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Impossible to define static 'length' function on class #9215

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2315694
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plantain-00 Sep 14, 2016
7ddb79b
fix error
plantain-00 Sep 15, 2016
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41 changes: 39 additions & 2 deletions src/compiler/checker.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -14217,14 +14217,14 @@ namespace ts {

function checkPropertyDeclaration(node: PropertyDeclaration) {
// Grammar checking
checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarProperty(node) || checkGrammarComputedPropertyName(node.name);
checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarProperty(node) || checkGrammarComputedPropertyName(node.name) || checkGrammarStaticPropertyOrMethodName(node);

checkVariableLikeDeclaration(node);
}

function checkMethodDeclaration(node: MethodDeclaration) {
// Grammar checking
checkGrammarMethod(node) || checkGrammarComputedPropertyName(node.name);
checkGrammarMethod(node) || checkGrammarComputedPropertyName(node.name) || checkGrammarStaticPropertyOrMethodName(node);

// Grammar checking for modifiers is done inside the function checkGrammarFunctionLikeDeclaration
checkFunctionOrMethodDeclaration(node);
Expand All @@ -14236,6 +14236,36 @@ namespace ts {
}
}

function checkGrammarStaticPropertyOrMethodName(node: ClassElement) {
if (node.flags & ModifierFlags.Static) {
if (node.kind === SyntaxKind.PropertyDeclaration) {
return checkGrammarStaticMemberName(node, ((node as ClassElement).name as Identifier).text);
}
else if (node.kind === SyntaxKind.MethodDeclaration) {
if (languageVersion < ScriptTarget.ES6) {
return checkGrammarStaticMemberName(node, ((node as ClassElement).name as Identifier).text);
}
}
}

return false;
}

function checkGrammarStaticMemberName(node: Node, name: string) {
// see: https://github.com/Microsoft/TypeScript/issues/442
const forbiddenNames = ["length", "name", "arguments", "caller"];
if (forbiddenNames.indexOf(name) !== -1) {
if (languageVersion < ScriptTarget.ES6) {
return grammarErrorOnNode(node, Diagnostics._0_is_not_allowed_to_be_used_as_a_name_of_a_static_property_or_method_in_a_class_for_target_ES5, name);
}
else {
return grammarErrorOnNode(node, Diagnostics._0_is_not_allowed_to_be_used_as_a_name_of_a_static_property_in_a_class_for_target_ES6_and_higher, name);
}
}

return false;
}

function checkConstructorDeclaration(node: ConstructorDeclaration) {
// Grammar check on signature of constructor and modifier of the constructor is done in checkSignatureDeclaration function.
checkSignatureDeclaration(node);
Expand Down Expand Up @@ -19714,6 +19744,13 @@ namespace ts {
if (computedPropertyName.expression.kind === SyntaxKind.BinaryExpression && (<BinaryExpression>computedPropertyName.expression).operatorToken.kind === SyntaxKind.CommaToken) {
return grammarErrorOnNode(computedPropertyName.expression, Diagnostics.A_comma_expression_is_not_allowed_in_a_computed_property_name);
}

if (computedPropertyName.expression.kind === SyntaxKind.StringLiteral) {
const member = computedPropertyName.parent.parent.parent;
if (member.flags & ModifierFlags.Static && member.kind === SyntaxKind.PropertyDeclaration) {
return checkGrammarStaticMemberName(computedPropertyName, (computedPropertyName.expression as StringLiteral).text);
}
}
}

function checkGrammarForGenerator(node: FunctionLikeDeclaration) {
Expand Down
8 changes: 8 additions & 0 deletions src/compiler/diagnosticMessages.json
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Expand Up @@ -1959,6 +1959,14 @@
"category": "Error",
"code": 2695
},
"'{0}' is not allowed to be used as a name of a static property or method in a class for target ES5.": {
"category": "Error",
"code": 2696
},
"'{0}' is not allowed to be used as a name of a static property in a class for target ES6 and higher.": {
"category": "Error",
"code": 2697
},

