module builtin // used to generate JS throw statements. [noreturn] pub fn js_throw(s any) { #throw s for {} } #let globalPrint; $if js_freestanding { #globalPrint = globalThis.print } pub fn flush_stdout() { // needed for parity with builtin.c.v } pub fn flush_stderr() { // needed for parity with builtin.c.v } pub fn println(s string) { $if js_freestanding { #globalPrint(s.str) } $else { #console.log(s.str) } } pub fn print(s string) { $if js_node { #$process.stdout.write(s.str) } $else { panic('Cannot `print` in a browser, use `println` instead') } } pub fn eprintln(s string) { $if js_freestanding { #globalPrint(s.str) } $else { #console.error(s.str) } } pub fn eprint(s string) { $if js_node { #$process.stderr.write(s.str) } $else { panic('Cannot `eprint` in a browser, use `println` instead') } } // Exits the process in node, and halts execution in the browser // because `process.exit` is undefined. Workaround for not having // a 'real' way to exit in the browser. [noreturn] pub fn exit(c int) { JS.process.exit(c) js_throw('exit(${c})') } fn opt_ok(data voidptr, option Option) { #option.state = 0 #option.err = none__ #option.data = data } pub fn unwrap(opt string) string { mut o := Option{} #o = opt if o.state != 0 { js_throw(o.err) } mut res := '' #res = opt.data return res } fn js_stacktrace() string { stacktrace := '' #let err = new TypeError(); #err.name = 'stacktrace: ' #stacktrace.str = err.stack return stacktrace } pub fn print_backtrace() { println(js_stacktrace()) } // Check for nil value pub fn isnil(val voidptr) bool { res := false // This one is kinda weird. In C and native backend we can cast booleans and integers to pointers // so we just check *for* all possible NULL-like values here. #if (typeof val == 'function') { res.val = false; } else { #val = val instanceof voidptr ? val.valueOf().val : val; #res.val = val === null || val === undefined || val === false || val === 0 || val === BigInt(0) || (val instanceof int ? val.val == 0 : false) #} return res } pub fn (f float_literal) str() string { res := '' #res.str += f.valueOf() return res }