{ :emit } Where Define (emit w program) Define (write s) (IO.write_all w s) In Let emit (make_emit write) In Begin { (write "#include <support.h>\n") (write "const U2 record_layouts[]={") (LIST.for_each program.record_indexes Func index Begin { (LIST.for_each index Func label Begin { (write (Z.show label)) (write ",") }) (write "Z,") }) (write "};\n") Begin Match program.constants { | 'nil | 'cons._ (write "static X ") (LIST.reduce (LIST.iota (LIST.length program.constants)) "" Func {prefix i} Begin { (write prefix) (write "c") (write (Z.show i)) (Return ",") }) (write ";\n") } (LIST.for_each (LIST.reverse program.functions) emit) (write "int main(int argc,const char*argv[]){\n") (write "static _Alignas(16) char heap_bytes[256*1024*1024];") (write "s36(sizeof(heap_bytes),heap_bytes,1024*1024,sizeof(record_layouts)/sizeof(record_layouts[0]),record_layouts,argc,argv);\n") (LIST.for_each_numbered program.constants Func {i s} Begin { (emit 'c.i) (write "=({const char s[]=") (write s) (write ";s86(sizeof(s)-1,s);});") }) (write "\n") (emit program.init) (write ";\n") (write "return 0;}\n") } Where Define (make_emit write) Let compile Define (write s) 'write.s Define (sequence terms) 'sequence.terms Define (compile term) 'compile.term In Let write_comma (write ",") In Define (comma_sep terms) (sequence (LIST.join write_comma terms)) Define (comma_pre terms) (sequence (LIST.fold terms 'nil Func {term terms} [write_comma & term & terms])) In Func term Match term { | 'stmt.stmt Match stmt { | 'expr.expr (sequence (Reduce & (write "({X t=s52(),x=") (compile 'expr.expr) (write ";s15(t);x;});") 'nil)) | 'assign.{var expr} (sequence (Reduce & (compile 'expr.var) (write "=") (compile 'expr.expr) (write ";") 'nil)) | 'env_access.{closure_var pairs} Define (compile_pair {xm j}) (sequence (Reduce & (compile 'expr.xm) (write "=env[") (write (Z.show j)) (write "]") 'nil)) In (sequence (Reduce & (write "const X*env=s62(") (compile 'expr.closure_var) (write ")") (comma_pre (LIST.map pairs compile_pair)) (write ";") 'nil)) | 'decls.pairs Define (compile_pair {var maybe_init}) (sequence (Reduce & (compile 'expr.var) Match maybe_init { | 'nothing 'nil | 'just.expr (Reduce & (sequence (Reduce & (write "=") (compile 'expr.expr) 'nil)) 'nil) })) In Match pairs { | 'cons._ (sequence (Reduce & (write "X ") (comma_sep (LIST.map pairs compile_pair)) (write ";") 'nil)) } } | 'expr.expr Match expr { | 'true (write "15") | 'false (write "271") | 'num.i (write (Z.show i)) | 'empty_tuple (write "31") | 'labeled_empty_tuple.label (write (Z.show (encode_empty_variant label))) | 'alloc_labeled_value.{label expr} (sequence (Reduce & (write "s27(") (write (Z.show label)) (write ",") (compile 'expr.expr) (write ")") 'nil)) | 'remove_label.expr (sequence (Reduce & (write "s06(") (compile 'expr.expr) (write ")") 'nil)) | 'alloc_tuple.exprs Match exprs { | 'nil (compile 'expr.'empty_tuple) | 'cons._ (sequence (Reduce & (write "s78(") (write (Z.show (LIST.length exprs))) (write ",(X[]){") (comma_sep (LIST.map exprs Func expr (compile 'expr.expr))) (write "})") 'nil)) } | 'alloc_record.{layout exprs} Match exprs { | 'cons._ (sequence (Reduce & (write "s30(") (write (Z.show (LIST.length exprs))) (write ",(X[]){") (comma_sep (LIST.map exprs Func expr (compile 'expr.expr))) (write "},") (write (Z.show layout)) (write ")") 'nil)) } | 'tuple_fetch.{code i} (sequence (Reduce & (write "s68(") (compile 'expr.code) (write ",") (write (Z.show i)) (write ")") 'nil)) | 'record_fetch.{code i} (sequence (Reduce & (write "s31(") (compile 'expr.code) (write ",") (write (Z.show i)) (write ")") 'nil)) | 'iterate.