coffee/ChaiScript
1
0
Fork 0
mirror of https://github.com/ChaiScript/ChaiScript.git synced 2025-12-06 16:57:04 +08:00
Code Issues Packages Projects Releases Wiki Activity

Updated cheatsheet.md for latest namespace implementation

Browse Source
This commit is contained in:
Stephen Berry 2017-09-05 13:47:53 -05:00
parent ff78d31583
commit 037faddab4
1 changed files with 7 additions and 23 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

30
cheatsheet.md
View File

@ -168,37 +168,21 @@ chai.set_global(chaiscript::var(somevar), "somevar"); // global non-const, overw
## Adding Namespaces
Namespaces will not be populated until `import` is called.
This saves memory and computing costs if a namespace is not imported into every ChaiScript instance.
```
chaiscript::Namespace math;
math["pi"] = chaiscript::const_var(3.14159);
math["sin"] = chaiscript::var(chaiscript::fun([](const double x) { return sin(x); }));
chai.register_namespace(math, "math");
chai.register_namespace([](chaiscript::Namespace& math) {
math["pi"] = chaiscript::const_var(3.14159);
math["sin"] = chaiscript::var(chaiscript::fun([](const double x) { return sin(x); })); },
"math");
```
Import namespace via C++ (_not generally recommended_)
```
chai.import("math");
```
Import namespace via ChaiScript (_recommended_)
Import namespace in ChaiScript
```
import("math")
print(math.pi) // prints 3.14159
```
#### Delayed Namespace Generation
Passing a lambda function that returns a namespace will delay the namespace generation until `import` is called.
This saves memory and computing costs if a namespace is not imported into every ChaiScript instance.
```
chai.register_namespace([]() {
chaiscript::Namespace math;
math["pi"] = chaiscript::const_var(3.14159);
math["sin"] = chaiscript::var(chaiscript::fun([](const double x) { return sin(x); }));
return math; },
"math");
```
# Using STL
ChaiScript recognize many types from STL, but you have to add specific instantiation yourself.