Add a parseExpression public method (#213)

babel · Jan 27, 2017 · 898c4a7 · 898c4a7
1 parent b6b4610
commit 898c4a7
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Showing 249 changed files with 7,484 additions and 2 deletions.
diff --git a/src/index.js b/src/index.js
@@ -20,4 +20,13 @@ export function parse(input, options) {
   return new Parser(options, input).parse();
 }
 
+export function parseExpression(input, options) {
+  const parser = new Parser(options, input);
+  if (parser.options.strictMode) {
+    parser.state.strict = true;
+  }
+  return parser.getExpression();
+}
+
+
 export { tokTypes };
diff --git a/src/parser/expression.js b/src/parser/expression.js
@@ -42,6 +42,16 @@ pp.checkPropClash = function (prop, propHash) {
   }
 };
 
+// Convenience method to parse an Expression only
+pp.getExpression = function() {
+  this.nextToken();
+  const expr = this.parseExpression();
+  if (!this.match(tt.eof)) {
+    this.unexpected();
+  }
+  return expr;
+};
+
 // ### Expression parsing
 
 // These nest, from the most general expression type at the top to

diff --git a/test/expressions/esprima/LICENSE b/test/expressions/esprima/LICENSE
@@ -0,0 +1,21 @@
+Copyright (c) jQuery Foundation, Inc. and Contributors, All Rights Reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+  * Redistributions of source code must retain the above copyright
+    notice, this list of conditions and the following disclaimer.
+  * Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in the
+    documentation and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
+DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/test/expressions/esprima/expression-additive/migrated_0000/actual.js b/test/expressions/esprima/expression-additive/migrated_0000/actual.js
@@ -0,0 +1 @@
+x + y
diff --git a/test/expressions/esprima/expression-additive/migrated_0000/expected.json b/test/expressions/esprima/expression-additive/migrated_0000/expected.json
@@ -0,0 +1,50 @@
+{
+  "type": "BinaryExpression",
+  "start": 0,
+  "end": 5,
+  "loc": {
+    "start": {
+      "line": 1,
+      "column": 0
+    },
+    "end": {
+      "line": 1,
+      "column": 5
+    }
+  },
+  "left": {
+    "type": "Identifier",
+    "start": 0,
+    "end": 1,
+    "loc": {
+      "start": {
+        "line": 1,
+        "column": 0
+      },
+      "end": {
+        "line": 1,
+        "column": 1
+      },
+      "identifierName": "x"
+    },
+    "name": "x"
+  },
+  "operator": "+",
+  "right": {
+    "type": "Identifier",
+    "start": 4,
+    "end": 5,
+    "loc": {
+      "start": {
+        "line": 1,
+        "column": 4
+      },
+      "end": {
+        "line": 1,
+        "column": 5
+      },
+      "identifierName": "y"
+    },
+    "name": "y"
+  }
+}
diff --git a/test/expressions/esprima/expression-additive/migrated_0001/actual.js b/test/expressions/esprima/expression-additive/migrated_0001/actual.js
@@ -0,0 +1 @@
+x - y
diff --git a/test/expressions/esprima/expression-additive/migrated_0001/expected.json b/test/expressions/esprima/expression-additive/migrated_0001/expected.json
@@ -0,0 +1,50 @@
+{
+  "type": "BinaryExpression",
+  "start": 0,
+  "end": 5,
+  "loc": {
+    "start": {
+      "line": 1,
+      "column": 0
+    },
+    "end": {
+      "line": 1,
+      "column": 5
+    }
+  },
+  "left": {
+    "type": "Identifier",
+    "start": 0,
+    "end": 1,
+    "loc": {
+      "start": {
+        "line": 1,
+        "column": 0
+      },
+      "end": {
+        "line": 1,
+        "column": 1
+      },
+      "identifierName": "x"
+    },
+    "name": "x"
+  },
+  "operator": "-",
+  "right": {
+    "type": "Identifier",
+    "start": 4,
+    "end": 5,
+    "loc": {
+      "start": {
+        "line": 1,
+        "column": 4
+      },
+      "end": {
+        "line": 1,
+        "column": 5
+      },
+      "identifierName": "y"
+    },
+    "name": "y"
+  }
+}
diff --git a/test/expressions/esprima/expression-additive/migrated_0002/actual.js b/test/expressions/esprima/expression-additive/migrated_0002/actual.js
@@ -0,0 +1 @@
+"use strict" + 42
diff --git a/test/expressions/esprima/expression-additive/migrated_0002/expected.json b/test/expressions/esprima/expression-additive/migrated_0002/expected.json
@@ -0,0 +1,56 @@
+{
+  "type": "BinaryExpression",
+  "start": 0,
+  "end": 17,
+  "loc": {
+    "start": {
+      "line": 1,
+      "column": 0
+    },
+    "end": {
+      "line": 1,
+      "column": 17
+    }
+  },
+  "left": {