{inits expr} (sequence (Reduce & (write "({__label__ l;") Match inits { | 'nil (write "U4 t=s52();") | 'cons._ (compile 'stmt.'decls.inits) } (write "l:") (compile 'expr.expr) (write ";})") 'nil)) | 'continue.stmts (sequence (Reduce & (write "({") Match stmts { | 'nil (write "s15(t);") | 'cons._ (sequence (LIST.map stmts Func stmt (compile 'stmt.stmt))) } (write "goto l;31;})") 'nil)) | 'stmt_expr.{stmts expr} (sequence (Reduce & (write "({") (sequence (LIST.map stmts Func stmt (compile 'stmt.stmt))) (compile 'expr.expr) (write ";})") 'nil)) | 'func.{i args stmts expr} Define (compile_arg arg) (sequence [(write "X ") & (compile 'expr.arg) & 'nil]) In (sequence (Reduce & (write "static X f") (write (Z.show i)) (write "(") (comma_sep (LIST.map args compile_arg)) (write "){return ") Block Let expr Match stmts { | 'nil expr | 'cons._ 'stmt_expr.{stmts expr} } In (compile 'expr.expr) (write ";}\n") 'nil)) | 'prim_app.{name args} (sequence (Reduce & (write (RUNTIME.prim_short_name name)) (write "(") (comma_sep (LIST.map args Func expr (compile 'expr.expr))) (write ")") 'nil)) | 'closure_app_known.{i func args} (sequence (Reduce & (write "f") (write (Z.show i)) (write "(") (comma_sep (LIST.map [func & args] Func expr (compile 'expr.expr))) (write ")") 'nil)) | 'closure_app.{func args} (sequence (Reduce & (write "({X c=") (compile 'expr.func) (write ";((X(*)(X") (sequence (LIST.map args Func _ (write ",X"))) (write "))s35(c,") (write (Z.show (LIST.length args))) (write "))(c") (comma_pre (LIST.map args Func arg (compile 'expr.arg))) (write ");})") 'nil)) | 'alloc_closure.{i free num_params} (sequence (Reduce & (write "s75(f") (write (Z.show i)) (write ",") (write (Z.show num_params)) (write ",") (write (Z.show (LIST.length free))) Match free { | 'nil (write ",0") | 'cons._ (sequence (Reduce & (write ",(X[]){") (comma_sep (LIST.map free Func expr (compile 'expr.expr))) (write "}") 'nil)) } (write ")") 'nil)) | 'labeled.{label expr} (sequence (Reduce & (write "({__label__ ") (compile 'expr.label) (write ";") (compile 'expr.label) (write ":") (compile 'expr.expr) (write ";})") 'nil)) | 'stuck_cond (write "s89()") | 'halt (write "s87()") | 'match.{expr_var pat_var expr clauses} Define (compile_clause clause) Match clause { | 'default.body (sequence (Reduce & (write "default:") Match body { | 'expr.expr (sequence (Reduce & (write "r=") (compile 'expr.expr) (write ";break;") 'nil)) | 'stuck (write "s53();") } 'nil)) | 'labeled.{label expr} (sequence (Reduce & (write "case ") (write (Z.show label)) (write ":r=") (compile 'expr.expr) (write ";break;") 'nil)) } In (sequence (Reduce & (write "({X r,") (compile 'expr.expr_var) (write "=") (compile 'expr.expr) (write ",") (compile 'expr.pat_var) (write "=") (compile 'expr.'remove_label.expr_var) (write ";switch(s09(") (compile 'expr.expr_var) (write ")){") (sequence (LIST.map clauses compile_clause)) (write "}r;})") 'nil)) | 'if.{test then else} (sequence (Reduce & (write "(") (compile 'expr.test) (write "==15?") (compile 'expr.then) (write ":") (compile 'expr.else) (write ")") 'nil)) | 'x.i (sequence [(write "x") & (write (Z.show i)) & 'nil]) | 'c.i (sequence [(write "c") & (write (Z.show i)) & 'nil]) | 'p.i (sequence [(write "p") & (write (Z.show i)) & 'nil]) } } In Func expr Unfold term From (compile 'expr.expr) Begin Match term { | 'write.s (write s) | 'sequence.terms Iterate terms Begin Match terms { | 'nil | 'cons.{term terms} (Fold term) (Continue terms) } | 'compile.term (Fold (compile term)) } Where Define (encode_empty_variant label) [[label * 256] + 47] Where Open Z { :Infix + :Infix * } Open LIST {:Infix &} Where Let IO Package "io" Let LIST Package "list" Let OS Package "os" Let QUEUE Package "queue" Let RUNTIME Package "runtime" Let SEARCH Package "search" Let STDIO Package "stdio" Let STRING Package "string" Let Z Package "z"