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module primitives.eval;
import std.variant;
import state.stack;
import definition = state.definition;
import variable = state.variable;
import core = primitives.core;
import conditional = primitives.conditional;
bool evaluate(Token token) {
if ( definition.handle(token) ) {
return true;
}
if ( conditional.handle(token) ) {
return true;
}
if ( variable.handle(token) ) {
return true;
}
return token.visit!(
(int value) => false,
(bool value) => false,
(string word ) => core.handle(word)
);
}
Stack!Token result() {
if ( conditional.dischargeable ) {
return conditional.discharge;
} else {
return Stack!Token();
}
}
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