+    "type": "StringLiteral",
+    "start": 0,
+    "end": 12,
+    "loc": {
+      "start": {
+        "line": 1,
+        "column": 0
+      },
+      "end": {
+        "line": 1,
+        "column": 12
+      }
+    },
+    "extra": {
+      "rawValue": "use strict",
+      "raw": "\"use strict\""
+    },
+    "value": "use strict"
+  },
+  "operator": "+",
+  "right": {
+    "type": "NumericLiteral",
+    "start": 15,
+    "end": 17,
+    "loc": {
+      "start": {
+        "line": 1,
+        "column": 15
+      },
+      "end": {
+        "line": 1,
+        "column": 17
+      }
+    },
+    "extra": {
+      "rawValue": 42,
+      "raw": "42"
+    },
+    "value": 42
+  }
+}
diff --git a/test/expressions/esprima/expression-assignment/migrated_0000/actual.js b/test/expressions/esprima/expression-assignment/migrated_0000/actual.js
@@ -0,0 +1 @@
+x = 42
diff --git a/test/expressions/esprima/expression-assignment/migrated_0000/expected.json b/test/expressions/esprima/expression-assignment/migrated_0000/expected.json
@@ -0,0 +1,53 @@
+{
+  "type": "AssignmentExpression",
+  "start": 0,
+  "end": 6,
+  "loc": {
+    "start": {
+      "line": 1,
+      "column": 0
+    },
+    "end": {
+      "line": 1,
+      "column": 6
+    }
+  },
+  "operator": "=",
+  "left": {
+    "type": "Identifier",
+    "start": 0,
+    "end": 1,
+    "loc": {
+      "start": {
+        "line": 1,
+        "column": 0
+      },
+      "end": {
+        "line": 1,
+        "column": 1
+      },
+      "identifierName": "x"
+    },
+    "name": "x"
+  },
+  "right": {
+    "type": "NumericLiteral",
+    "start": 4,
+    "end": 6,
+    "loc": {
+      "start": {
+        "line": 1,
+        "column": 4
+      },
+      "end": {
+        "line": 1,
+        "column": 6
+      }
+    },
+    "extra": {
+      "rawValue": 42,
+      "raw": "42"
+    },
+    "value": 42
+  }
+}
diff --git a/test/expressions/esprima/expression-assignment/migrated_0001/actual.js b/test/expressions/esprima/expression-assignment/migrated_0001/actual.js
@@ -0,0 +1 @@
+eval = 42
diff --git a/test/expressions/esprima/expression-assignment/migrated_0001/expected.json b/test/expressions/esprima/expression-assignment/migrated_0001/expected.json
@@ -0,0 +1,53 @@
+{
+  "type": "AssignmentExpression",
+  "start": 0,
+  "end": 9,
+  "loc": {
+    "start": {
+      "line": 1,
+      "column": 0
+    },
+    "end": {
+      "line": 1,
+      "column": 9
+    }
+  },
+  "operator": "=",
+  "left": {
+    "type": "Identifier",
+    "start": 0,
+    "end": 4,
+    "loc": {
+      "start": {
+        "line": 1,
+        "column": 0
+      },
+      "end": {
+        "line": 1,
+        "column": 4
+      },
+      "identifierName": "eval"
+    },
+    "name": "eval"
+  },
+  "right": {
+    "type": "NumericLiteral",
+    "start": 7,
+    "end": 9,
+    "loc": {
+      "start": {
+        "line": 1,
+        "column": 7
+      },
+      "end": {
+        "line": 1,
+        "column": 9
+      }
+    },
+    "extra": {
+      "rawValue": 42,
+      "raw": "42"
+    },
+    "value": 42
+  }
+}
diff --git a/test/expressions/esprima/expression-assignment/migrated_0002/actual.js b/test/expressions/esprima/expression-assignment/migrated_0002/actual.js
@@ -0,0 +1 @@
+arguments = 42
diff --git a/test/expressions/esprima/expression-assignment/migrated_0002/expected.json b/test/expressions/esprima/expression-assignment/migrated_0002/expected.json
@@ -0,0 +1,53 @@
+{
+  "type": "AssignmentExpression",
+  "start": 0,
+  "end": 14,
+  "loc": {
+    "start": {
+      "line": 1,
+      "column": 0
+    },
+    "end": {
+      "line": 1,
+      "column": 14
+    }
+  },
+  "operator": "=",
+  "left": {
+    "type": "Identifier",
+    "start": 0,
+    "end": 9,
+    "loc": {
+      "start": {
+        "line": 1,
+        "column": 0
+      },
+      "end": {
+        "line": 1,
+        "column": 9
+      },
+      "identifierName": "arguments"
+    },
+    "name": "arguments"
+  },
+  "right": {
+    "type": "NumericLiteral",
+    "start": 12,
+    "end": 14,
+    "loc": {
+      "start": {
+        "line": 1,
+        "column": 12
+      },
+      "end": {
+        "line": 1,
+        "column": 14
+      }
+    },
+    "extra": {
+      "rawValue": 42,
+      "raw": "42"
+    },
+    "value": 42
+  }
+}
diff --git a/test/expressions/esprima/expression-assignment/migrated_0003/actual.js b/test/expressions/esprima/expression-assignment/migrated_0003/actual.js
@@ -0,0 +1 @@
+x *= 42