1 | static CtxExpr ctxParseExpression(S exp) {
|
2 | Explain e = explain(exp, ctxParsingRules(), "exp"); |
3 | if (e == null) fail("Couldn't parse expression: " + exp);
|
4 | ret ctxParseExpression(e); |
5 | } |
6 | |
7 | static CtxExpr ctxParseExpression(Explain exp) {
|
8 | try {
|
9 | if (exp.is("bracket")) {
|
10 | CtxExpr e = ctxParseExpression(exp.sub(0)); |
11 | if (e instanceof CtxConst) |
12 | ret new CtxRegexp(e/CtxConst.value); |
13 | ret e; |
14 | } |
15 | if (exp.is("fcall")) {
|
16 | CtxFCall call = new(exp.str(0)); |
17 | for (int i = 1; i < l(exp.subs); i++) |
18 | call.add(ctxParseSub(exp, i)); |
19 | ret call; |
20 | } |
21 | if (exp.is("and"))
|
22 | ret new CtxAnd(ctxParseSub(exp, 0), |
23 | ctxParseSub(exp, 1)); |
24 | if (exp.is("or"))
|
25 | ret new CtxOr(ctxParseSub(exp, 0), |
26 | ctxParseSub(exp, 1)); |
27 | if (exp.is("neg"))
|
28 | ret new CtxNeg(ctxParseSub(exp, 0)); |
29 | if (exp.is("int"))
|
30 | ret new CtxConst(exp.tok().get(1)); |
31 | if (exp.is("quoted"))
|
32 | ret new CtxConst(unquoteCtx(exp.tok().get(1))); |
33 | //ret new CtxRegexp(unquoteCtx(exp.tok().get(1))); |
34 | //if (exp.is("id"))
|
35 | if (l(exp.tok()) == 3 && isIdentifier(exp.tok().get(1))) |
36 | ret new CtxVar(exp.tok().get(1)); |
37 | if (exp.is("comp"))
|
38 | ret new CtxComp(ctxParseSub(exp, 0), ctxParseSub(exp, 1)); |
39 | if (exp.is("uneq"))
|
40 | ret new CtxUneq(ctxParseSub(exp, 0), ctxParseSub(exp, 1)); |
41 | if (exp.is("match"))
|
42 | ret new CtxMatch(ctxParseSub(exp, 0), unquoteCtx(exp.str(1))); |
43 | if (exp.singleEqualChild()) |
44 | ret ctxParseExpression(exp.sub(0)); |
45 | } catch e {
|
46 | printExplainTree(exp); |
47 | throw rethrow(e); |
48 | } |
49 | throw todo(exp.className() + " - " + quote(exp.string())); |
50 | } |
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| Snippet ID: | #1008908 |
| Snippet name: | ctxParseExpression |
| Eternal ID of this version: | #1008908/23 |
| Text MD5: | 9337bd72c6d14e1f319eaed068815366 |
| Author: | stefan |
| Category: | javax / a.i. |
| Type: | JavaX fragment (include) |
| Public (visible to everyone): | Yes |
| Archived (hidden from active list): | No |
| Created/modified: | 2019-07-21 01:14:22 |
| Source code size: | 1698 bytes / 50 lines |
| Pitched / IR pitched: | No / No |
| Views / Downloads: | 601 / 646 |
| Version history: | 22 change(s) |
| Referenced in: | [show references] |