement_identifier)))
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(comment)
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(if_statement
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(parenthesized_expression (true))
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(attributed_statement (attribute_declaration (attribute (identifier))) (compound_statement))
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(attributed_statement (attribute_declaration (attribute (identifier))) (compound_statement)))
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(do_statement
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(attributed_statement (attribute_declaration (attribute (identifier))) (compound_statement))
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(parenthesized_expression (true))))))
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