Read a configuration file: Difference between revisions
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=={{header|D}}== |
=={{header|D}}== |
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{{Incorrect|D|Optional '=' between parameter name and value is not handled.}} |
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<syntaxhighlight lang="d">import std.stdio, std.string, std.conv, std.regex, std.getopt; |
<syntaxhighlight lang="d">import std.stdio, std.string, std.conv, std.regex, std.getopt; |
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enum VarName(alias var) = var.stringof |
enum VarName(alias var) = var.stringof; |
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void setOpt(alias Var)(in string line) { |
void setOpt(alias Var)(in string line) { |
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auto m = match(line, regex(`^` ~ VarName!Var ~ `(\s+(.*))?`)); |
auto m = match(line, regex(`^(?i)` ~ VarName!Var ~ `(?-i)(\s*=?\s+(.*))?`)); |
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if (!m.empty) { |
if (!m.empty) { |
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static if (is(typeof(Var) == string[])) |
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Var = m.captures.length > 2 ? m.captures[2].split(regex(`\s*,\s*`)) : [""]; |
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static if (is(typeof(Var) == string)) |
static if (is(typeof(Var) == string)) |
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Var = m.captures.length > 2 ? m.captures[2] : ""; |
Var = m.captures.length > 2 ? m.captures[2] : ""; |
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void main(in string[] args) { |
void main(in string[] args) { |
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string fullName, favouriteFruit |
string fullName, favouriteFruit; |
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string[] otherFamily; |
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bool needsPeeling, seedsRemoved; // Default false. |
bool needsPeeling, seedsRemoved; // Default false. |
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auto f = "readcfg. |
auto f = "readcfg.conf".File; |
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foreach (line; f.byLine) { |
foreach (line; f.byLine) { |
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auto opt = line.strip.idup; |
auto opt = line.strip.idup; |
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setOpt!fullName(opt); |
setOpt!fullName(opt); |
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setOpt!favouriteFruit(opt); |
setOpt!favouriteFruit(opt); |
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} |
} |
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writefln("% |
writefln("%s = %s", VarName!fullName, fullName); |
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writefln("% |
writefln("%s = %s", VarName!favouriteFruit, favouriteFruit); |
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writefln("% |
writefln("%s = %s", VarName!needsPeeling, needsPeeling); |
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writefln("% |
writefln("%s = %s", VarName!seedsRemoved, seedsRemoved); |
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writefln("% |
writefln("%s = %s", VarName!otherFamily, otherFamily); |
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}</syntaxhighlight> |
}</syntaxhighlight> |
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{{out}} |
{{out}} |
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<pre> |
<pre>fullName = Foo Barber |
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favouriteFruit = banana |
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needsPeeling = true |
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seedsRemoved = false |
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otherFamily = ["Rhu Barber", "Harry Barber", "John"]</pre> |
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=== Variant 2 === |
=== Variant 2 === |
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