The interpreter is an object that handles the translation and execution of code at runtime. It is that what runs any program code and defines a context for it.
( a = 5 + 7; this.cmdLine.postln; )
In the interpreter, this refers to the interpreter itself, e.g.: this.postln
The interpreter defines global variables (a … z), that can be used for interactive programming. Except these single letter variables ("interpreter variables"), all variables have to be defined by the keyword var (see: Assignment Statements, and Scoping and Closure).
// typical usage
a = 4;
b = 3;
b = b + a;
// some sound
a = Synth(\default);
g = fork { loop { 0.1.wait; a.set(\freq, 200 + 20.0.rand2.postln) } };
g.stop; a.free;
// an overview of all the variables
this.inspect;
s is by convention bound to the default server (Server) and should not be changed.set the values of the variables a through z to nil.
x = 123; x.postln; this.clearAll; x.postln;
Compile and execute a String.
this.interpret("(123 + 4000).postln");
Compile and execute a String, printing the result.
this.interpretPrint("123 + 4000");
Compile a String and return a Function.
(
z = this.compile("(123 + 4000).postln");
z.postln;
z.value;
)
Reads the file at pathName, compiles it and returns a Function. The file must contain a valid SuperCollider expression, naturally. This will not compile class definitions, only expressions.
Reads the file at pathName, compiles it and executes it, returning the result. The file must contain a valid SuperCollider expression, naturally. This will not compile class definitions, only expressions.
Returns the previously interpreted code.
1 + 2; this.cmdLine
this interpreter variable can be set to evaluate a function with any successfully compiled code. see e.g. the class History.
a = [ ]; // store all the code evaluated in a
this.codeDump = { |code| a = a.add(code) };
1 + 3;
f = { "hallo" };
a.postcs;
codeDump = nil; // reset to nil.
can be used to modify code before it is interpreted. Given appropriate delimiters, this can be used to implement little languages.
// silly but simple: understand a Saw for every SinOsc
this.preProcessor = { |code| code.replace("SinOsc", "Saw") };
{ SinOsc.ar(200) * 0.1 }.play;
preProcessor = nil; // reset to nil.
Global variables ("interpreter variables") for interactive programming (see Accessing).