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authorAndre Murbach Maidl <andremm@gmail.com>2015-10-04 20:10:05 -0300
committerAndre Murbach Maidl <andremm@gmail.com>2015-10-04 20:10:05 -0300
commit781fd9653ed0a89dd8f3d8ccfab63e249f1edb07 (patch)
tree298232c6c2585b49bc1c03e89aa9428d95d9f403 /examples/typedlua/tlparser.lua
parent8ac31b94b88227222b189c447aeea1b4131eed18 (diff)
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Adding Typed Lua parser
Diffstat (limited to 'examples/typedlua/tlparser.lua')
-rw-r--r--examples/typedlua/tlparser.lua228
1 files changed, 228 insertions, 0 deletions
diff --git a/examples/typedlua/tlparser.lua b/examples/typedlua/tlparser.lua
new file mode 100644
index 0000000..002e580
--- /dev/null
+++ b/examples/typedlua/tlparser.lua
@@ -0,0 +1,228 @@
1local tlparser = {}
2
3local lpeg = require "lpeglabel"
4lpeg.locale(lpeg)
5
6local tllexer = require "tllexer"
7
8local function chainl1 (pat, sep)
9 return pat * (sep * pat)^0
10end
11
12local G = lpeg.P { "TypedLua";
13 TypedLua = tllexer.Shebang^-1 * tllexer.Skip * lpeg.V("Chunk") * -1;
14 -- type language
15 Type = lpeg.V("NilableType");
16 NilableType = lpeg.V("UnionType") * tllexer.symb("?")^-1;
17 UnionType = lpeg.V("PrimaryType") * (tllexer.symb("|") * lpeg.V("PrimaryType"))^0;
18 PrimaryType = lpeg.V("LiteralType") +
19 lpeg.V("BaseType") +
20 lpeg.V("NilType") +
21 lpeg.V("ValueType") +
22 lpeg.V("AnyType") +
23 lpeg.V("SelfType") +
24 lpeg.V("FunctionType") +
25 lpeg.V("TableType") +
26 lpeg.V("VariableType");
27 LiteralType = tllexer.token("false") +
28 tllexer.token("true") +
29 tllexer.token(tllexer.Number) +
30 tllexer.token(tllexer.String);
31 BaseType = tllexer.token("boolean") +
32 tllexer.token("number") +
33 tllexer.token("string") +
34 tllexer.token("integer");
35 NilType = tllexer.token("nil");
36 ValueType = tllexer.token("value");
37 AnyType = tllexer.token("any");
38 SelfType = tllexer.token("self");
39 FunctionType = lpeg.V("InputType") * tllexer.symb("->") * lpeg.V("NilableTuple");
40 MethodType = lpeg.V("InputType") * tllexer.symb("=>") * lpeg.V("NilableTuple");
41 InputType = tllexer.symb("(") * lpeg.V("TupleType")^-1 * tllexer.symb(")");
42 NilableTuple = lpeg.V("UnionlistType") * tllexer.symb("?")^-1;
43 UnionlistType = lpeg.V("OutputType") * (tllexer.symb("|") * lpeg.V("OutputType"))^0;
44 OutputType = tllexer.symb("(") * lpeg.V("TupleType")^-1 * tllexer.symb(")");
45 TupleType = lpeg.V("Type") * (tllexer.symb(",") * lpeg.V("Type"))^0 * tllexer.symb("*")^-1;
46 TableType = tllexer.symb("{") * lpeg.V("TableTypeBody")^-1 * tllexer.symb("}");
47 TableTypeBody = lpeg.V("RecordType") +
48 lpeg.V("HashType") +
49 lpeg.V("ArrayType");
