new ExprParser(tokenStream, symbols)
Parser for (constant) expressions
Parameters:
| Name | Type | Description |
|---|---|---|
tokenStream |
Parser.TokenStream | The stream of tokens to parse |
symbols |
array | An array of pre-defined symbols |
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Methods
parseBinaryExpression() → {number}
Parse a binary expression
A binary expression is either an unary expression or a binary expression followed by a binary operator and another binary expression.
Precedence of operations is taken into account.
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Returns:
The value of the expression
- Type
- number
parseBinaryOperator() → {Object|undefined}
Parse an optional binary operator
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Returns:
The description of the binary operator,
or undefined if no operator is present.
- Type
- Object | undefined
parseExpression() → {number}
Parse an expression
An expression is a binary expression.
This function is here to allow extension by other expression types.
Use this function instead of the more specific functions if you want to
parse general expressions.
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Returns:
The value of the expression
- Type
- number
parsePostfixExpression() → {number}
Parse a postfix expression
A postfix expression is a builtin function call or a primary expression.
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Returns:
The value of the expression
- Type
- number
parsePrimaryExpression() → {number}
Parse a primary expression
A primary expression is a number literal or a parenthesized expression.
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Returns:
The value of the expression
- Type
- number
parseUnaryExpression() → {number}
Parse an unary expression
An unary expression is either a unary operator followed by an unary expression or a postfix expression.
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Returns:
The value of the expression
- Type
- number
parseUnaryOperator() → {function|undefined}
Parse an optional unary operator
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Returns:
The function used to evaluate the operator,
or undefined if no operator is present.
- Type
- function | undefined