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Closure operator now behaves as default argument operator, documentation.

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git-svn-id: svn://svn.code.sf.net/p/magicseteditor/code/trunk@965 0fc631ac-6414-0410-93d0-97cfa31319b6
This commit is contained in:
twanvl
2008-06-03 18:33:17 +00:00
parent c5159ebcf7
commit d00beeb55f
11 changed files with 182 additions and 60 deletions
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doc/script/index.txt
+38
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@@ -12,3 +12,41 @@ MSE uses a custom scripting language to add complicated behaviour to [[type:fiel
See also:
* [[type:index|Data types used]]
* [[fun:index|Built in functions]]
--Syntax index--
| @123@ [[type:int|A literal number]]
| @"stuff"@ [[type:string|A literal string]]
| @[a,b,c]@ [[type:list|A literal list]]
| @[a:b, c:d]@ [[type:map|A literal map]]
| @{ expr }@ [[script:variables#Functions|Function definition]]
| @fun(a:b, c:d)@ [[script:variables#Functions|Function call]]
| @fun(value)@ [[script:variables#Functions|Function call with '@input@' argument]]
| @fun@@(a:b)@ [[script:variables#Default arguments|Default arguments]]
| @a.b@ [[script:operators|Property 'b' of 'a']]
| @a[b]@ [[script:operators|Property 'value of b' of 'a']]
| @-a@ [[script:operators|Negation]]
| @a + b@ [[script:operators|Addition / concatenation]]
| @a - b@ [[script:operators|Subtraction]]
| @a * b@ [[script:operators|Multiplication]]
| @a / b@ [[script:operators|Floating point division]]
| @a div b@ [[script:operators|Integer division]]
| @a mod b@ [[script:operators|Remainder]]
| @not a@ [[type:boolean|Boolean not]]
| @a and b@ [[type:boolean|Boolean conjunction]]
| @a or b@ [[type:boolean|Boolean disjunction]]
| @a xor b@ [[type:boolean|Boolean xor]]
| @a == b@ [[script:operators|Comparison for equality]]
| @a != b@ [[script:operators|Comparison for inequality]]
| @a < b@ [[script:operators|Comparison]]
| @a > b@ [[script:operators|Comparison]]
| @a <= b@ [[script:operators|Comparison]]
| @a >= b@ [[script:operators|Comparison]]
| @a or else b@ Use @a@ unless it is an error, then use @b@ instead.
| @min(a,b,c,...)@ [[script:operators|Smallest of the values]]
| @max(a,b,c,...)@ [[script:operators|Largest of the values]]
| @rgb(r,g,b)@ [[type:color|A color value]]
| @rgba(r,g,b)@ [[type:color|A color value with transparency]]
| @if x then y@ [[script:control structures|Conditional expresion]]
| @if x then y else z@ [[script:control structures|Conditional expresion]]
| @for x in list do y@ [[script:control structures|Loop over elements in a list]]
| @for x from a to b do y@ [[script:control structures|Loop over numbers from a to b]]
doc/script/variables.txt
+13
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@@ -74,4 +74,17 @@ This can be done by first making a copy, and calling that:
> to_upper("xyz") == "upper case: XYZ"
Note that @real_to_upper@ is called without extra parameters, the @input@ variable is still set from the outer call to the new @to_upper@ itself.
--Default arguments--
It is possible to declare default arguments for functions using the @@@@ operator.
> function := { "argument was: " + arg }@(arg:"default")
If this function is called without the @arg@ argument, then the default value @default@ is used instead.
For example:
> function() == "argument was: default"
> function(arg: "something else") == "argument was: something else"
For determining whether the argument is set only explicit arguments count, not everything in scope, so
> arg := "something else"
> function() == "argument was: default"
Defaults are evaluated at the time the @@@@ operator is evaluated, so they can be used to simulate static scoping.
<div style="text-align:right;">next: <a href="control_structures">Control structures &rarr;</a></div>