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Eric Milles reassigned GROOVY-8566: ----------------------------------- Assignee: (was: Eric Milles) > Array initialization from list literal without "as" should be supported under > static compilation for multi-dimension arrays > --------------------------------------------------------------------------------------------------------------------------- > > Key: GROOVY-8566 > URL: https://issues.apache.org/jira/browse/GROOVY-8566 > Project: Groovy > Issue Type: Improvement > Components: Compiler > Affects Versions: 2.4.15 > Reporter: mgroovy > Priority: Major > Labels: CompileStatic, array, initialization > > Dynamic Groovy supports initializing an array from a list literal: > {code:java} > @Test > @Ignore > void arrayFromListLiteral() { > int[] a0 = [1,2,3] > int[][] aa0 = [[1,2,3],[4,5,6]] > int[][][] aaa0 = [[[1],[2],[3]],[[4],[5],[6]]] > int[][][] aaa1 = [[1,2,3],[4,5,6]] > int[][][] aaa2 = [1,2,3,4,5,6] > int[][][] aaa3 = 1 > println "a0=$a0" > println "aa0=$aa0" > println "aaa0=$aaa0" > println "aaa1=$aaa1" > println "aaa2=$aaa2" > println "aaa3=$aaa3" > assert a0 instanceof int[] > assert aa0 instanceof int[][] > assert aaa0 instanceof int[][][] > assert aaa1 instanceof int[][][] > assert aaa2 instanceof int[][][] > assert aaa3 instanceof int[][][] > } > {code} > gives: > a0=[1, 2, 3] > aa0=[[1, 2, 3], [4, 5, 6]] > aaa0=[[[1], [2], [3]], [[4], [5], [6]]] > aaa1=[[[1], [2], [3]], [[4], [5], [6]]] > aaa2=[[[1]], [[2]], [[3]], [[4]], [[5]], [[6]]] > aaa3=[[[1]]] > Using @CompileStatic on the test the compiler gives: > {code:java} > Error:(37, 19) Groovyc: [Static type checking] - Cannot assign value of type > java.util.List <java.lang.Integer> into array of type int[][] > Error:(38, 22) Groovyc: [Static type checking] - Cannot assign value of type > java.util.List <java.util.List> into array of type int[][][] > Error:(39, 22) Groovyc: [Static type checking] - Cannot assign value of type > java.util.List <java.lang.Integer> into array of type int[][][] > Error:(40, 22) Groovyc: [Static type checking] - Cannot assign value of type > int into array of type int[][][] > Error:(41, 22) Groovyc: [Static type checking] - Cannot assign value of type > int to variable of type int[][][] > {code} > Adding the "as" operator: > {code:java} > @Test > @Ignore > void arrayFromListLiteral() { > int[] a0 = [1,2,3] > int[][] aa0 = [[1,2,3],[4,5,6]] as int[][] > int[][][] aaa0 = [[[1],[2],[3]],[[4],[5],[6]]] as int[][][] > // etc > } > {code} > makes the code work the same as in the dynamic case. > In light of the upcoming Groovy 3.0 support for Java-style curly-braces > literal array syntax, it would be good to support the idiomatic Groovy array > initialization syntax also for the static compilation case. > An additonal question would be, whether in the static case the automatic > conversion of the RHS expression to fit the LHS array type should be less > lenient, i.e. the list structure should be required to conform to the array > dimensions given on the left ? -- This message was sent by Atlassian Jira (v8.20.10#820010)