128 lines
2.9 KiB
Plaintext
128 lines
2.9 KiB
Plaintext
==== tests/cases/conformance/types/typeRelationships/bestCommonType/functionWithMultipleReturnStatements.ts (9 errors) ====
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// return type of a function with multiple returns is the BCT of each return statement
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// it is an error if there is no single BCT, these are error cases
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function f1() {
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~~~~~~~~~~~~~~~
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if (true) {
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~~~~~~~~~~~~~~~
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return 1;
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~~~~~~~~~~~~~~~~~
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} else {
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~~~~~~~~~~~~
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return '';
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~~~~~~~~~~~~~~~~~~
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}
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~~~~~
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}
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~
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!!! No best common type exists among return expressions.
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function f2() {
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~~~~~~~~~~~~~~~
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if (true) {
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~~~~~~~~~~~~~~~
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return 1;
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~~~~~~~~~~~~~~~~~
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} else if (false) {
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~~~~~~~~~~~~~~~~~~~~~~~
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return 2;
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~~~~~~~~~~~~~~~~~
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} else {
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~~~~~~~~~~~~
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return '';
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~~~~~~~~~~~~~~~~~~
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}
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~~~~~
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}
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~
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!!! No best common type exists among return expressions.
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function f3() {
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~~~~~~~~~~~~~~~
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try {
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~~~~~~~~~
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return 1;
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~~~~~~~~~~~~~~~~~
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}
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~~~~~
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catch (e) {
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~~~~~~~~~~~~~~~
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return '';
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~~~~~~~~~~~~~~~~~~
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}
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~~~~~
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}
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~
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!!! No best common type exists among return expressions.
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function f4() {
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~~~~~~~~~~~~~~~
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try {
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~~~~~~~~~
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return 1;
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~~~~~~~~~~~~~~~~~
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}
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~~~~~
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catch (e) {
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~~~~~~~~~~~~~~~
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}
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~~~~~
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finally {
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~~~~~~~~~~~~~
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return '';
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~~~~~~~~~~~~~~~~~~
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}
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~~~~~
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}
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~
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!!! No best common type exists among return expressions.
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function f5() {
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~~~~~~~~~~~~~~~
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return 1;
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~~~~~~~~~~~~~
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return '';
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~~~~~~~~~~~~~~
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}
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~
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!!! No best common type exists among return expressions.
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function f6<T, U>(x: T, y:U) {
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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if (true) {
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~~~~~~~~~~~~~~~
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return x;
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~~~~~~~~~~~~~~~~~
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} else {
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~~~~~~~~~~~~
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return y;
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~~~~~~~~~~~~~~~~~
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}
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~~~~~
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}
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~
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!!! No best common type exists among return expressions.
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function f8<T extends U, U extends V, V>(x: T, y: U) {
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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~~~~~~~~~~~
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!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
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~~~~~~~~~~~
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!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
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if (true) {
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~~~~~~~~~~~~~~~
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return x;
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~~~~~~~~~~~~~~~~~
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} else {
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~~~~~~~~~~~~
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return y;
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~~~~~~~~~~~~~~~~~
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}
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~~~~~
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}
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~
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!!! No best common type exists among return expressions.
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