Class: Opal::Nodes::IfNode
Constant Summary
- RUBY_ENGINE_CHECK =
[:call, [:const, :RUBY_ENGINE], :==, [:arglist, [:str, "opal"]]]
- RUBY_PLATFORM_CHECK =
[:call, [:const, :RUBY_PLATFORM], :==, [:arglist, [:str, "opal"]]]
- RUBY_ENGINE_CHECK_NOT =
[:call, [:call, [:const, :RUBY_ENGINE], :==, [:arglist, [:str, "opal"]]], :!', [:arglist]]
- RUBY_PLATFORM_CHECK_NOT =
[:call, [:call, [:const, :RUBY_PLATFORM], :==, [:arglist, [:str, "opal"]]], :!', [:arglist]]
Constants included from Helpers
Helpers::BASIC_IDENTIFIER_RULES, Helpers::ES3_RESERVED_WORD_EXCLUSIVE, Helpers::ES51_RESERVED_WORD, Helpers::IMMUTABLE_PROPS
Instance Attribute Summary
Attributes inherited from Base
Instance Method Summary collapse
- #compile ⇒ Object
- #falsy ⇒ Object
- #needs_wrapper? ⇒ Boolean
-
#skip_check_present? ⇒ Boolean
pre-processing only effects falsy blocks.
- #skip_check_present_not? ⇒ Boolean
- #truthy ⇒ Object
Methods inherited from Base
#add_gvar, #add_ivar, #add_local, #add_temp, children, #children, #compile_to_fragments, #error, #expr, #expr?, #expr_or_nil, #fragment, handle, handlers, #helper, #in_while?, #initialize, #process, #push, #recv, #recv?, #s, #scope, #stmt, #stmt?, #unshift, #while_loop, #with_temp, #wrap
Methods included from Helpers
#current_indent, #empty_line, #indent, #js_falsy, #js_truthy, #js_truthy_optimize, #line, #lvar_to_js, #mid_to_jsid, #property, #valid_name?, #variable
Constructor Details
This class inherits a constructor from Opal::Nodes::Base
Instance Method Details
#compile ⇒ Object
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# File 'opal/lib/opal/nodes/if.rb', line 22 def compile truthy, falsy = self.truthy, self.falsy if skip_check_present? falsy = nil end if skip_check_present_not? truthy = nil end push "if (", js_truthy(test), ") {" # skip if-body if no truthy sexp indent { line stmt(truthy) } if truthy if falsy if falsy.type == :if line "} else ", stmt(falsy) else indent do line "} else {" line stmt(falsy) end line "}" end else push "}" end wrap "(function() {", "; return nil; })()" if needs_wrapper? end |
#falsy ⇒ Object
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# File 'opal/lib/opal/nodes/if.rb', line 72 def falsy needs_wrapper? ? compiler.returns(false_body || s(:nil)) : false_body end |
#needs_wrapper? ⇒ Boolean
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# File 'opal/lib/opal/nodes/if.rb', line 76 def needs_wrapper? expr? or recv? end |
#skip_check_present? ⇒ Boolean
pre-processing only effects falsy blocks. If engine is opal, then falsy block gets generated as normal. Unless engine is opal then that code gets generated as the falsy block
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# File 'opal/lib/opal/nodes/if.rb', line 60 def skip_check_present? test == RUBY_ENGINE_CHECK or test == RUBY_PLATFORM_CHECK end |
#skip_check_present_not? ⇒ Boolean
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# File 'opal/lib/opal/nodes/if.rb', line 64 def skip_check_present_not? test == RUBY_ENGINE_CHECK_NOT or test == RUBY_PLATFORM_CHECK_NOT end |
#truthy ⇒ Object
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# File 'opal/lib/opal/nodes/if.rb', line 68 def truthy needs_wrapper? ? compiler.returns(true_body || s(:nil)) : true_body end |