gd::ExpressionParser2 Class Reference

Parse an expression, returning a tree of node corresponding to the parsed expression. More...

#include <ExpressionParser2.h>

Public Member Functions
std::unique_ptr< ExpressionNode >	ParseExpression (const gd::String &expression_)

Static Public Member Functions
static size_t	WrittenParametersFirstIndex (const gd::String &objectName, const gd::String &behaviorName)

Detailed Description

Parse an expression, returning a tree of node corresponding to the parsed expression.

This is a LL(1) parser. This could be extracted to a generic/reusable parser by refactoring out the dependency on gd::MetadataProvider (injecting instead functions to be called to query supported functions).

See also

gd::ExpressionParserError

gd::ExpressionNode

Member Function Documentation

ParseExpression()

std::unique_ptr<ExpressionNode> gd::ExpressionParser2::ParseExpression ( const gd::String &  expression_ )

inline

Parse the given expression into a tree of nodes.

Parameters

expression

The expression to parse.

Returns

The node representing the expression as a parsed tree.

WrittenParametersFirstIndex()

static size_t gd::ExpressionParser2::WrittenParametersFirstIndex ( const gd::String &  objectName, const gd::String &  behaviorName  )

inlinestatic

Given an object name (or empty if none) and a behavior name (or empty if none), return the index of the first parameter that is inside the parenthesis: 0, 1 or 2.

For example, in an expression like Object.MyBehavior::Method("hello"), the parameter "hello" is the second parameter (the first being by convention Object, and the second MyBehavior, also by convention).

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The documentation for this class was generated from the following files:

• ExpressionParser2.h
• ExpressionParser2.cpp