From ftm
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| Line 18: | Line 18: | ||
* -2 ... an int | * -2 ... an int | ||
* 2.3 ... a float | * 2.3 ... a float | ||
| − | * -4 ... a loat | + | * -4. ... a loat |
| − | * | + | * 5.67e-4 ... a float |
| − | * . | + | * .89 ... a float |
| − | * | + | * ten ... a symbol |
| − | * | + | * 11-12 ... a symbol (because no space!) |
| + | * -thirteen ... a symbol | ||
| + | |||
| + | Named values are defined by the FTM definition object ''ftm.object''. The names are used in expressions with a leading dollar, '$'. | ||
== Parenthesis == | == Parenthesis == | ||
Revision as of 12:11, 6 June 2007
FTM expressions are used in the following contexts
- the FTM message box (ftm.mess)
- the FTM definition (ftm.object)
- the expr class/object
The syntax is basically always the same appart from minor context dependent details.
Values and Lists
The values of FTM expressions can be int, float, symbol or references to FTM object. They values can be represended by the following terms:
- a simple value (int, float, symbol)
- a named value such as $x or $myobj or $myconst
- an element
Examples of simple values are
- 1 ... an int
- -2 ... an int
- 2.3 ... a float
- -4. ... a loat
- 5.67e-4 ... a float
- .89 ... a float
- ten ... a symbol
- 11-12 ... a symbol (because no space!)
- -thirteen ... a symbol
Named values are defined by the FTM definition object ftm.object. The names are used in expressions with a leading dollar, '$'.
Parenthesis
Parenthesis in FTM expressions, '(' and ')', always will (try to) evaluate the contained elements to a single value.
Inside parenthesis you'd have either one
- a value (in which case the parenthesis are useless)
- a simple infix expression
- a simple prefix expression