Mercurial > repos > tabletprog
comparison parser.js @ 122:9820ecd4eed4
Add support for implementing operators on user defined objects
author | Mike Pavone <pavone@retrodev.com> |
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date | Sat, 03 Aug 2013 00:13:09 -0700 |
parents | 648659961e0e |
children | 34e0befbdd77 |
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121:1a4446f573d3 | 122:9820ecd4eed4 |
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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}; };' + |