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|
The `regexp()` function compiles the given pattern string into a regular
expression, optionally applying the flags specified in the second argument.
Throws an exception if unrecognized flag characters are specified or if the
flags argument is not a string value.
Throws an exception if the given pattern string cannot be compiled into a
regular expression.
Returns the compiled regexp object.
-- Testcase --
{%
let re1 = regexp("begin (.+) end", "i");
let re2 = regexp("[a-z]+", "g");
let re3 = regexp("Dots (.+) newlines", "s");
printf("%.J\n", [
match("BEGIN this is some text END", re1),
match("This is a group of words", re2),
match("Dots now\ndon't\nmatch\ntext\nwith newlines", re3)
]);
%}
-- End --
-- Expect stdout --
[
[
"BEGIN this is some text END",
"this is some text"
],
[
[
"his"
],
[
"is"
],
[
"a"
],
[
"group"
],
[
"of"
],
[
"words"
]
],
null
]
-- End --
Passing an uncompilable regexp throws an exception.
-- Testcase --
{%
try {
// unterminated capture group to trigger syntax error
regexp("foo(");
}
catch (e) {
// Massage compile error message for stable output since it is
// dependant on the underyling C library.
e.message = "Compile error";
die(e);
}
%}
-- End --
-- Expect stderr --
Compile error
In line 10, byte 8:
` die(e);`
Near here ---^
-- End --
Passing an invalid flags argument throws an exception.
-- Testcase --
{%
regexp(".*", true);
%}
-- End --
-- Expect stderr --
Type error: Given flags argument is not a string
In line 2, byte 19:
` regexp(".*", true);`
Near here -----------^
-- End --
-- Testcase --
{%
regexp(".*", "igz");
%}
-- End --
-- Expect stderr --
Type error: Unrecognized flag character 'z'
In line 2, byte 20:
` regexp(".*", "igz");`
Near here ------------^
-- End --
|
