Add missing linter metadata for stdlib.

Fixes google#483.

Author: sbarzowski

linter/internal/types/stdlib.go

@@ -31,11 +31,21 @@ func prepareStdlib(g *typeGraph) {
 		"length":          g.newSimpleFuncType(numberType, "x"),
 		"objectHas":       g.newSimpleFuncType(boolType, "o", "f"),
 		"objectFields":    g.newSimpleFuncType(arrayOfString, "o"),
+		"objectValues":    g.newSimpleFuncType(anyArrayType, "o"),
 		"objectHasAll":    g.newSimpleFuncType(boolType, "o", "f"),
 		"objectFieldsAll": g.newSimpleFuncType(arrayOfString, "o"),
+		"objectValuesAll": g.newSimpleFuncType(anyArrayType, "o"),
 		"prune":           g.newSimpleFuncType(anyObjectType, "a"),
 		"mapWithKey":      g.newSimpleFuncType(anyObjectType, "func", "obj"),
 
+		// isSomething
+		"isArray":    g.newSimpleFuncType(boolType, "v"),
+		"isBoolean":  g.newSimpleFuncType(boolType, "v"),
+		"isFunction": g.newSimpleFuncType(boolType, "v"),
+		"isNumber":   g.newSimpleFuncType(boolType, "v"),
+		"isObject":   g.newSimpleFuncType(boolType, "v"),
+		"isString":   g.newSimpleFuncType(boolType, "v"),
+
 		// Mathematical utilities
 		"abs":      g.newSimpleFuncType(numberType, "n"),
 		"sign":     g.newSimpleFuncType(numberType, "n"),

linter/testdata/stdlib_return_type_test.jsonnet

@@ -0,0 +1 @@
+!std.setMember([1, 2, 3], 1)

linter/testdata/stdlib_return_type_test.linter.golden

@@ -78,6 +78,12 @@
       4
    ],
    "format": "test blah 42",
+   "isArray": true,
+   "isBoolean": true,
+   "isFunction": true,
+   "isNumber": true,
+   "isObject": true,
+   "isString": true,
    "join": "a,b,c",
    "length": 0,
    "lines": "a\nb\nc\n",
@@ -115,8 +121,11 @@
    "mergePatch": { },
    "min": 2,
    "objectFields": [ ],
+   "objectFieldsAll": [ ],
    "objectHas": false,
    "objectHasAll": false,
+   "objectValues": [ ],
+   "objectValuesAll": [ ],
    "parseHex": 3735928559,
    "parseInt": 42,
    "parseJson": {

testdata/stdlib_smoke_test.golden

@@ -15,10 +15,21 @@
     length: std.length(x=[]),
     objectHas: std.objectHas(o={}, f="fieldname"),
     objectFields: std.objectFields(o={}),
+    objectValues: std.objectValues(o={}),
     objectHasAll: std.objectHasAll(o={}, f="fieldname"),
+    objectFieldsAll: std.objectFieldsAll(o={}),
+    objectValuesAll: std.objectValuesAll(o={}),
     prune: std.prune(a={x: null, y: [null, "42"]}),
     mapWithKey: std.mapWithKey(func=function(key, value) 42, obj={a: 17}),
 
+    // isSomething
+    isArray: std.isArray(v=[]),
+    isBoolean: std.isBoolean(v=true),
+    isFunction: std.isFunction(v=function() 42),
+    isNumber: std.isNumber(v=42),
+    isObject: std.isObject(v={}),
+    isString: std.isString(v=""),
+
     // Mathematical utilities
     abs: std.abs(n=-42),
     sign: std.sign(n=17),