🎨 improve error log output format.

nasal_builtin.h

@@ -93,7 +93,7 @@ nas_ref builtin_system(nas_ref* local,nasal_gc& gc)
 {
     nas_ref str=local[1];
     if(str.type!=vm_str)
-        return nas_err("system","\"str\" must be string");
+        return {vm_num,(f64)-1};
     return {vm_num,(f64)system(str.str().c_str())};
 }
 nas_ref builtin_input(nas_ref* local,nasal_gc& gc)
@@ -110,7 +110,7 @@ nas_ref builtin_fin(nas_ref* local,nasal_gc& gc)
 {
     nas_ref val=local[1];
     if(val.type!=vm_str)
-        return nas_err("io.fin","\"filename\" must be string");
+        return nas_err("io::fin","\"filename\" must be string");
     std::ifstream fin(val.str(),std::ios::binary);
     std::stringstream rd;
     if(!fin.fail())
@@ -122,12 +122,12 @@ nas_ref builtin_fout(nas_ref* local,nasal_gc& gc)
     nas_ref val=local[1];
     nas_ref str=local[2];
     if(val.type!=vm_str)
-        return nas_err("io.fout","\"filename\" must be string");
+        return nas_err("io::fout","\"filename\" must be string");
     if(str.type!=vm_str)
-        return nas_err("io.fout","\"str\" must be string");
+        return nas_err("io::fout","\"str\" must be string");
     std::ofstream fout(val.str());
     if(fout.fail())
-        return nas_err("io.fout","cannot open <"+val.str()+">");
+        return nas_err("io::fout","cannot open <"+val.str()+">");
     fout<<str.str();
     return nil;
 }
@@ -389,8 +389,7 @@ nas_ref builtin_die(nas_ref* local,nasal_gc& gc)
     nas_ref str=local[1];
     if(str.type!=vm_str)
         return nas_err("die","\"str\" must be string");
-    std::cerr<<bold_cyan<<"[vm] "
-             <<bold_red<<"error: "
+    std::cerr<<bold_red<<"[vm] error: "
              <<bold_white<<str.str()<<'\n'
              <<reset;
     return {vm_none};
@@ -399,11 +398,7 @@ nas_ref builtin_find(nas_ref* local,nasal_gc& gc)
 {
     nas_ref needle=local[1];
     nas_ref haystack=local[2];
-    if(needle.type!=vm_str)
-        return nas_err("find","\"needle\" must be string");
-    if(haystack.type!=vm_str)
-        return nas_err("find","\"haystack\" must be string");
-    usize pos=haystack.str().find(needle.str());
+    usize pos=haystack.tostr().find(needle.tostr());
     if(pos==string::npos)
         return {vm_num,(f64)-1};
     return {vm_num,(f64)pos};
@@ -479,10 +474,8 @@ nas_ref builtin_cmp(nas_ref* local,nasal_gc& gc)
 {
     nas_ref a=local[1];
     nas_ref b=local[2];
-    if(a.type!=vm_str)
-        return nas_err("cmp","\"a\" must be string");
-    if(b.type!=vm_str)
-        return nas_err("cmp","\"b\" must be string");
+    if(a.type!=vm_str || b.type!=vm_str)
+        return nas_err("cmp","\"a\" and \"b\" must be string");
     return {vm_num,(f64)strcmp(a.str().c_str(),b.str().c_str())};
 }
 nas_ref builtin_chr(nas_ref* local,nasal_gc& gc)

nasal_codegen.h

@@ -1,6 +1,7 @@
 #ifndef __NASAL_CODEGEN_H__
 #define __NASAL_CODEGEN_H__
 
+#include "nasal_err.h"
 #include <iomanip>
 #include <list>
 #include <stack>
@@ -136,7 +137,7 @@ void opcode::print(const char* header,
                    const u32 index,
                    bool deftnum=false) const
 {
-    std::cout<<header<<std::hex<<"0x"
+    std::cout<<bold_cyan<<header<<reset<<std::hex<<"0x"
              <<std::setw(8)<<std::setfill('0')<<index<<":       "
              <<std::setw(2)<<std::setfill('0')<<(u32)op<<" "
              <<std::setw(2)<<std::setfill('0')<<((num>>24)&0xff)<<" "