50 RecordType = lpeg.V("RecordField") * (tllexer.symb(",") * lpeg.V("RecordField"))^0 *
51 (tllexer.symb(",") * (lpeg.V("HashType") + lpeg.V("ArrayType")))^-1;
52 RecordField = tllexer.kw("const")^-1 *
53 lpeg.V("LiteralType") * tllexer.symb(":") * lpeg.V("Type");
54 HashType = lpeg.V("KeyType") * tllexer.symb(":") * lpeg.V("FieldType");
55 ArrayType = lpeg.V("FieldType");
56 KeyType = lpeg.V("BaseType") + lpeg.V("ValueType") + lpeg.V("AnyType");
57 FieldType = lpeg.V("Type");
58 VariableType = tllexer.token(tllexer.Name);
59 RetType = lpeg.V("NilableTuple") +
60 lpeg.V("Type");
61 Id = tllexer.token(tllexer.Name);
62 TypeDecId = (tllexer.kw("const") * lpeg.V("Id")) +
63 lpeg.V("Id");
64 IdList = lpeg.V("TypeDecId") * (tllexer.symb(",") * lpeg.V("TypeDecId"))^0;
65 IdDec = lpeg.V("IdList") * tllexer.symb(":") *
66 (lpeg.V("Type") + lpeg.V("MethodType"));
67 IdDecList = (lpeg.V("IdDec")^1)^-1;
68 TypeDec = tllexer.token(tllexer.Name) * lpeg.V("IdDecList") * tllexer.kw("end");
69 Interface = tllexer.kw("interface") * lpeg.V("TypeDec") +
70 tllexer.kw("typealias") * tllexer.token(tllexer.Name) * tllexer.symb("=") * lpeg.V("Type");
71 -- parser
72 Chunk = lpeg.V("Block");
73 StatList = (tllexer.symb(";") + lpeg.V("Stat"))^0;
74 Var = lpeg.V("Id");
75 TypedId = tllexer.token(tllexer.Name) * (tllexer.symb(":") * lpeg.V("Type"))^-1;
76 FunctionDef = tllexer.kw("function") * lpeg.V("FuncBody");
77 FieldSep = tllexer.symb(",") + tllexer.symb(";");
78 Field = ((tllexer.symb("[") * lpeg.V("Expr") * tllexer.symb("]")) +
79 (tllexer.token(tllexer.Name))) *
80 tllexer.symb("=") * lpeg.V("Expr") +
81 lpeg.V("Expr");
82 TField = (tllexer.kw("const") * lpeg.V("Field")) +
83 lpeg.V("Field");
84 FieldList = (lpeg.V("TField") * (lpeg.V("FieldSep") * lpeg.V("TField"))^0 *
85 lpeg.V("FieldSep")^-1)^-1;
86 Constructor = tllexer.symb("{") * lpeg.V("FieldList") * tllexer.symb("}");
87 NameList = lpeg.V("TypedId") * (tllexer.symb(",") * lpeg.V("TypedId"))^0;
88 ExpList = lpeg.V("Expr") * (tllexer.symb(",") * lpeg.V("Expr"))^0;
89 FuncArgs = tllexer.symb("(") *
90 (lpeg.V("Expr") * (tllexer.symb(",") * lpeg.V("Expr"))^0)^-1 *
91 tllexer.symb(")") +
92 lpeg.V("Constructor") +
93 tllexer.token(tllexer.String);
94 OrOp = tllexer.kw("or");
95 AndOp = tllexer.kw("and");
96 RelOp = tllexer.symb("~=") +
97 tllexer.symb("==") +
98 tllexer.symb("<=") +
99 tllexer.symb(">=") +
100 tllexer.symb("<") +
101 tllexer.symb(">");
102 BOrOp = tllexer.symb("|");
103 BXorOp = tllexer.symb("~");
104 BAndOp = tllexer.symb("&");
105 ShiftOp = tllexer.symb("<<") +
106 tllexer.symb(">>");
107 ConOp = tllexer.symb("..");
108 AddOp = tllexer.symb("+") +
109 tllexer.symb("-");
