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Yui T
2015-10-06 14:09:47 -07:00
parent 788f222059
commit bfaa51b4e9
3 changed files with 53 additions and 42 deletions
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69
src/compiler/parser.ts
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@@ -3015,8 +3015,8 @@ namespace ts {
let newPrecedence = getBinaryOperatorPrecedence();
// Check the precedence to see if we should "take" this operator
// - For left associative operator (all operator but **), only consume the operator
// , recursively call the function below and parse binaryExpression as a rightOperand
// - For left associative operator (all operator but **), consume the operator,
// recursively call the function below, and parse binaryExpression as a rightOperand
// of the caller if the new precendence of the operator is greater then or equal to the current precendence.
// For example:
// a - b - c;
@@ -3025,7 +3025,7 @@ namespace ts {
// ^token; leftOperand = b. Return b to the caller as a rightOperand
// a - b * c;
// ^token; leftOperand = b. Return b * c to the caller as a rightOperand
// - For right associative operator (**), only consume the operator, recursively call the function
// - For right associative operator (**), consume the operator, recursively call the function
// and parse binaryExpression as a rightOperand of the caller if the new precendence of
// the operator is strictly grater than the current precendence
// For example:
@@ -3187,33 +3187,6 @@ namespace ts {
return finishNode(node);
}
/**
* Check if the current token can possibly be in an ES7 increment expression.
*
* Increment Expression:
* LeftHandSideExpression[?Yield]
* LeftHandSideExpression[?Yield][no LineTerminator here]++
* LeftHandSideExpression[?Yield][no LineTerminator here]--
* ++LeftHandSideExpression[?Yield]
* --LeftHandSideExpression[?Yield]
*/
function isIncrementExpression(): boolean{
// TODO(yuisu): Comment why we have to do what are we doing here
switch (token) {
case SyntaxKind.PlusToken:
case SyntaxKind.MinusToken:
case SyntaxKind.TildeToken:
case SyntaxKind.ExclamationToken:
case SyntaxKind.DeleteKeyword:
case SyntaxKind.TypeOfKeyword:
case SyntaxKind.VoidKeyword:
case SyntaxKind.LessThanToken:
return false;
default:
return true;
}
}
/**
* Parse ES7 unary expression and await expression
*
@@ -3241,9 +3214,9 @@ namespace ts {
}
/**
* Parse ES7 simple-unary expression or higher:
* Parse ES7 simple-unary expression or higher:
*
* SimpleUnaryExpression:
* ES7 SimpleUnaryExpression:
* 1) IncrementExpression[?yield]
* 2) delete UnaryExpression[?yield]
* 3) void UnaryExpression[?yield]
@@ -3283,9 +3256,37 @@ namespace ts {
}
/**
* Parse ES7 IncrementExpression. The IncrementExpression is used instead of ES6's PostFixExpression.
* Check if the current token can possibly be an ES7 increment expression.
*
* IncrementExpression[yield]:
* ES7 IncrementExpression:
* LeftHandSideExpression[?Yield]
* LeftHandSideExpression[?Yield][no LineTerminator here]++
* LeftHandSideExpression[?Yield][no LineTerminator here]--
* ++LeftHandSideExpression[?Yield]
* --LeftHandSideExpression[?Yield]
*/
function isIncrementExpression(): boolean{
// This function is called inside parseUnaryExpression to decide
// whether to call parseSimpleUnaryExpression or call parseIncrmentExpression directly
switch (token) {
case SyntaxKind.PlusToken:
case SyntaxKind.MinusToken:
case SyntaxKind.TildeToken:
case SyntaxKind.ExclamationToken:
case SyntaxKind.DeleteKeyword:
case SyntaxKind.TypeOfKeyword:
case SyntaxKind.VoidKeyword:
case SyntaxKind.LessThanToken:
return false;
default:
return true;
}
}
/**
* Parse ES7 IncrementExpression. IncrementExpression is used instead of ES6's PostFixExpression.
*
* ES7 IncrementExpression[yield]:
* 1) LeftHandSideExpression[?yield]
* 2) LeftHandSideExpression[?yield] [[no LineTerminator here]]++
* 3) LeftHandSideExpression[?yield] [[no LineTerminator here]]--