nasal_dbg.h

@@ -1,6 +1,7 @@
 #ifndef __NASAL_DBG_H__
 #define __NASAL_DBG_H__
 
+#include "nasal_err.h"
 #include "nasal_vm.h"
 #include <algorithm>
 
@@ -119,7 +120,7 @@ void nasal_dbg::stepinfo()
     begin=(line>>3)==0?0:((line>>3)<<3);
     end=(1+(line>>3))<<3;
     for(u32 i=begin;i<end && i<src.size();++i)
-        std::cout<<(i==line?"-->  ":"     ")<<src[i]<<"\n";
+        std::cout<<bold_cyan<<(i==line?"-->  ":"     ")<<reset<<src[i]<<"\n";
     std::cout<<"next bytecode:\n";
     begin=(pc>>3)==0?0:((pc>>3)<<3);
     end=(1+(pc>>3))<<3;
@@ -134,7 +135,8 @@ void nasal_dbg::interact()
     if(bytecode[pc].op==op_intg)
     {
         std::cout
-        <<"[debug] nasal debug mode\n"
+        <<bold_cyan<<"[debug] "<<reset
+        <<"nasal debug mode\n"
         <<"input \'h\' to get help\n";
     }
     else if(bytecode[pc].op==op_exit)
@@ -308,7 +310,7 @@ vmexit:
     callsort(count);
     gc.clear();
     imm.clear();
-    std::cout<<"[debug] debugger exited\n";
+    std::cout<<bold_cyan<<"[debug] "<<reset<<"debugger exited\n";
     return;
 #ifndef _MSC_VER
 #define dbg(op,num) {\

nasal_err.h

@@ -77,7 +77,7 @@ public:
         std::ifstream fin(f,std::ios::binary);
         if(fin.fail())
         {
-            std::cerr<<bold_cyan<<"[src] "<<reset<<"cannot open file <"<<f<<">\n";
+            std::cerr<<bold_red<<"src: "<<reset<<"cannot open <"<<f<<">\n";
             std::exit(1);
         }
         string line;
@@ -101,30 +101,47 @@ class nasal_err:public fstreamline
 {
 private:
     u32 error;
+    string identation(usize len)
+    {
+        string tmp="";
+        tmp.resize(len,' ');
+        return tmp;
+    }
 public:
     nasal_err():error(0){}
     void err(const char* stage,const string& info)
     {
         ++error;
-        std::cerr<<bold_cyan<<"["<<stage<<"] "<<reset<<info<<"\n";
+        std::cerr<<bold_red<<stage<<": "
+                 <<bold_white<<info<<reset<<"\n\n";
     }
     void err(const char* stage,u32 line,u32 column,const string& info)
     {
         ++error;
         const string& code=res[line-1];
-        std::cerr<<bold_cyan<<"["<<stage<<"] "
-                 <<bold_orange<<file<<":"<<line<<":"<<column<<" "
-                 <<bold_white<<info<<reset<<"\n"<<code<<"\n";
+        const string ident=identation(std::to_string(line).length());
+        std::cerr<<bold_red<<stage<<": "
+                 <<bold_white<<info<<reset<<"\n"
+                 <<bold_cyan<<" --> "<<reset
+                 <<bold_orange<<file<<":"<<line<<":"<<column<<"\n"
+                 <<bold_cyan<<ident<<" | "<<reset<<"\n"
+                 <<bold_cyan<<line<<" | "<<reset<<code<<"\n"
+                 <<bold_cyan<<ident<<" | "<<reset;
         for(i32 i=0;i<(i32)column-1;++i)
             std::cerr<<char(" \t"[code[i]=='\t']);
-        std::cerr<<bold_red<<"^\n"<<reset;
+        std::cerr<<bold_red<<"^ "<<info<<reset<<"\n\n";
     }
     void err(const char* stage,u32 line,const string& info)
     {
         ++error;
-        std::cerr<<bold_cyan<<"["<<stage<<"] "
-                 <<bold_orange<<file<<":"<<line<<" "
-                 <<bold_white<<info<<reset<<"\n"<<res[line-1]<<'\n';
+        const string ident=identation(std::to_string(line).length());
+        std::cerr<<bold_red<<stage<<": "
+                 <<bold_white<<info<<reset<<"\n"
+                 <<bold_cyan<<" --> "<<reset
+                 <<bold_orange<<file<<":"<<line<<"\n"
+                 <<bold_cyan<<ident<<" | "<<reset<<"\n"
+                 <<bold_cyan<<line<<" | "<<reset<<res[line-1]<<"\n"
+                 <<bold_cyan<<ident<<" | "<<reset<<"\n\n";
     }
     void chkerr(){if(error)std::exit(1);}
 };

nasal_gc.h

@@ -723,8 +723,7 @@ void nasal_gc::ctxreserve()
 // use to print error log and return error value
 nas_ref nas_err(const string& err_f,const string& info)
 {
-    std::cerr<<bold_cyan<<"[vm] "
-             <<bold_red<<err_f<<": "
+    std::cerr<<bold_red<<"[vm] "<<err_f<<": "
              <<bold_white<<info<<"\n"
              <<reset;
     return {vm_none};

nasal_vm.h

@@ -317,8 +317,7 @@ void nasal_vm::detail()
 [[noreturn]]
 void nasal_vm::die(const string& str)
 {
-    std::cout<<bold_cyan<<"[vm] "
-             <<bold_red<<"error: "
+    std::cout<<bold_red<<"[vm] error: "
              <<bold_white<<str<<"\n"
              <<reset;
     traceback();