EVOLUTION-MANAGER

Edit File: lambdas.json

{ "overview": "Lambdas are a special-cased data type for use in interpolations and\nsections.\n\nWhen used as the data value for an Interpolation tag, the lambda MUST be\ntreatable as an arity 0 function, and invoked as such. The returned value\nMUST be rendered against the default delimiters, then interpolated in place\nof the lambda.\n\nWhen used as the data value for a Section tag, the lambda MUST be treatable\nas an arity 1 function, and invoked as such (passing a String containing the\nunprocessed section contents). The returned value MUST be rendered against\nthe current delimiters, then interpolated in place of the section.\n", "tests": [ { "expected": "Hello, world!", "data": { "lambda": { "python": "lambda: \"world\"", "perl": "sub { \"world\" }", "php": "return \"world\";", "ruby": "proc { \"world\" }", "js": "function() { return \"world\" }" "R": "function() { \"world\" }" } }, "name": "Interpolation", "template": "Hello, {{lambda}}!", "desc": "A lambda's return value should be interpolated." }, { "expected": "Hello, world!", "data": { "planet": "world", "lambda": { "python": "lambda: \"{{planet}}\"", "perl": "sub { \"{{planet}}\" }", "php": "return \"{{planet}}\";", "ruby": "proc { \"{{planet}}\" }", "js": "function() { return \"{{planet}}\" }" "R": "function() { \"{{planet}}\" }" } }, "name": "Interpolation - Expansion", "template": "Hello, {{lambda}}!", "desc": "A lambda's return value should be parsed." }, { "expected": "Hello, (|planet| => world)!", "data": { "planet": "world", "lambda": { "python": "lambda: \"|planet| => {{planet}}\"", "perl": "sub { \"|planet| => {{planet}}\" }", "php": "return \"|planet| => {{planet}}\";", "ruby": "proc { \"|planet| => {{planet}}\" }", "js": "function() { return \"|planet| => {{planet}}\" }" "R": "function() { \"|planet| => {{planet}}\" }" } }, "name": "Interpolation - Alternate Delimiters", "template": "{{= | | =}}\nHello, (|&lambda|)!", "desc": "A lambda's return value should parse with the default delimiters." }, { "expected": "1 == 2 == 3", "data": { "lambda": { "python": "lambda: globals().update(calls=globals().get(\"calls\",0)+1) or calls", "perl": "sub { no strict; $calls += 1 }", "php": "global $calls; return ++$calls;", "ruby": "proc { $calls ||= 0; $calls += 1 }", "js": "function() { return (g=(function(){return this})()).calls=(g.calls||0)+1 }" "R": "function(){if (!exists(\"x\")) x <<- 0; x <<- x + 1; x}" } }, "name": "Interpolation - Multiple Calls", "template": "{{lambda}} == {{{lambda}}} == {{lambda}}", "desc": "Interpolated lambdas should not be cached." }, { "expected": "<&gt;>", "data": { "lambda": { "python": "lambda: \">\"", "perl": "sub { \">\" }", "php": "return \">\";", "ruby": "proc { \">\" }", "js": "function() { return \">\" }" "R": "function() { \">\"}" } }, "name": "Escaping", "template": "<{{lambda}}{{{lambda}}}", "desc": "Lambda results should be appropriately escaped." }, { "expected": "<yes>", "data": { "x": "Error!", "lambda": { "python": "lambda text: text == \"{{x}}\" and \"yes\" or \"no\"", "perl": "sub { $_[0] eq \"{{x}}\" ? \"yes\" : \"no\" }", "php": "return ($text == \"{{x}}\") ? \"yes\" : \"no\";", "ruby": "proc { |text| text == \"{{x}}\" ? \"yes\" : \"no\" }", "js": "function(txt) { return (txt == \"{{x}}\" ? \"yes\" : \"no\") }" "R": "function(txt) { ifelse(txt == \"{{x}}\",\"yes\",\"no\") }" } }, "name": "Section", "template": "<{{#lambda}}{{x}}{{/lambda}}>", "desc": "Lambdas used for sections should receive the raw section string." }, { "expected": "<-Earth->", "data": { "planet": "Earth", "lambda": { "python": "lambda text: \"%s{{planet}}%s\" % (text, text)", "perl": "sub { $_[0] . \"{{planet}}\" . $_[0] }", "php": "return $text . \"{{planet}}\" . $text;", "ruby": "proc { |text| \"#{text}{{planet}}#{text}\" }", "js": "function(txt) { return txt + \"{{planet}}\" + txt }" "R": "function(txt) { paste(txt, \"{{planet}}\", txt, sep=\"\"}" } }, "name": "Section - Expansion", "template": "<{{#lambda}}-{{/lambda}}>", "desc": "Lambdas used for sections should have their results parsed." }, { "expected": "<-{{planet}} => Earth->", "data": { "planet": "Earth", "lambda": { "python": "lambda text: \"%s{{planet}} => |planet|%s\" % (text, text)", "perl": "sub { $_[0] . \"{{planet}} => |planet|\" . $_[0] }", "php": "return $text . \"{{planet}} => |planet|\" . $text;", "ruby": "proc { |text| \"#{text}{{planet}} => |planet|#{text}\" }", "js": "function(txt) { return txt + \"{{planet}} => |planet|\" + txt }" } }, "name": "Section - Alternate Delimiters", "template": "{{= | | =}}<|#lambda|-|/lambda|>", "desc": "Lambdas used for sections should parse with the current delimiters." }, { "expected": "__FILE__ != __LINE__", "data": { "lambda": { "python": "lambda text: \"__%s__\" % (text)", "perl": "sub { \"__\" . $_[0] . \"__\" }", "php": "return \"__\" . $text . \"__\";", "ruby": "proc { |text| \"__#{text}__\" }", "js": "function(txt) { return \"__\" + txt + \"__\" }" } }, "name": "Section - Multiple Calls", "template": "{{#lambda}}FILE{{/lambda}} != {{#lambda}}LINE{{/lambda}}", "desc": "Lambdas used for sections should not be cached." }, { "expected": "<>", "data": { "static": "static", "lambda": { "python": "lambda text: 0", "perl": "sub { 0 }", "php": "return false;", "ruby": "proc { |text| false }", "js": "function(txt) { return false }" } }, "name": "Inverted Section", "template": "<{{^lambda}}{{static}}{{/lambda}}>", "desc": "Lambdas used for inverted sections should be considered truthy." } ] }