110 MulOp = tllexer.symb("*") +
111 tllexer.symb("//") +
112 tllexer.symb("/") +
113 tllexer.symb("%");
114 UnOp = tllexer.kw("not") +
115 tllexer.symb("-") +
116 tllexer.symb("~") +
117 tllexer.symb("#");
118 PowOp = tllexer.symb("^");
119 Expr = lpeg.V("SubExpr_1");
120 SubExpr_1 = chainl1(lpeg.V("SubExpr_2"), lpeg.V("OrOp"));
121 SubExpr_2 = chainl1(lpeg.V("SubExpr_3"), lpeg.V("AndOp"));
122 SubExpr_3 = chainl1(lpeg.V("SubExpr_4"), lpeg.V("RelOp"));
123 SubExpr_4 = chainl1(lpeg.V("SubExpr_5"), lpeg.V("BOrOp"));
124 SubExpr_5 = chainl1(lpeg.V("SubExpr_6"), lpeg.V("BXorOp"));
125 SubExpr_6 = chainl1(lpeg.V("SubExpr_7"), lpeg.V("BAndOp"));
126 SubExpr_7 = chainl1(lpeg.V("SubExpr_8"), lpeg.V("ShiftOp"));
127 SubExpr_8 = lpeg.V("SubExpr_9") * lpeg.V("ConOp") * lpeg.V("SubExpr_8") +
128 lpeg.V("SubExpr_9");
129 SubExpr_9 = chainl1(lpeg.V("SubExpr_10"), lpeg.V("AddOp"));
130 SubExpr_10 = chainl1(lpeg.V("SubExpr_11"), lpeg.V("MulOp"));
131 SubExpr_11 = lpeg.V("UnOp") * lpeg.V("SubExpr_11") +
132 lpeg.V("SubExpr_12");
133 SubExpr_12 = lpeg.V("SimpleExp") * (lpeg.V("PowOp") * lpeg.V("SubExpr_11"))^-1;
134 SimpleExp = tllexer.token(tllexer.Number) +
135 tllexer.token(tllexer.String) +
136 tllexer.kw("nil") +
137 tllexer.kw("false") +
138 tllexer.kw("true") +
139 tllexer.symb("...") +
140 lpeg.V("FunctionDef") +
141 lpeg.V("Constructor") +
142 lpeg.V("SuffixedExp");
143 SuffixedExp = lpeg.V("PrimaryExp") * (
144 (tllexer.symb(".") * tllexer.token(tllexer.Name)) / "index" +
145 (tllexer.symb("[") * lpeg.V("Expr") * tllexer.symb("]")) / "index" +
146 (tllexer.symb(":") * tllexer.token(tllexer.Name) * lpeg.V("FuncArgs")) / "call" +
147 lpeg.V("FuncArgs") / "call")^0 / function (...) local l = {...}; return l[#l] end;
148 PrimaryExp = lpeg.V("Var") / "var" +
149 tllexer.symb("(") * lpeg.V("Expr") * tllexer.symb(")");
150 Block = lpeg.V("StatList") * lpeg.V("RetStat")^-1;
151 IfStat = tllexer.kw("if") * lpeg.V("Expr") * tllexer.kw("then") * lpeg.V("Block") *
152 (tllexer.kw("elseif") * lpeg.V("Expr") * tllexer.kw("then") * lpeg.V("Block"))^0 *
153 (tllexer.kw("else") * lpeg.V("Block"))^-1 *
154 tllexer.kw("end");
155 WhileStat = tllexer.kw("while") * lpeg.V("Expr") *
156 tllexer.kw("do") * lpeg.V("Block") * tllexer.kw("end");
157 DoStat = tllexer.kw("do") * lpeg.V("Block") * tllexer.kw("end");
158 ForBody = tllexer.kw("do") * lpeg.V("Block");
159 ForNum = lpeg.V("Id") * tllexer.symb("=") * lpeg.V("Expr") * tllexer.symb(",") *
160 lpeg.V("Expr") * (tllexer.symb(",") * lpeg.V("Expr"))^-1 *
161 lpeg.V("ForBody");
162 ForGen = lpeg.V("NameList") * tllexer.kw("in") *
163 lpeg.V("ExpList") * lpeg.V("ForBody");
164 ForStat = tllexer.kw("for") * (lpeg.V("ForNum") + lpeg.V("ForGen")) * tllexer.kw("end");
