NML:Elementary values

2024-01-26T22:16:42Z

Tony pixel:

{{NMLNavExpressions}}

Elementary values in expressions are

{| class="wikitable sortable"
! Element
! Syntax (Python RE)
! Description
|-
| Decimal number
| [0-9]+
| one or more digits
|-
| Hexadecimal number
| 0x[0-9A-Fa-f]+
| "0x" followed by one or more hexadecimal digits
|-
| Floating point number
| [0-9]+\.[0-9]+
| a decimal number, a dot, and another decimal number. Only supported for some properties that expect a floating point number.
|-
| Identifier
| [a-zA-Z_][a-zA-Z0-9_]*
| a letter or underscore, optionally followed by more letters, digits, or underscore characters
|-
| String
| <nowiki>"([^"\\]|\\.)*"</nowiki>
| A double quote character, followed by zero or more characters, ending with another double quote character. A character in-between is any single character except a double quote or a back-slash ("\"). It can also be "\\", "\n", "\t", or "\[0-9A-Fa-f][0-9A-Fa-f]" (a back-slash followed by exactly two hexadecimal digits).
|-
| Setting
| an Identifier
|
The name of a [[NML:GRF parameters|GRF setting]]
|-
| Parameter
| param[''<num>'']
| Read/write the parameter with the given number.
|-
| Parameter from another GRF
| param[''<grfid>'', ''<num>'']
| Read the value of a parameter of another grf
|-
| Unit
| nfo|mph|km/h|m/s|hp|kW|hpI|hpM|tons|ton|kg|snow%
|
See the section on [[NML:Units|units]].
|}

You can combine those elementary values using operators like you're used to from other languages. The following operators are supported:
* Arithmetic operators: +, -, *, /, %
* Bitwise/logic operators: &, |, ^, &&, ||, <<, >>
* Comparison operators: ==, !=, <=, >=, <, >
* Ternary operator: ? : (only for integers)

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NML:Elementary values