Mercurial > repos > tabletprog
comparison parser.js @ 214:e01137a97654
Make assignments an expression in the grammar
author | Michael Pavone <pavone@retrodev.com> |
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date | Fri, 06 Dec 2013 19:19:54 -0800 |
parents | 810edf474f86 |
children | adad61ea2f3a |
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213:e00a8bc6361b | 214:e01137a97654 |
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80 | 80 |
81 var grammar = | 81 var grammar = |
82 'start = ws module:(object / lambda) ws { return module; };' + | 82 'start = ws module:(object / lambda) ws { return module; };' + |
83 'ws = ([ \\t\\n\\r] / "//" [^\\n]* "\\n")*;' + | 83 'ws = ([ \\t\\n\\r] / "//" [^\\n]* "\\n")*;' + |
84 'hws = ([ \\t] / "/*" ([^*] / "*" ! "/")* "*/" )*;' + | 84 'hws = ([ \\t] / "/*" ([^*] / "*" ! "/")* "*/" )*;' + |
85 'expr = e:(funcall / methcall / opexpr) ws { return e; };' + | 85 'expr = e:(funcall / methcall / assignment / opexpr) ws { return e; };' + |
86 '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; } };'+ | 86 '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; } };'+ |
87 'compareop = left:maybecons pieces:(hws ("<=" / ">=" / "<" / ">" / "=" / "!=") hws maybecons)* { 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; } };'+ | 87 'compareop = left:maybecons pieces:(hws ("<=" / ">=" / "<" / ">" / "=" / "!=") hws maybecons)* { 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; } };'+ |
88 'maybecons = consop / addsub;' + | 88 'maybecons = consop / addsub;' + |
89 'consop = left:addsub hws "|" hws right:maybecons { return new op(left, "|", right); };'+ | 89 'consop = left:addsub hws "|" hws right:maybecons { return new op(left, "|", right); };'+ |
90 'addsub = left:muldiv pieces:(hws ("+"/"-"/"xor"/"and"/"or"/".") hws muldiv)* { 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; } };'+ | 90 'addsub = left:muldiv pieces:(hws ("+"/"-"/"xor"/"and"/"or"/".") hws muldiv)* { 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; } };'+ |
101 'object = "#{" ws messages:(assignment / funexpr)* "}" { return new object(messages); };' + | 101 'object = "#{" ws messages:(assignment / funexpr)* "}" { return new object(messages); };' + |
102 'array = "#[" ws els:expr* "]" { return new arraylit(els); };' + | 102 'array = "#[" ws els:expr* "]" { return new arraylit(els); };' + |
103 'list = "[" ws els:expr* "]" { return new listlit(els); };' + | 103 'list = "[" ws els:expr* "]" { return new listlit(els); };' + |
104 'opsym = name:("&&" / "||" / "<=" / ">=" / "<" / ">" / "=" / "!=" / "+" / "-" / "." / "*" / "/" / "%" / "|") { return new symbol(name); };' + | 104 'opsym = name:("&&" / "||" / "<=" / ">=" / "<" / ">" / "=" / "!=" / "+" / "-" / "." / "*" / "/" / "%" / "|") { return new symbol(name); };' + |
105 'assignment = ws sym:(opsym / symbol) hws "<-" expr:expr ws { return new assignment(sym, expr); }' + | 105 'assignment = ws sym:(opsym / symbol) hws "<-" expr:expr ws { return new assignment(sym, expr); }' + |
106 'lambda = args:((& ":") argname+ )? "{" ws exprs:(assignment / expr)* "}" { return new lambda(args[1], exprs); };' + | 106 'lambda = args:((& ":") argname+ )? "{" ws exprs:expr* "}" { return new lambda(args[1], exprs); };' + |
107 'argname = init:":"? chars:[a-zA-Z_!?@]+ trailing:[a-zA-Z_!?@0-9]* hws { return new symbol(init + chars.join("") + trailing.join("")); };' + | 107 'argname = init:":"? chars:[a-zA-Z_!?@]+ trailing:[a-zA-Z_!?@0-9]* hws { return new symbol(init + chars.join("") + trailing.join("")); };' + |
108 'funexpr = f: funcall ws { return f; };' + | 108 'funexpr = f: funcall ws { return f; };' + |
109 '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); };' + | 109 '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); };' + |
110 'funcallpart = fun:funpart args:opexpr* hws { return { name: fun, args: args}; };' + | 110 'funcallpart = fun:funpart args:opexpr* hws { return { name: fun, args: args}; };' + |
111 'funpart = chars:[a-zA-Z_!?@]+ middle:[a-zA-Z_!?@0-9]* ":" & [ \\t\\n\\r] { return chars.join("") + middle.join("") + ":"; };' + | 111 'funpart = chars:[a-zA-Z_!?@]+ middle:[a-zA-Z_!?@0-9]* ":" & [ \\t\\n\\r] { return chars.join("") + middle.join("") + ":"; };' + |