Lexical Structure

Keywords

• Directives/Declarators: import class, struct, enum, interface, mixin, unittest
• Access Control: public, private, module, package
• Storage Classes: meta, ref, out, scope
• Control Flow: for, loop, break, continue, return, throw, try, catch,
• Built-In Values: this, super, null, true, false
• Basic Types: type, void, bool, byte, ubyte, short, ushort, int, uint, long, ulong, size, sizediff, float, double, real, char, wchar, dchar
• Type Qualifiers: isolated, escape, immutable, const, shared, synchronized
• Type Casting: cast

Punctuation

• Operators: &&, ||, ?, !, ~, +, -, *, /, %, &, |, ^, ^^, <<, >>, =, +=, -=, *=, /=, %=, &=, |=, ^=, ~=, ^^=, <<=, >>=, ++, --, ==, !=, <=, <, >, >=, <>, is, !is, =>, [, ]
• Delimiters: ., :, ,, ;, (, ), {, }
• Other: $, #, @

Identifiers

Identifiers must start with an alphabetic Unicode character or with an underscore (_) and can contain any number of alpanumeric characters and underscores. An identifier cannot be identical to one of the keywords listed above.

Identifiers starting with two consecutive underscores (__) are reserved to the language/runtime implementation and should not be used for user defined symbols. Unless explicitly specified, the name of symbols starting with two underscores is implementation defined.

Constant Literals

• true: Value of type bool equivalent to one
• false: Value of type bool equivalent to zero
• null: Value of type typeof(null) representing a pointer to the zero address, which is equivalent to a pointer to "nothing"

Numeric Literals

The following types of numeric literals are available:

• Decimal Integers: These consist of either a single zero (0), or a non-zero digit followed by zero or more digits.
• Hexadecimal Integers: ❌ Not Implemented
• Decimal Floating-Point Numbers: ❌ Not Implemented

String Literals

• Escaped Strings: ⚠️ TODO/❌ Not Fully Implemented
• Interpolated Strings: ⚠️ TODO
• RAW Strings: Raw strings are arbitrary character sequences delimited by a backtick character. No escaping or string interpolation is performed on the contained character sequence.