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[java] enhanced 'switch' statements: basic highlighting (IDEA-196643)

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This commit is contained in:
Roman Shevchenko
2018-11-02 18:22:34 +01:00
parent 5ad1d040ec
commit 5d10b37246
7 changed files with 150 additions and 41 deletions
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java/java-tests/testData/codeInsight/daemonCodeAnalyzer/advHighlighting/DuplicateSwitchLabels.java
+2 -2
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@@ -5,9 +5,9 @@ class DuplicateSwitchLabels {
void f(final int i) {
switch (i) {
<error descr="Duplicate default label">default:</error> break;
<error descr="Duplicate default label">default</error>: break;
case 1: break;
<error descr="Duplicate default label">default:</error> break;
<error descr="Duplicate default label">default</error>: break;
}
switch (i) {
java/java-tests/testData/codeInsight/daemonCodeAnalyzer/advHighlighting12/EnhancedSwitchStatements.java
+66
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@@ -0,0 +1,66 @@
import java.util.Random;
class EnhancedSwitchStatements {
static final int FI = 4;
enum E { E1, E2 }
void m(String... args) {
String count;
switch (args.length) {
case 0 -> throw new IllegalStateException("no args");
case 1 -> count = "one";
default -> { count = "many"; }
}
switch (new Random().nextInt()) {
case 0 -> throw new IllegalStateException("no args");
<error descr="Different case kinds used in the switch">break;</error>
}
switch (new Random().nextInt()) {
case 0 -> throw new IllegalStateException("no args");
<error descr="Different case kinds used in the switch">case 1:</error> break;
}
switch (new Random().nextInt()) {
case 0: throw new IllegalStateException("no args"); break;
<error descr="Different case kinds used in the switch">case 1 -> { System.out.println("one"); }</error>
}
{ <error descr="Case statement outside switch">case 11 -> System.out.println("hi there");</error> }
{ <error descr="Case statement outside switch">default -> System.out.println("hi there");</error> }
switch (new Random().nextInt()) {
case 42 -> <error descr="Not a statement">"bingo";</error>
}
switch (new Random().nextInt()) {
<error descr="Duplicate default label">default</error> -> noop();
case 1 -> noop();
<error descr="Duplicate default label">default</error> -> noop();
}
switch (new Random().nextInt()) {
case <error descr="Duplicate label '1'">FI/2 - 1</error> -> noop();
case <error descr="Duplicate label '1'">(1 + 35/16) % 2</error> -> noop();
case FI - 8 -> noop();
}
final byte b = 127;
switch (new Random().nextInt()) {
case <error descr="Duplicate label '127'">b</error> -> System.out.println("b=" + b + ";");
case <error descr="Duplicate label '127'">127</error> -> System.out.println("sweet spot");
}
switch (0) {
case 0 -> noop();
case "\410" == "!0" ? 1 : 0 -> noop();
case "" == "" + "" ? 3 : 0 -> noop();
}
switch (E.valueOf("E1")) {
case <error descr="Constant expression required">null</error> -> noop();
}
}
private static void noop() { }
}
java/java-tests/testData/codeInsight/daemonCodeAnalyzer/advHighlighting6/UnsupportedFeatures.java
+5
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@@ -24,6 +24,11 @@ class UnsupportedFeatures {
switch (<error descr="Incompatible types. Found: 'java.lang.String', required: 'byte, char, short or int'">list.get(0)</error>) {
case "foo": break;
}
switch (list.size()) {
<error descr="Enhanced 'switch' blocks are not supported at language level '6'">case 0 -> throw new IllegalStateException("empty list");</error>
default -> System.out.println("it's okay");
}
}
void f(<error descr="Receiver parameters are not supported at language level '6'">Object this</error>) { }