ilDclTokenizer Class Reference

Class ilDclTokenizer. More...

Collaboration diagram for ilDclTokenizer:

Static Public Member Functions
static	getTokens ($expression)
	Split expression by & (ignore escaped &-symbols with backslash) More...
static	getMathTokens ($math_expression)
	Generate tokens for a math expression. More...

Detailed Description

Class ilDclTokenizer.

Author

Stefan Wanzenried sw@st.nosp@m.uder.nosp@m.-raim.nosp@m.ann..nosp@m.ch

Fabian Schmid fs@st.nosp@m.uder.nosp@m.-raim.nosp@m.ann..nosp@m.ch

Definition at line 9 of file class.ilDclTokenizer.php.

Member Function Documentation

getMathTokens()

static ilDclTokenizer::getMathTokens (   $math_expression )

static

Generate tokens for a math expression.

Parameters

string

$math_expression

Expression of type math

Returns

array

Definition at line 46 of file class.ilDclTokenizer.php.

References ilDclExpressionParser\getOperators().

Referenced by ilDclExpressionParser\parse().

    {
        $operators = array_keys(ilDclExpressionParser::getOperators());
        $pattern = '#((^\[\[)[\d\.]+)|(\(|\)|\\' . implode("|\\", $operators) . ')#';
        $tokens = preg_split($pattern, $math_expression, -1, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY);

        return array_map('trim', $tokens);
    }

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getTokens()

static ilDclTokenizer::getTokens (   $expression )

static

Split expression by & (ignore escaped &-symbols with backslash)

Parameters

string

$expression

Global expression to parse

Returns

array

Definition at line 19 of file class.ilDclTokenizer.php.

References $r, and $results.

Referenced by ilDclExpressionParser\parse().

    {
        $expression = ltrim($expression, '=');
        $expression = trim($expression);
        preg_match_all("/([^\\\\&]|\\\\&)*/ui", $expression, $matches);

        $results = $matches[0];

        $return = array();
        foreach ($results as $r) {
            if (!$r) {
                continue;
            }
            $return[] = str_ireplace('\&', '&', $r);
        }

        return array_map('trim', $return);
    }

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

• Modules/DataCollection/classes/Fields/Formula/class.ilDclTokenizer.php