execute objc code fragment

exec-objc.sh

#! /bin/bash
#
# exec-objc.sh <<'EOD'
# NSLog(@"this script compile and execute objective-c code fragment");
# EOD
#

SRC=$(mktemp exec-objc-src.XXXXXXXX)
OUT=$(mktemp exec-objc-out.XXXXXXXX)
trap 'rm -f ${SRC} ${OUT}' EXIT

cat >>${SRC} <<'EOD'
#import <Foundation/Foundation.h>
void doIt() {
EOD
cat >>${SRC} </dev/stdin
cat >>${SRC} <<'EOD'
}
int main() {
@autoreleasepool {
doIt();
}
return 0;
}
EOD

clang -Wall -x objective-c -std=c99 -fobjc-arc "$@" -framework Foundation -o ${OUT} ${SRC} && PATH=.:$PATH ${OUT}