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< > BotCompany Repo | #1008762 // javaTokC_noMLS_onReader - javaTokC as Producer on BufferedReader, no multi-line strings

JavaX fragment (include)

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static Producer<S> javaTokC_noMLS_onReader(final BufferedReader r) {
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  final class X implements Producer<S> {
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    new StringBuilder buf; // stores from "i"
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    char c, d, e = 'x'; // just not '\0'
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    *() {
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      // fill c, d and e
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      nc();
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      nc();
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      nc();
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    }
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    // get next character(s) into c, d and e
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    void nc() ctex {
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      c = d;
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      d = e;
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      if (e == '\0') ret;
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      int i = r.read();
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      e = i < 0 ? '\0'
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        : i == '\0' ? '_' // shouldn't happen anymore
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        : (char) i;
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    }
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    void ncSave() {
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      if (c != '\0') {
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        buf.append(c);
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        nc();
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      }
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    }
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    public S next() {
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      // scan for whitespace
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      while (c != '\0') {
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        if (c == ' ' || c == '\t' || c == '\r' || c == '\n')
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          nc();
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        else if (c == '/' && d == '*') {
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          do nc(); while (c != '\0' && !(c == '*' && d == '/'));
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          nc(); nc();
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        } else if (c == '/' && d == '/') {
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          do nc(); while (c != '\0' && "\r\n".indexOf(c) < 0);
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        } else
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          break;
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      }
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      if (c == '\0') ret null;
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      // scan for non-whitespace
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      if (c == '\'' || c == '"') {
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        char opener = c;
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        ncSave();
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        while (c != '\0') {
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          if (c == opener || c == '\n') { // end at \n to not propagate unclosed string literal errors
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            ncSave();
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            break;
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          } else if (c == '\\') {
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            ncSave();
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            ncSave();
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          } else
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            ncSave();
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        }
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      } else if (Character.isJavaIdentifierStart(c))
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        do ncSave(); while (Character.isJavaIdentifierPart(c) || c == '\''); // for stuff like "don't"
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      else if (Character.isDigit(c)) {
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        do ncSave(); while (Character.isDigit(c));
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        if (c == 'L') ncSave(); // Long constants like 1L
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      } else
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        ncSave();
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      S t = buf.toString();
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      buf.setLength(0);
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      ret t;
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    }
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  }
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  ret new X;
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}

Author comment

Began life as a copy of #1005981

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Snippet ID: #1008762
Snippet name: javaTokC_noMLS_onReader - javaTokC as Producer on BufferedReader, no multi-line strings
Eternal ID of this version: #1008762/3
Text MD5: 0de3d66eb9b48d4672cb1ef671229e3c
Author: stefan
Category: javax / parsing
Type: JavaX fragment (include)
Public (visible to everyone): Yes
Archived (hidden from active list): No
Created/modified: 2018-06-02 23:57:02
Source code size: 2023 bytes / 76 lines
Pitched / IR pitched: No / No
Views / Downloads: 503 / 563
Version history: 2 change(s)
Referenced in: [show references]