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// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include <vespa/eval/eval/function.h>
#include <vespa/eval/eval/interpreted_function.h>
using namespace vespalib::eval;
int main(int argc, char **argv) {
if (argc != 2) {
fprintf(stderr, "usage: %s <expr>\n", argv[0]);
fprintf(stderr, " the expression must be self-contained (no arguments)\n");
fprintf(stderr, " quote the expression to make it a single parameter\n");
fprintf(stderr, " use let to simulate parameters: let(x, 1, x + 3)\n");
return 1;
}
Function function = Function::parse({}, argv[1]);
if (function.has_error()) {
fprintf(stderr, "expression error: %s\n", function.get_error().c_str());
return 1;
}
InterpretedFunction interpreted(SimpleTensorEngine::ref(), function, NodeTypes());
InterpretedFunction::Context ctx(interpreted);
InterpretedFunction::SimpleParams params({});
double result = interpreted.eval(ctx, params).as_double();
fprintf(stdout, "%.32g\n", result);
return 0;
}
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