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comparison parser.js @ 122:9820ecd4eed4

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Add support for implementing operators on user defined objects
author Mike Pavone <pavone@retrodev.com>
date Sat, 03 Aug 2013 00:13:09 -0700
parents 648659961e0e
children 34e0befbdd77
comparison
equal deleted inserted replaced
121:1a4446f573d3 122:9820ecd4eed4
68 function isLambda(node) 68 function isLambda(node)
69 { 69 {
70 return node instanceof lambda; 70 return node instanceof lambda;
71 } 71 }
72 72
73 var grammar = 73 var grammar =
74 'start = ws module:(object / lambda) ws { return module; };' + 74 'start = ws module:(object / lambda) ws { return module; };' +
75 'ws = ([ \\t\\n\\r] / "//" [^\\n]* "\\n")*;' + 75 'ws = ([ \\t\\n\\r] / "//" [^\\n]* "\\n")*;' +
76 'hws = ([ \\t] / "/*" ([^*] / "*" ! "/")* "*/" )*;' + 76 'hws = ([ \\t] / "/*" ([^*] / "*" ! "/")* "*/" )*;' +
77 'expr = e:(funcall / methcall / opexpr) ws { return e; };' + 77 'expr = e:(funcall / methcall / opexpr) ws { return e; };' +
78 'opexpr = left:compareop pieces:(hws ("&&" / "||") hws compareop)* { if (pieces.length) { var cur = new op(left, pieces[0][1], pieces[0][3]); for (var i = 1; i < pieces.length; i++) { cur = new op(cur, pieces[i][1], pieces[i][3]); } return cur; } else { return left; } };'+ 78 'opexpr = left:compareop pieces:(hws ("&&" / "||") hws compareop)* { if (pieces.length) { var cur = new op(left, pieces[0][1], pieces[0][3]); for (var i = 1; i < pieces.length; i++) { cur = new op(cur, pieces[i][1], pieces[i][3]); } return cur; } else { return left; } };'+
84 'float = digits:[0-9]+ "." decimals:[0-9]+ { return new floatlit(parseFloat(digits.join("") + "." + decimals.join(""))); };' + 84 'float = digits:[0-9]+ "." decimals:[0-9]+ { return new floatlit(parseFloat(digits.join("") + "." + decimals.join(""))); };' +
85 'binary = "0b" digits:[01]+ { return new intlit(parseInt(digits.join(""), 2)); };' + 85 'binary = "0b" digits:[01]+ { return new intlit(parseInt(digits.join(""), 2)); };' +
86 'hex = "0x" digits:[0-9a-fA-F]+ { return new intlit(parseInt(digits.join(""), 16)); };' + 86 'hex = "0x" digits:[0-9a-fA-F]+ { return new intlit(parseInt(digits.join(""), 16)); };' +
87 'int = sign:"-"? digits:[0-9]+ { return new intlit(parseInt(sign + digits.join(""), 10)); };' + 87 'int = sign:"-"? digits:[0-9]+ { return new intlit(parseInt(sign + digits.join(""), 10)); };' +
88 'string = "\\"" text:(strpart/escape)* "\\"" { return new strlit(text.join("")); };' + 88 'string = "\\"" text:(strpart/escape)* "\\"" { return new strlit(text.join("")); };' +
89 'strpart = text:[^\\"\\\\]+ { return text.join(""); };' + 89 'strpart = text:[^\\"\\\\]+ { return text.join(""); };' +
90 'escape = "\\\\" char:[nt\\"r\\\\] { if (char == "n") { return "\\n"; } if (char == "r") { return "\\r"; } return char; };' + 90 'escape = "\\\\" char:[nt\\"r\\\\] { if (char == "n") { return "\\n"; } if (char == "r") { return "\\r"; } return char; };' +
91 'object = "#{" ws messages:(assignment / funexpr)* "}" { return new object(messages); };' + 91 'object = "#{" ws messages:(assignment / funexpr)* "}" { return new object(messages); };' +
92 'array = "#[" ws els:opexpr* "]" { return new arraylit(els); };' + 92 'array = "#[" ws els:opexpr* "]" { return new arraylit(els); };' +
93 'list = "[" ws els:opexpr* "]" { return new listlit(els); };' + 93 'list = "[" ws els:opexpr* "]" { return new listlit(els); };' +
94 'assignment = ws sym:symbol hws "<-" expr:expr ws { return new assignment(sym, expr); }' + 94 'opsym = name:("&&" / "||" / "<=" / ">=" / "<" / ">" / "=" / "!=" / "+" / "-" / "." / "*" / "/" / "%") { return new symbol(name); };' +
95 'assignment = ws sym:(symbol / opsym) hws "<-" expr:expr ws { return new assignment(sym, expr); }' +
95 'lambda = args:((& ":") argname+ )? "{" ws exprs:(assignment / expr)* "}" { return new lambda(args[1], exprs); };' + 96 'lambda = args:((& ":") argname+ )? "{" ws exprs:(assignment / expr)* "}" { return new lambda(args[1], exprs); };' +
96 'argname = init:":"? chars:[a-zA-Z_!?@]+ trailing:[a-zA-Z_!?@0-9]* hws { return new symbol(init + chars.join("") + trailing.join("")); };' + 97 'argname = init:":"? chars:[a-zA-Z_!?@]+ trailing:[a-zA-Z_!?@0-9]* hws { return new symbol(init + chars.join("") + trailing.join("")); };' +
97 'funexpr = f: funcall ws { return f; };' + 98 'funexpr = f: funcall ws { return f; };' +
98 'funcall = hws parts: funcallpart+ { var fun = ""; var args = []; for (var i = 0; i < parts.length; i++) { fun += parts[i].name; args = args.concat(parts[i].args); } return new funcall(fun, args); };' + 99 'funcall = hws parts: funcallpart+ { var fun = ""; var args = []; for (var i = 0; i < parts.length; i++) { fun += parts[i].name; args = args.concat(parts[i].args); } return new funcall(fun, args); };' +
99 'funcallpart = fun:funpart args:opexpr* hws { return { name: fun, args: args}; };' + 100 'funcallpart = fun:funpart args:opexpr* hws { return { name: fun, args: args}; };' +