165 RepeatStat = tllexer.kw("repeat") * lpeg.V("Block") *
166 tllexer.kw("until") * lpeg.V("Expr");
167 FuncName = lpeg.V("Id") * (tllexer.symb(".") *
168 (tllexer.token(tllexer.Name)))^0 *
169 (tllexer.symb(":") * (tllexer.token(tllexer.Name)))^-1;
170 ParList = lpeg.V("NameList") * (tllexer.symb(",") * lpeg.V("TypedVarArg"))^-1 +
171 lpeg.V("TypedVarArg");
172 TypedVarArg = tllexer.symb("...") * (tllexer.symb(":") * lpeg.V("Type"))^-1;
173 FuncBody = tllexer.symb("(") * lpeg.V("ParList")^-1 * tllexer.symb(")") *
174 (tllexer.symb(":") * lpeg.V("RetType"))^-1 *
175 lpeg.V("Block") * tllexer.kw("end");
176 FuncStat = tllexer.kw("const")^-1 *
177 tllexer.kw("function") * lpeg.V("FuncName") * lpeg.V("FuncBody");
178 LocalFunc = tllexer.kw("function") *
179 lpeg.V("Id") * lpeg.V("FuncBody");
180 LocalAssign = lpeg.V("NameList") *
181 ((tllexer.symb("=") * lpeg.V("ExpList")))^-1;
182 LocalStat = tllexer.kw("local") *
183 (lpeg.V("LocalTypeDec") + lpeg.V("LocalFunc") + lpeg.V("LocalAssign"));
184 LabelStat = tllexer.symb("::") * tllexer.token(tllexer.Name) * tllexer.symb("::");
185 BreakStat = tllexer.kw("break");
186 GoToStat = tllexer.kw("goto") * tllexer.token(tllexer.Name);
187 RetStat = tllexer.kw("return") *
188 (lpeg.V("Expr") * (tllexer.symb(",") * lpeg.V("Expr"))^0)^-1 *
189 tllexer.symb(";")^-1;
190 TypeDecStat = lpeg.V("Interface");
191 LocalTypeDec = lpeg.V("TypeDecStat");
192 LVar = (tllexer.kw("const") * lpeg.V("SuffixedExp")) +
193 lpeg.V("SuffixedExp");
194 ExprStat = lpeg.Cmt(lpeg.V("LVar") * lpeg.V("Assignment"),
195 function (s, i, ...)
196 local l = {...}
197 local i = 1
198 while l[i] ~= "=" do
199 local se = l[i]
200 if se ~= "var" and se ~= "index" then return false end
201 i = i + 1
202 end
203 return true
204 end) +
205 lpeg.Cmt(lpeg.V("SuffixedExp"),
206 function (s, i, se)
207 if se ~= "call" then return false end
208 return true
209 end);
210 Assignment = ((tllexer.symb(",") * lpeg.V("LVar"))^1)^-1 * (tllexer.symb("=") / "=") * lpeg.V("ExpList");
211 Stat = lpeg.V("IfStat") + lpeg.V("WhileStat") + lpeg.V("DoStat") + lpeg.V("ForStat") +
212 lpeg.V("RepeatStat") + lpeg.V("FuncStat") + lpeg.V("LocalStat") +
213 lpeg.V("LabelStat") + lpeg.V("BreakStat") + lpeg.V("GoToStat") +
214 lpeg.V("TypeDecStat") + lpeg.V("ExprStat");
215}
216
217function tlparser.parse (subject, filename, strict, integer)
218 local errorinfo = {}
219 lpeg.setmaxstack(1000)
220 local ast, label, _ = lpeg.match(G, subject, nil, errorinfo, strict, integer)
221 if not ast then
222 return nil
223 else
224 return true
225 end
226end
227
228return tlparser
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-08-14 21:59:26 +0000