"Import declaration '{0}' is using private name '{1}'.": {
"category": "Error",
Expand Down
49 changes: 49 additions & 0 deletions tests/baselines/reference/checkGrammarStaticMemberName_es5.js
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@@ -0,0 +1,49 @@
//// [checkGrammarStaticMemberName_es5.ts]

class static_property {
static length = 1;
static name = 1;
static arguments = 1;
static caller = 1;
static foo = {
["length"]: 1,
["name"]: 1,
["arguments"]: 1,
["caller"]: 1,
};
}

class static_method {
static length() { return 1; }
static name() { return 1; }
static arguments() { return 1; }
static caller() { return 1; }
}


//// [checkGrammarStaticMemberName_es5.js]
var static_property = (function () {
function static_property() {
}
return static_property;
}());
static_property.length = 1;
static_property.name = 1;
static_property.arguments = 1;
static_property.caller = 1;
static_property.foo = (_a = {},
_a["length"] = 1,
_a["name"] = 1,
_a["arguments"] = 1,
_a["caller"] = 1,
_a);
var static_method = (function () {
function static_method() {
}
static_method.length = function () { return 1; };
static_method.name = function () { return 1; };
static_method.arguments = function () { return 1; };
static_method.caller = function () { return 1; };
return static_method;
}());
var _a;
51 changes: 51 additions & 0 deletions tests/baselines/reference/checkGrammarStaticMemberName_es5.symbols
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@@ -0,0 +1,51 @@
=== tests/cases/compiler/checkGrammarStaticMemberName_es5.ts ===

class static_property {
>static_property : Symbol(static_property, Decl(checkGrammarStaticMemberName_es5.ts, 0, 0))

static length = 1;
>length : Symbol(static_property.length, Decl(checkGrammarStaticMemberName_es5.ts, 1, 23))

static name = 1;
>name : Symbol(static_property.name, Decl(checkGrammarStaticMemberName_es5.ts, 2, 22))

static arguments = 1;
>arguments : Symbol(static_property.arguments, Decl(checkGrammarStaticMemberName_es5.ts, 3, 20))

static caller = 1;
>caller : Symbol(static_property.caller, Decl(checkGrammarStaticMemberName_es5.ts, 4, 25))

static foo = {
>foo : Symbol(static_property.foo, Decl(checkGrammarStaticMemberName_es5.ts, 5, 22))

["length"]: 1,
>"length" : Symbol(["length"], Decl(checkGrammarStaticMemberName_es5.ts, 6, 18))

["name"]: 1,
>"name" : Symbol(["name"], Decl(checkGrammarStaticMemberName_es5.ts, 7, 22))

["arguments"]: 1,
>"arguments" : Symbol(["arguments"], Decl(checkGrammarStaticMemberName_es5.ts, 8, 20))

["caller"]: 1,
>"caller" : Symbol(["caller"], Decl(checkGrammarStaticMemberName_es5.ts, 9, 25))

};
}

class static_method {
>static_method : Symbol(static_method, Decl(checkGrammarStaticMemberName_es5.ts, 12, 1))

static length() { return 1; }
>length : Symbol(static_method.length, Decl(checkGrammarStaticMemberName_es5.ts, 14, 21))

static name() { return 1; }
>name : Symbol(static_method.name, Decl(checkGrammarStaticMemberName_es5.ts, 15, 33))

static arguments() { return 1; }
>arguments : Symbol(static_method.arguments, Decl(checkGrammarStaticMemberName_es5.ts, 16, 31))

static caller() { return 1; }
>caller : Symbol(static_method.caller, Decl(checkGrammarStaticMemberName_es5.ts, 17, 36))
}

64 changes: 64 additions & 0 deletions tests/baselines/reference/checkGrammarStaticMemberName_es5.types
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@@ -0,0 +1,64 @@
=== tests/cases/compiler/checkGrammarStaticMemberName_es5.ts ===

class static_property {
>static_property : static_property

static length = 1;
>length : number
>1 : 1

static name = 1;
>name : number
>1 : 1

static arguments = 1;
>arguments : number
>1 : 1

static caller = 1;
>caller : number
>1 : 1

static foo = {
>foo : { ["length"]: number; ["name"]: number; ["arguments"]: number; ["caller"]: number; }
>{ ["length"]: 1, ["name"]: 1, ["arguments"]: 1, ["caller"]: 1, } : { ["length"]: number; ["name"]: number; ["arguments"]: number; ["caller"]: number; }

