add coroutine examples

build.sh

@@ -4,7 +4,8 @@
 set -e
 
 # example sources
-EXAMPLES="format listdir range range_pipe signal stream1 stream2"
+EXAMPLES="format listdir range range_pipe signal"
+EXAMPLES="${EXAMPLES} stream1 stream2 coroutine1 coroutine2"
 
 # assembly sources
 ASM_SOURCES="jump_all_gas make_all_gas ontop_all_gas"

examples/coroutine1.cc

@@ -0,0 +1,196 @@
+#include <ostd/io.hh>
+#include <ostd/coroutine.hh>
+
+using namespace ostd;
+
+struct foo {
+    foo() {
+        writeln("***foo ctor***");
+    }
+    ~foo() {
+        writeln("***foo dtor***");
+    }
+};
+
+int main() {
+    writeln("MAIN START");
+    for (int steps: range(1, 10)) {
+        if (steps != 1) {
+            /* separate the results */
+            writeln();
+        }
+        writefln("** SCOPE START %d **", steps);
+        coroutine<int(int)> f = [](auto &coro, int x) {
+            foo test;
+            writeln("got: ", x);
+            for (int i: range(x)) {
+                writeln("loop: ", i);
+                writeln("yield: ", coro.yield(i * 10));
+            }
+            writeln("return");
+            return 1234;
+        };
+        writeln("CALL");
+        int val = 5;
+        for (int i: range(steps)) {
+            writeln("COROUTINE RETURNED: ", f(val));
+            writefln("OUT %d (dead: %s)", i, !f);
+            val += 5;
+        }
+        writefln("** SCOPE END %d **", steps);
+    }
+    writeln("MAIN END");
+}
+
+/*
+MAIN START
+** SCOPE START 1 **
+CALL
+***foo ctor***
+got: 5
+loop: 0
+COROUTINE RETURNED: 0
+OUT 0 (dead: false)
+** SCOPE END 1 **
+***foo dtor***
+
+** SCOPE START 2 **
+CALL
+***foo ctor***
+got: 5
+loop: 0
+COROUTINE RETURNED: 0
+OUT 0 (dead: false)
+yield: 10
+loop: 1
+COROUTINE RETURNED: 10
+OUT 1 (dead: false)
+** SCOPE END 2 **
+***foo dtor***
+
+** SCOPE START 3 **
+CALL
+***foo ctor***
+got: 5
+loop: 0
+COROUTINE RETURNED: 0
+OUT 0 (dead: false)
+yield: 10
+loop: 1
+COROUTINE RETURNED: 10
+OUT 1 (dead: false)
+yield: 15
+loop: 2
+COROUTINE RETURNED: 20
+OUT 2 (dead: false)
+** SCOPE END 3 **
+***foo dtor***
+
+** SCOPE START 4 **
+CALL
+***foo ctor***
+got: 5
+loop: 0
+COROUTINE RETURNED: 0
+OUT 0 (dead: false)
+yield: 10
+loop: 1
+COROUTINE RETURNED: 10
+OUT 1 (dead: false)
+yield: 15
+loop: 2
+COROUTINE RETURNED: 20
+OUT 2 (dead: false)
+yield: 20
+loop: 3
+COROUTINE RETURNED: 30
+OUT 3 (dead: false)
+** SCOPE END 4 **
+***foo dtor***
+
+** SCOPE START 5 **
+CALL
+***foo ctor***
+got: 5
+loop: 0
+COROUTINE RETURNED: 0
+OUT 0 (dead: false)
+yield: 10
+loop: 1
+COROUTINE RETURNED: 10
+OUT 1 (dead: false)
+yield: 15
+loop: 2
+COROUTINE RETURNED: 20
+OUT 2 (dead: false)
+yield: 20
+loop: 3
+COROUTINE RETURNED: 30
+OUT 3 (dead: false)
+yield: 25
+loop: 4
+COROUTINE RETURNED: 40
+OUT 4 (dead: false)
+** SCOPE END 5 **
+***foo dtor***
+
+** SCOPE START 6 **
+CALL
+***foo ctor***
+got: 5
+loop: 0
+COROUTINE RETURNED: 0
+OUT 0 (dead: false)
+yield: 10
+loop: 1
+COROUTINE RETURNED: 10
+OUT 1 (dead: false)
+yield: 15
+loop: 2
+COROUTINE RETURNED: 20
+OUT 2 (dead: false)
+yield: 20
+loop: 3
+COROUTINE RETURNED: 30
+OUT 3 (dead: false)
+yield: 25
+loop: 4
+COROUTINE RETURNED: 40
+OUT 4 (dead: false)
+yield: 30
+return
+***foo dtor***
+COROUTINE RETURNED: 1234
+OUT 5 (dead: true)
+** SCOPE END 6 **
+
+** SCOPE START 7 **
+CALL
+***foo ctor***
+got: 5
+loop: 0
+COROUTINE RETURNED: 0
+OUT 0 (dead: false)
+yield: 10
+loop: 1
+COROUTINE RETURNED: 10
+OUT 1 (dead: false)
+yield: 15
+loop: 2
+COROUTINE RETURNED: 20
+OUT 2 (dead: false)
+yield: 20
+loop: 3
+COROUTINE RETURNED: 30
+OUT 3 (dead: false)
+yield: 25
+loop: 4
+COROUTINE RETURNED: 40
+OUT 4 (dead: false)
+yield: 30
+return
+***foo dtor***
+COROUTINE RETURNED: 1234
+OUT 5 (dead: true)
+terminating with uncaught exception of type ostd::coroutine_error: dead coroutine
+*/

examples/coroutine2.cc

@@ -0,0 +1,28 @@
+#include <ostd/io.hh>
+#include <ostd/coroutine.hh>
+
+using namespace ostd;
+
+int main() {
+    generator<int> g = [](auto &coro) {
+        coro.yield(5);
+        coro.yield(10);
+        coro.yield(15);
+        coro.yield(20);
+        return 25;
+    };
+
+    writeln("generator test");
+    for (int i: g) {
+        writeln("generated: ", i);
+    }
+}
+
+/*
+generator test
+generated: 5
+generated: 10
+generated: 15
+generated: 20
+generated: 25
+*/