//: Arithmetic primitives :(before "End Primitive Recipe Declarations") ADD, :(before "End Primitive Recipe Numbers") put(Recipe_ordinal, "add", ADD); :(before "End Primitive Recipe Checks") case ADD: { // primary goal of these checks is to forbid address arithmetic for (int i = 0; i < SIZE(inst.ingredients); ++i) { if (!is_mu_number(inst.ingredients.at(i))) { raise << maybe(get(Recipe, r).name) << "'add' requires number ingredients, but got '" << inst.ingredients.at(i).original_string << "'\n" << end(); goto finish_checking_instruction; } } if (SIZE(inst.products) > 1) { raise << maybe(get(Recipe, r).name) << "'add' yields exactly one product in '" << to_original_string(inst) << "'\n" << end(); break; } if (!inst.products.empty() && !is_dummy(inst.products.at(0)) && !is_mu_number(inst.products.at(0))) { raise << maybe(get(Recipe, r).name) << "'add' should yield a number, but got '" << inst.products.at(0).original_string << "'\n" << end(); break; } break; } :(before "End Primitive Recipe Implementations") case ADD: { double result = 0; for (int i = 0; i < SIZE(ingredients); ++i) { result += ingredients.at(i).at(0); } products.resize(1); products.at(0).push_back(result); break; } :(scenario add_literal) def main [ 1:num <- add 23, 34 ] +mem: storing 57 in location 1 :(scenario add) def main [ 1:num <- copy 23 2:num <- copy 34 3:num <- add 1:num, 2:num ] +mem: storing 57 in location 3 :(scenario add_multiple) def main [ 1:num <- add 3, 4, 5 ] +mem: storing 12 in location 1 :(scenario add_checks_type) % Hide_errors = true; def main [ 1:num <- add 2:bool, 1 ] +error: main: 'add' requires number ingredients, but got '2:bool' :(scenario add_checks_return_type) % Hide_errors = true; def main [ 1:address:num <- add 2, 2 ] +error: main: 'add' should yield a number, but got '1:address:num' :(before "End Primitive Recipe Declarations") SUBTRACT, :(before "End Primitive Recipe Numbers") put(Recipe_ordinal, "subtract", SUBTRACT); :(before "End Primitive Recipe Checks") case SUBTRACT: { if (inst.ingredients.empty()) { raise << maybe(get(Recipe, r).name) << "'subtract' has no ingredients\n" << end(); break; } for (int i = 0; i < SIZE(inst.ingredients); ++i) { if (is_raw(inst.ingredients.at(i))) continue; // permit address offset computations in tests if (!is_mu_number(inst.ingredients.at(i))) { raise << maybe(get(Recipe, r).name) << "'subtract' requires number ingredients, but got '" << inst.ingredients.at(i).original_string << "'\n" << end(); goto finish_checking_instruction; } } if (SIZE(inst.products) > 1) { raise << maybe(get(Recipe, r).name) << "'subtract' yields exactly one product in '" << to_original_string(inst) << "'\n" << end(); break; } if (!inst.products.empty() && !is_dummy(inst.products.at(0)) && !is_mu_number(inst.products.at(0))) { raise << maybe(get(Recipe, r).name) << "'subtract' should yield a number, but got '" << inst.products.at(0).original_string << "'\n" << end(); break; } break; } :(before "End Primitive Recipe Implementations") case SUBTRACT: { double result = ingredients.at(0).at(0); for (int i = 1; i < SIZE(ingredients); ++i) result -= ingredients.at(i).at(0); products.resize(1); products.at(0).push_back(result); break; } :(code) bool is_raw(const reagent& r) { return has_property(r, "raw"); } :(scenario subtract_literal) def main [ 1:num <- subtract 5, 2 ] +mem: storing 3 in location 1 :(scenario subtract) def main [ 1:num <- copy 23 2:num <- copy 34 3:num <- subtract 1:num, 2:num ] +mem: storing -11 in location 3 :(scenario subtract_multiple) def main [ 1:num <- subtract 6, 3, 2 ] +mem: storing 1 in location 1 :(before "End Primitive Recipe Declarations") MULTIPLY, :(before "End Primitive Recipe Numbers") put(Recipe_ordinal, "multiply", MULTIPLY); :(before "End Primitive Recipe Checks") case MULTIPLY: { for (int i = 0; i < SIZE(inst.ingredients); ++i) { if (!is_mu_number(inst.ingredients.at(i))) { raise << maybe(get(Recipe, r).name) << "'multiply' requires number ingredients, but got '" << inst.ingredients.at(i).original_string << "'\n" << end(); goto finish_checking_instruction; } } if (SI
discard """
file: "tropes.nim"
output: '''0
3
123
3
6
123
123456
2
3'''
"""
import ropes
var
r1 = rope("")
r2 = rope("123")
echo r1.len
echo r2.len
echo r1
echo r2
r1.add("123")
r2.add("456")
echo r1.len
echo r2.len
echo r1
echo r2
echo r1[1]
echo r2[2]