TypeScript Language Specification v1.5

4.9.1 Standard Function Expressions ........................................................................................................................... 63
4.9.2 Arrow Function Expressions ................................................................................................................................. 63
4.9.3 Contextually Typed Function Expressions ...................................................................................................... 65
4.10 Property Access ............................................................................................................................................................. 65
4.11 The new Operator ......................................................................................................................................................... 67
4.12 Function Calls ................................................................................................................................................................. 67
4.12.1 Overload Resolution ............................................................................................................................................... 68
4.12.2 Type Argument Inference ..................................................................................................................................... 69
4.12.3 Grammar Ambiguities ............................................................................................................................................ 71
4.13 Type Assertions .............................................................................................................................................................. 72
4.14 Unary Operators ............................................................................................................................................................ 73
4.14.1 The ++ and -- operators ....................................................................................................................................... 73
4.14.2 The +, –, and ~ operators ..................................................................................................................................... 73
4.14.3 The ! operator ............................................................................................................................................................ 73
4.14.4 The delete Operator ................................................................................................................................................ 74
4.14.5 The void Operator ................................................................................................................................................... 74
4.14.6 The typeof Operator ............................................................................................................................................... 74
4.15 Binary Operators ........................................................................................................................................................... 74
4.15.1 The *, /, %, –, , >>>, &, ^, and | operators ...................................................................................... 74
4.15.2 The + operator .......................................................................................................................................................... 75
4.15.3 The , =, ==, !=, ===, and !== operators ................................................................................... 75
4.15.4 The instanceof operator ........................................................................................................................................ 76
4.15.5 The in operator ......................................................................................................................................................... 76
4.15.6 The && operator ...................................................................................................................................................... 76
4.15.7 The || operator ........................................................................................................................................................... 76
4.16 The Conditional Operator .......................................................................................................................................... 77
4.17 Assignment Operators ................................................................................................................................................ 77
4.17.1 Destructuring Assignment .................................................................................................................................... 78
4.18 The Comma Operator ................................................................................................................................................. 80
4.19 Contextually Typed Expressions .............................................................................................................................. 80
4.20 Type Guards .................................................................................................................................................................... 81
5 Statements .................................................................................................................................................................................. 87
5.1 Variable Statements ..................................................................................................................................................... 87
5.1.1 Simple Variable Declarations ............................................................................................................................... 87
5.1.2 Destructuring Variable Declarations................................................................................................................. 88
5.1.3 Implied Type .............................................................................................................................................................. 91
5.2 If, Do, and While Statements .................................................................................................................................... 92
5.3 For Statements ............................................................................................................................................................... 92
5.4 For-In Statements ......................................................................................................................................................... 92
5.5 Continue Statements ................................................................................................................................................... 93
5.6 Break Statements .......................................................................................................................................................... 93
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