Update diagnostics for trailing lambdas, add quickfix

Alternative message for errors, caused by unexpected lambda expression arguments on a new line. Both diagnostic are reported, if multiple lambda expressions were passed to the call. For other errors trailing lambda diagnostic overrides the original one. Quickfix for erroneous trailing lambdas on a new line after call. Fix separates lambda expression from previous call with semicolon. All trailing lambda arguments become standalone lambda expressions.
2019-09-18 12:04:42 +03:00
parent f00d609459
commit 6c8e829f19
21 changed files with 390 additions and 9 deletions
@@ -0,0 +1,118 @@
+// !WITH_NEW_INFERENCE
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
+fun noArgs() {}
+fun oneLambdaArg(fn: () -> Unit) {}
+fun twoLambdaArgs(f1: () -> Unit, f2: () -> Unit) {}
+fun varargFn(vararg args: Int) {}
+
+fun testNoArgs() {
+    noArgs()
+    noArgs <!TOO_MANY_ARGUMENTS!>{}<!>
+    noArgs() <!TOO_MANY_ARGUMENTS!>{}<!>
+    noArgs() // {}
+    noArgs() /* */ <!TOO_MANY_ARGUMENTS!>{}<!>
+    noArgs() /*
+        block comment, no new line
+    */ <!TOO_MANY_ARGUMENTS!>{}<!>
+    noArgs()
+    /*
+        block comment with new line
+    */
+    <!UNEXPECTED_TRAILING_LAMBDA_ON_A_NEW_LINE!>{}<!>
+    noArgs() // comment
+    // comment
+    <!UNEXPECTED_TRAILING_LAMBDA_ON_A_NEW_LINE!>{}<!>
+    noArgs() <!TOO_MANY_ARGUMENTS!>{}<!> <!MANY_LAMBDA_EXPRESSION_ARGUMENTS!>{}<!>
+    noArgs() <!TOO_MANY_ARGUMENTS!>{}<!>
+    <!MANY_LAMBDA_EXPRESSION_ARGUMENTS, UNEXPECTED_TRAILING_LAMBDA_ON_A_NEW_LINE!>{}<!>
+}
+
+fun testLambdaArg() {
+    oneLambdaArg(<!NO_VALUE_FOR_PARAMETER!>)<!>
+    oneLambdaArg {}
+    oneLambdaArg()
+    {}
+    oneLambdaArg()
+    {}
+    <!MANY_LAMBDA_EXPRESSION_ARGUMENTS, UNEXPECTED_TRAILING_LAMBDA_ON_A_NEW_LINE!>{}<!>
+    oneLambdaArg(
+        {},
+        <!TOO_MANY_ARGUMENTS!>{}<!>
+    )
+    oneLambdaArg() {}
+    oneLambdaArg(<!NO_VALUE_FOR_PARAMETER!>)<!> // {}
+    oneLambdaArg() /* */ {}
+    oneLambdaArg() /*
+        block
+        comment
+    */ {}
+    oneLambdaArg() // comment
+    // comment
+    {}
+    oneLambdaArg() {}/*
+        block comment, no new line
+    */ <!MANY_LAMBDA_EXPRESSION_ARGUMENTS!>{}<!>
+    oneLambdaArg() {}/*
+        block comment with new line
+    */
+    <!MANY_LAMBDA_EXPRESSION_ARGUMENTS, UNEXPECTED_TRAILING_LAMBDA_ON_A_NEW_LINE!>{}<!>
+    oneLambdaArg() {}// comment
+    // comment
+    <!MANY_LAMBDA_EXPRESSION_ARGUMENTS, UNEXPECTED_TRAILING_LAMBDA_ON_A_NEW_LINE!>{}<!>
+    oneLambdaArg() {} <!MANY_LAMBDA_EXPRESSION_ARGUMENTS!>{}<!>
+    oneLambdaArg() {}
+    <!MANY_LAMBDA_EXPRESSION_ARGUMENTS, UNEXPECTED_TRAILING_LAMBDA_ON_A_NEW_LINE!>{}<!>
+    oneLambdaArg() {} // comment
+    <!MANY_LAMBDA_EXPRESSION_ARGUMENTS, UNEXPECTED_TRAILING_LAMBDA_ON_A_NEW_LINE!>{}<!>
+}
+
+fun testVararg() {
+    varargFn(1,2,3)
+    varargFn <!VARARG_OUTSIDE_PARENTHESES!>{}<!>
+    varargFn(1,2,3) <!VARARG_OUTSIDE_PARENTHESES!>{}<!>
+    varargFn(1,2,3) // {}
+    varargFn(1,2,3) /* */ <!VARARG_OUTSIDE_PARENTHESES!>{}<!>
+    varargFn(1,2,3) /*
+        block comment, no new line
+    */ <!VARARG_OUTSIDE_PARENTHESES!>{}<!>
+    varargFn(1,2,3)
+    /*
+        block comment with new line
+    */ <!UNEXPECTED_TRAILING_LAMBDA_ON_A_NEW_LINE!>{}<!>
+    varargFn(1,2,3) // comment
+    // comment
+    <!UNEXPECTED_TRAILING_LAMBDA_ON_A_NEW_LINE!>{}<!>
+    varargFn(1,2,3) <!VARARG_OUTSIDE_PARENTHESES!>{}<!> <!MANY_LAMBDA_EXPRESSION_ARGUMENTS!>{}<!>
+    varargFn(1,2,3) <!VARARG_OUTSIDE_PARENTHESES!>{}<!>
+    <!MANY_LAMBDA_EXPRESSION_ARGUMENTS, UNEXPECTED_TRAILING_LAMBDA_ON_A_NEW_LINE!>{}<!>
+}
+
+fun testTwoLambdas() {
+    twoLambdaArgs(
+        f1 = {},
+        f2 =
+        {}
+    )
+
+    fun bar(): () -> Unit {
+        twoLambdaArgs(<!NO_VALUE_FOR_PARAMETER!>)<!>
+        {}
+        <!MANY_LAMBDA_EXPRESSION_ARGUMENTS, UNEXPECTED_TRAILING_LAMBDA_ON_A_NEW_LINE!>{}<!>
+
+        return <!NI;TYPE_MISMATCH, NI;TYPE_MISMATCH!>if (true) {
+            <!OI;TYPE_MISMATCH!>twoLambdaArgs({})
+            {}
+            <!MANY_LAMBDA_EXPRESSION_ARGUMENTS, UNEXPECTED_TRAILING_LAMBDA_ON_A_NEW_LINE!>{}<!><!>
+        } else <!NI;TYPE_MISMATCH!>{
+            {}
+        }<!><!>
+    }
+}
+
+fun f1(): (() -> Unit) -> (() -> Unit) -> Unit {
+    return { l1 ->
+        <!NI;TYPE_MISMATCH, TYPE_MISMATCH!>l1()
+        <!UNEXPECTED_TRAILING_LAMBDA_ON_A_NEW_LINE!>{ <!OI;CANNOT_INFER_PARAMETER_TYPE!>l2<!> -> <!OI;DEBUG_INFO_ELEMENT_WITH_ERROR_TYPE!><!NI;FUNCTION_EXPECTED!>l2<!>()<!> }<!><!>
+    }
+}