["length"]: 1,
>"length" : "length"
>1 : 1

["name"]: 1,
>"name" : "name"
>1 : 1

["arguments"]: 1,
>"arguments" : "arguments"
>1 : 1

["caller"]: 1,
>"caller" : "caller"
>1 : 1

};
}

class static_method {
>static_method : static_method

static length() { return 1; }
>length : () => number
>1 : 1

static name() { return 1; }
>name : () => number
>1 : 1

static arguments() { return 1; }
>arguments : () => number
>1 : 1

static caller() { return 1; }
>caller : () => number
>1 : 1
}

42 changes: 42 additions & 0 deletions tests/baselines/reference/checkGrammarStaticMemberName_es6.js
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@@ -0,0 +1,42 @@
//// [checkGrammarStaticMemberName_es6.ts]

class static_property {
static length = 1;
static name = 1;
static arguments = 1;
static caller = 1;
static foo = {
["length"]: 1,
["name"]: 1,
["arguments"]: 1,
["caller"]: 1,
};
}

class static_method {
static length() { return 1; }
static name() { return 1; }
static arguments() { return 1; }
static caller() { return 1; }
}


//// [checkGrammarStaticMemberName_es6.js]
class static_property {
}
static_property.length = 1;
static_property.name = 1;
static_property.arguments = 1;
static_property.caller = 1;
static_property.foo = {
["length"]: 1,
["name"]: 1,
["arguments"]: 1,
["caller"]: 1,
};
class static_method {
static length() { return 1; }
static name() { return 1; }
static arguments() { return 1; }
static caller() { return 1; }
}
51 changes: 51 additions & 0 deletions tests/baselines/reference/checkGrammarStaticMemberName_es6.symbols
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@@ -0,0 +1,51 @@
=== tests/cases/compiler/checkGrammarStaticMemberName_es6.ts ===

class static_property {
>static_property : Symbol(static_property, Decl(checkGrammarStaticMemberName_es6.ts, 0, 0))

static length = 1;
>length : Symbol(static_property.length, Decl(checkGrammarStaticMemberName_es6.ts, 1, 23))

static name = 1;
>name : Symbol(static_property.name, Decl(checkGrammarStaticMemberName_es6.ts, 2, 22))

static arguments = 1;
>arguments : Symbol(static_property.arguments, Decl(checkGrammarStaticMemberName_es6.ts, 3, 20))

static caller = 1;
>caller : Symbol(static_property.caller, Decl(checkGrammarStaticMemberName_es6.ts, 4, 25))

static foo = {
>foo : Symbol(static_property.foo, Decl(checkGrammarStaticMemberName_es6.ts, 5, 22))

["length"]: 1,
>"length" : Symbol(["length"], Decl(checkGrammarStaticMemberName_es6.ts, 6, 18))

["name"]: 1,
>"name" : Symbol(["name"], Decl(checkGrammarStaticMemberName_es6.ts, 7, 22))

["arguments"]: 1,
>"arguments" : Symbol(["arguments"], Decl(checkGrammarStaticMemberName_es6.ts, 8, 20))

["caller"]: 1,
>"caller" : Symbol(["caller"], Decl(checkGrammarStaticMemberName_es6.ts, 9, 25))

};
}

class static_method {
>static_method : Symbol(static_method, Decl(checkGrammarStaticMemberName_es6.ts, 12, 1))

static length() { return 1; }
>length : Symbol(static_method.length, Decl(checkGrammarStaticMemberName_es6.ts, 14, 21))

static name() { return 1; }
>name : Symbol(static_method.name, Decl(checkGrammarStaticMemberName_es6.ts, 15, 33))

static arguments() { return 1; }
>arguments : Symbol(static_method.arguments, Decl(checkGrammarStaticMemberName_es6.ts, 16, 31))

static caller() { return 1; }
>caller : Symbol(static_method.caller, Decl(checkGrammarStaticMemberName_es6.ts, 17, 36))
}

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