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Overview
Comment:Allow arguments to numeric arithmetic/bitwise macros to be directions and keys as well as numbers.
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SHA1: ee285414daaeb4d7703d5744fc9870a7c7ecdf3e
User & Date: user on 2023-03-29 19:48:27
Other Links: manifest | tags
Context
2023-03-29
23:46
Correct a memory leak in the recent change to the {edit} macro check-in: 54b97e96bb user: user tags: trunk
19:48
Allow arguments to numeric arithmetic/bitwise macros to be directions and keys as well as numbers. check-in: ee285414da user: user tags: trunk
03:22
Add the variant of the {edit} macro to edit an argument of a macro which is currently being expanded. check-in: 0548d34afe user: user tags: trunk
Changes
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Modified class.c from [16b649f4e6] to [9cd1ad3346].

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          begin_macro(macros[glohash[tokenv].id-0xC000]);
          goto again;
        case MAC_ADD:
          n=0;
          for(;;) {
            nxttok();
            if(tokent==TF_MACRO+TF_CLOSE) break;
            if(tokent!=TF_INT) ParseError("Number expected\n");
            if(tokent!=TF_INT && tokent!=TF_NAME+TF_DIR && tokent!=TF_NAME+TF_KEY) ParseError("Number expected\n");
            n+=tokenv;
          }
          tokent=TF_INT;
          tokenv=n;
          break;
        case MAC_SUB:
          nxttok();
          if(tokent!=TF_INT) ParseError("Number expected\n");
          if(tokent!=TF_INT && tokent!=TF_NAME+TF_DIR && tokent!=TF_NAME+TF_KEY) ParseError("Number expected\n");
          n=tokenv;
          nxttok();
          if(tokent!=TF_INT) ParseError("Number expected\n");
          if(tokent!=TF_INT && tokent!=TF_NAME+TF_DIR && tokent!=TF_NAME+TF_KEY) ParseError("Number expected\n");
          n-=tokenv;
          nxttok();
          if(tokent!=TF_MACRO+TF_CLOSE) ParseError("Too many macro arguments\n");
          tokent=TF_INT;
          tokenv=n;
          break;
        case MAC_MUL:
          n=1;
          for(;;) {
            nxttok();
            if(tokent==TF_MACRO+TF_CLOSE) break;
            if(tokent!=TF_INT) ParseError("Number expected\n");
            if(tokent!=TF_INT && tokent!=TF_NAME+TF_DIR && tokent!=TF_NAME+TF_KEY) ParseError("Number expected\n");
            n*=tokenv;
          }
          tokent=TF_INT;
          tokenv=n;
          break;
        case MAC_DIV:
          nxttok();
          if(tokent!=TF_INT) ParseError("Number expected\n");
          if(tokent!=TF_INT && tokent!=TF_NAME+TF_DIR && tokent!=TF_NAME+TF_KEY) ParseError("Number expected\n");
          n=tokenv;
          nxttok();
          if(tokent!=TF_INT) ParseError("Number expected\n");
          if(tokent!=TF_INT && tokent!=TF_NAME+TF_DIR && tokent!=TF_NAME+TF_KEY) ParseError("Number expected\n");
          if(!tokenv) ParseError("Division by zero\n");
          n/=tokenv;
          nxttok();
          if(tokent!=TF_MACRO+TF_CLOSE) ParseError("Too many macro arguments\n");
          tokent=TF_INT;
          tokenv=n;
          break;
        case MAC_MOD:
          nxttok();
          if(tokent!=TF_INT) ParseError("Number expected\n");
          if(tokent!=TF_INT && tokent!=TF_NAME+TF_DIR && tokent!=TF_NAME+TF_KEY) ParseError("Number expected\n");
          n=tokenv;
          nxttok();
          if(tokent!=TF_INT) ParseError("Number expected\n");
          if(tokent!=TF_INT && tokent!=TF_NAME+TF_DIR && tokent!=TF_NAME+TF_KEY) ParseError("Number expected\n");
          if(!tokenv) ParseError("Division by zero\n");
          n%=tokenv;
          nxttok();
          if(tokent!=TF_MACRO+TF_CLOSE) ParseError("Too many macro arguments\n");
          tokent=TF_INT;
          tokenv=n;
