destructuring-variable-declarations.js (3339B)
1 // |reftest| slow skip-if(!xulRuntime.shell) 2 function test() { 3 4 function testVarPatternCombinations(makePattSrc, makePattPatt) { 5 var pattSrcs = makePatternCombinations(n => ("x" + n), makePattSrc); 6 var pattPatts = makePatternCombinations(n => ({ id: ident("x" + n), init: null }), makePattPatt); 7 // It's illegal to have uninitialized const declarations, so we need a 8 // separate set of patterns and sources. 9 var constSrcs = makePatternCombinations(n => ("x" + n + " = undefined"), makePattSrc); 10 var constPatts = makePatternCombinations(n => ({ id: ident("x" + n), init: ident("undefined") }), makePattPatt); 11 12 for (var i = 0; i < pattSrcs.length; i++) { 13 // variable declarations in blocks 14 assertDecl("var " + pattSrcs[i].join(",") + ";", varDecl(pattPatts[i])); 15 16 assertGlobalDecl("let " + pattSrcs[i].join(",") + ";", letDecl(pattPatts[i])); 17 assertLocalDecl("let " + pattSrcs[i].join(",") + ";", letDecl(pattPatts[i])); 18 assertBlockDecl("let " + pattSrcs[i].join(",") + ";", letDecl(pattPatts[i])); 19 20 assertDecl("const " + constSrcs[i].join(",") + ";", constDecl(constPatts[i])); 21 22 // variable declarations in for-loop heads 23 assertStmt("for (var " + pattSrcs[i].join(",") + "; foo; bar);", 24 forStmt(varDecl(pattPatts[i]), ident("foo"), ident("bar"), emptyStmt)); 25 assertStmt("for (let " + pattSrcs[i].join(",") + "; foo; bar);", 26 forStmt(letDecl(pattPatts[i]), ident("foo"), ident("bar"), emptyStmt)); 27 assertStmt("for (const " + constSrcs[i].join(",") + "; foo; bar);", 28 forStmt(constDecl(constPatts[i]), ident("foo"), ident("bar"), emptyStmt)); 29 } 30 } 31 32 testVarPatternCombinations(n => ("{a" + n + ":x" + n + "," + "b" + n + ":y" + n + "," + "c" + n + ":z" + n + "} = 0"), 33 n => ({ id: objPatt([assignProp("a" + n, ident("x" + n)), 34 assignProp("b" + n, ident("y" + n)), 35 assignProp("c" + n, ident("z" + n))]), 36 init: lit(0) })); 37 38 testVarPatternCombinations(n => ("{a" + n + ":x" + n + " = 10," + "b" + n + ":y" + n + " = 10," + "c" + n + ":z" + n + " = 10} = 0"), 39 n => ({ id: objPatt([assignProp("a" + n, ident("x" + n), lit(10)), 40 assignProp("b" + n, ident("y" + n), lit(10)), 41 assignProp("c" + n, ident("z" + n), lit(10))]), 42 init: lit(0) })); 43 44 testVarPatternCombinations(n => ("[x" + n + "," + "y" + n + "," + "z" + n + "] = 0"), 45 n => ({ id: arrPatt([assignElem("x" + n), assignElem("y" + n), assignElem("z" + n)]), 46 init: lit(0) })); 47 48 testVarPatternCombinations(n => ("[a" + n + ", ..." + "b" + n + "] = 0"), 49 n => ({ id: arrPatt([assignElem("a" + n), spread(ident("b" + n))]), 50 init: lit(0) })); 51 52 testVarPatternCombinations(n => ("[a" + n + ", " + "b" + n + " = 10] = 0"), 53 n => ({ id: arrPatt([assignElem("a" + n), assignElem("b" + n, lit(10))]), 54 init: lit(0) })); 55 56 } 57 58 runtest(test);