Code coverage report for sc/lang/compiler/parser/assignment-expr.js

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
1
 
 
1
 
1
1
1
1
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1
571
 
 
1
571
 
1
 
1
571
571
9
9
4
 
5
 
567
 
 
1
567
 
562
520
 
42
 
42
23
 
 
19
 
 
1
23
23
 
23
23
19
 
4
 
 
23
23
23
4
 
 
23
 
 
1
19
1
 
 
18
18
 
18
 
 
 
 
1
4
 
4
 
4
 
4
4
 
4
 
 
 
 
1
4
 
 
 
4
2
2
 
 
4
 
 
1
4
 
4
6
6
2
 
 
 
4
 
 
1
19
 
 
18
 
1
 
 
 
(function(sc) {
  "use strict";
 
  require("./parser");
 
  var Syntax = sc.lang.compiler.Syntax;
  var Message = sc.lang.compiler.Message;
  var Node = sc.lang.compiler.Node;
  var Parser = sc.lang.compiler.Parser;
 
  /*
    AssignmentExpression :
      PartialExpression
      PartialExpression = AssignmentExpression
      # DestructuringAssignmentLeft = AssignmentExpression
 
    DestructuringAssignmentLeft :
      DestructingAssignmentLeftList
      DestructingAssignmentLeftList ... Identifier
 
    DestructingAssignmentLeftList :
      Identifier
      DestructingAssignmentLeftList , Identifier
  */
  Parser.addParseMethod("AssignmentExpression", function() {
    return new AssignmentExpressionParser(this).parse();
  });
 
  function AssignmentExpressionParser(parent) {
    Parser.call(this, parent);
  }
  sc.libs.extend(AssignmentExpressionParser, Parser);
 
  AssignmentExpressionParser.prototype.parse = function() {
    var token;
    if (this.match("#")) {
      token = this.lex();
      if (!this.matchAny([ "[", "{" ])) {
        return this.unlex(token).parseDestructuringAssignmentExpression();
      }
      this.unlex(token);
    }
    return this.parseSimpleAssignmentExpression();
  };
 
  AssignmentExpressionParser.prototype.parseSimpleAssignmentExpression = function() {
    var expr = this.parsePartialExpression();
 
    if (!this.match("=")) {
      return expr;
    }
    this.lex();
 
    if (expr.type === Syntax.CallExpression) {
      return this.parseSimpleAssignmentExpressionViaMethod(expr);
    }
 
    return this.parseSimpleAssignmentExpressionViaOperator(expr);
  };
 
  AssignmentExpressionParser.prototype.parseSimpleAssignmentExpressionViaMethod = function(expr) {
    var marker = this.createMarker(expr);
    var right = this.parseAssignmentExpression();
 
    var methodName = expr.method.name;
    if (expr.stamp === "[") {
      methodName = methodName === "at" ? "put" : "putSeries";
    } else {
      methodName = methodName + "_";
    }
 
    expr.method.name = methodName;
    expr.args.list   = expr.args.list.concat(right);
    if (expr.stamp !== "[")  {
      expr.stamp = "=";
    }
 
    return marker.update().apply(expr, true);
  };
 
  AssignmentExpressionParser.prototype.parseSimpleAssignmentExpressionViaOperator = function(expr) {
    if (isInvalidLeftHandSide(expr)) {
      this.throwError(expr, Message.InvalidLHSInAssignment);
    }
 
    var marker = this.createMarker(expr);
    var right = this.parseAssignmentExpression();
 
    return marker.update().apply(
      Node.createAssignmentExpression("=", expr, right)
    );
  };
 
  AssignmentExpressionParser.prototype.parseDestructuringAssignmentExpression = function() {
    var marker = this.createMarker();
 
    this.expect("#");
 
    var left = this.parseDestructuringAssignmentLeft();
 
    this.expect("=");
    var right = this.parseAssignmentExpression();
 
    return marker.update().apply(
      Node.createAssignmentExpression("=", left.list, right, left.remain)
    );
  };
 
  AssignmentExpressionParser.prototype.parseDestructuringAssignmentLeft = function() {
    var params = {
      list: this.parseDestructingAssignmentLeftList()
    };
 
    if (this.match("...")) {
      this.lex();
      params.remain = this.parseIdentifier({ variable: true });
    }
 
    return params;
  };
 
  AssignmentExpressionParser.prototype.parseDestructingAssignmentLeftList = function() {
    var elemtns = [];
 
    do {
      elemtns.push(this.parseIdentifier({ variable: true }));
      if (this.match(",")) {
        this.lex();
      }
    } while (this.hasNextToken() && !this.matchAny([ "...", "=" ]));
 
    return elemtns;
  };
 
  function isInvalidLeftHandSide(expr) {
    switch (expr.type) {
    case Syntax.Identifier:
    case Syntax.EnvironmentExpression:
      return false;
    }
    return true;
  }
})(sc);