          break;
        case MAC_BAND:
          n=-1;
          for(;;) {
            nxttok();
            if(tokent==TF_MACRO+TF_CLOSE) break;
            if(tokent!=TF_INT) ParseError("Number expected\n");
            if(tokent!=TF_INT && tokent!=TF_NAME+TF_DIR && tokent!=TF_NAME+TF_KEY) ParseError("Number expected\n");
            n&=tokenv;
          }
          tokent=TF_INT;
          tokenv=n;
          break;
        case MAC_BOR:
          n=0;
          for(;;) {
            nxttok();
            if(tokent==TF_MACRO+TF_CLOSE) break;
            if(tokent!=TF_INT) ParseError("Number expected\n");
            if(tokent!=TF_INT && tokent!=TF_NAME+TF_DIR && tokent!=TF_NAME+TF_KEY) ParseError("Number expected\n");
            n|=tokenv;
          }
          tokent=TF_INT;
          tokenv=n;
          break;
        case MAC_BXOR:
          n=0;
          for(;;) {
            nxttok();
            if(tokent==TF_MACRO+TF_CLOSE) break;
            if(tokent!=TF_INT) ParseError("Number expected\n");
            if(tokent!=TF_INT && tokent!=TF_NAME+TF_DIR && tokent!=TF_NAME+TF_KEY) ParseError("Number expected\n");
            n^=tokenv;
          }
          tokent=TF_INT;
          tokenv=n;
          break;
        case MAC_BNOT:
          nxttok();
          if(tokent!=TF_INT) ParseError("Number expected\n");
          if(tokent!=TF_INT && tokent!=TF_NAME+TF_DIR && tokent!=TF_NAME+TF_KEY) ParseError("Number expected\n");
          n=~tokenv;
          nxttok();
          if(tokent!=TF_MACRO+TF_CLOSE) ParseError("Too many macro arguments\n");
          tokent=TF_INT;
          tokenv=n;
          break;
        case MAC_CAT:
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          free(s);
          ReturnToken(TF_NAME|TF_ABNORMAL,OP_STRING);
        case MAC_BIT:
          n=0;
          for(;;) {
            nxttok();
            if(tokent==TF_MACRO+TF_CLOSE) break;
            if(tokent!=TF_INT) ParseError("Number expected\n");
            if(tokent!=TF_INT && tokent!=TF_NAME+TF_DIR && tokent!=TF_NAME+TF_KEY) ParseError("Number expected\n");
            if(tokenv<32) n|=1<<tokenv;
          }
          tokent=TF_INT;
          tokenv=n;
          break;
        case MAC_MAKE:
          nxttok();
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          if(!macros) ParseError("Cannot edit nonexistent macro\n");
          nxttok();
          if(tokent==TF_INT) {
            if(!macstack) ParseError("Empty macro stack\n");
            n=tokenv-1;
            nxttok();
            if(n<0 || macstack->n<=n || !macstack->args[n]) ParseError("Cannot edit nonexistent argument %u\n",n+1);
            if(macstack->args[n]->t&(TF_MACRO|TF_EOF)) ParseError("Invalid edit token\n");
            macstack->args[n]->t=tokent;
            macstack->args[n]->v=tokenv;
            macstack->args[n]->str=0;
            if(*tokenstr) {
              macstack->args[n]->str=strdup(tokenstr);
              if(!macstack->args[n]->str) fatal("Allocation failed\n");
            }
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Modified class.doc from [f144cf4bb5] to [33a36637f2].

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{mod <number> <number>}
  Modulo.

{version <number>}
  Expands into nothing. The number must be zero, otherwise it is an error.
  Future versions of Free Hero Mesh may change this.

All arithmetic/bitwise macros also allow their arguments to be directions
and keys, in which case they are treated as the corresponding numbers.

It is possible to implement a tag system in this preprocessor, which makes
it Turing complete. For example:

  {define "skip" {call \2}}
  {define "1" {skip \1|"3"|"3"|"2"|"1"|"H"}}
  {define "2" {skip \1|"3"|"3"|"1"}}
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