Modest

Values

Zero value

Zero value means 0 for any Integer type, empty array value and empty record value.

	0, [], {}

Any global variable, defined without default value, after creation will contains a zero value.

Literal values

• Integer value expression
• String value expression
• Array value expression
• Record value expression

Immediate values

Immediate value - is an value known in compile time. It can be a complex expression, but there is one rule: all values in this expression must be also immediate.

Example

// all these values are immediate
let x = 2  // 2
let y = 6  // 6
let z = (x * y) / (x + y)  // 1
let w = z < 10  // true

Immutable values

Immutable value - value that cannot be changed in runtime. It is values immediate values, values created by const & let definitions, parameters of functions. It is impossible to get pointer (ref operation) to immutable values.

Binary & Unary operations

Operation Kind	Operation	Valid Argument Types	Result type	Comment
Equality	Eq, NE	Bool, Word8, Char, Integer, Float, Array, Record, Pointer	Bool	-
Comparison	LT, GT, LE, GE	Integer, Float	Bool	-
Arithmetical	Add, Sub, Mul, Div, Rem, Neg	Integer, Float	type(left)	-
Logical and Bitwise	And, Or, Xor, Not	Bool, Word8, Integer	type(left)	-
Shift	ShL, ShR	Integer (& Word8 only as left argument)	type(left)	-

• Binary value expression
• Unary value expression

Special operations

• Call value expression
• Index value expression
• Slice value expression
• Access value expression
• Cast value expression
• Sizeof value expression

Operation precedence

Precedence	Operations	Examples
1	or	a or b
2	xor	a xor b
3	and	a and b
4	==, !=	a == b, a != b
5	<, >, <=, >=	a < b, a > b, a <= b, a >= b
6	<<, >>	a << b, a >> b
7	+, -	a + b, a - b
8	*, /, %	a * b, a / b, a % b
9	cons	Int 5
10	ref, deref, not, +, -	&a, *b, not c, +d, -e
11	call, index, access	init(), arr[0], user.name
12	subexpr, literal	(2 + 2), a

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