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annotate tpi.js @ 251:2557ce4e671f

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Fix a couple of compiler bugs. topenv was getting initialized in multiple places. This resulted in multiple copies of modules getting created which caused problems for macro expansion. Additionally, arguments were not being marked as declared during code generation so assigning to an argument that was not closed over generated invalid C code.
author Michael Pavone <pavone@retrodev.com>
date Fri, 11 Apr 2014 22:29:32 -0700
parents 60eff5f81d9a
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 var module = {exports: {}};
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2 var console = {log: function(text){}};
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3 var PEG;
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4
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5 var file = null;
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6 var argtype = 'normal';
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7 var includes = ['.'];
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8 var basedir = '';
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9 var debugmode = false;
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10 for (var i = 0; i < arguments.length; i++) {
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11 switch (argtype) {
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12 case 'normal':
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13 switch (arguments[i]) {
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14 case '-basedir':
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15 case '-i':
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16 case '-interpdebug':
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17 debugmode = true;
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18 break;
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19 default:
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20 if (arguments[i].charAt(0) == '-') {
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21 print("unrecognized switch", arguments[i]);
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22 quit(1);
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23 }
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24 file = arguments[i];
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25 }
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26 break;
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27 case '-basedir':
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28 if (basedir == '') {
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29 basedir = arguments[i];
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30 argtype = 'normal';
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31 } else {
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32 print("only one -basedir option allowed");
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33 quit(1);
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34 }
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35 break;
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36 case '-i':
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37 includes.push(arguments[i]);
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38 argtype = 'normal';
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39 break;
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40 case '-backend':
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41 backend = arguments[i];
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42 argtype = 'normal';
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43 break;
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44 }
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45 }
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46 if (argtype != 'normal') {
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47 print("switch", argtype, "expects a parameter");
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48 quit(1);
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49 }
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50
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51 if (!file) {
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52 print('usage: d8 tpi.js -- filename');
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53 quit(1);
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54 }
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55 includes.push(basedir + 'modules');
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56 interpFile(file, basedir, includes, debugmode);
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57
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58
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59 function parseFile(filename)
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60 {
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61 debugprint('//parsing', filename);
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62 var text = read(filename);
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63 try {
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64 var parsed = parser.parse(text);
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65 } catch (error) {
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66 print('SyntaxError on at', error.line, ',', error.column, ':', error.message);
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67 var lines = text.split('\n');
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68 print(lines[error.line-1]);
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69 var spacer = '';
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70 for (var i = 1; i < error.column; i++) {
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71 if (lines[error.line-1].charAt(i-1) == '\t') {
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72 spacer += ' ';
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73 } else {
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74 spacer += ' ';
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75 }
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76 }
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77 print(spacer + '^');
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78 quit(1);
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79 }
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80 return parsed;
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81 }
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82
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83
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84 function interpFile(filename, basedir, includes, debugmode)
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85 {
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86 load(basedir + 'mquery.js');
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87 load(basedir + 'peg.js');
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88 PEG = module.exports;
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89 load(basedir + 'parser.js');
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90 load(basedir + 'interp.js');
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91
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92 if (debugmode) {
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93 debugprint = print;
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94 } else {
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95 debugprint = function() {};
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96 }
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97 var parsed = parseFile(filename);
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98
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99 toplevel = new topenv(includes);
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100
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101 parsed = parsed.macroexpand(toplevel);
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102 var mainModule = parsed.eval(toplevel);
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103 return mainModule.tpmeth_main();
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104 }