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Painless Spec Documentation Clean Up (#29441) Created a flatter structure for the different sections. Cleaned up comments, keywords, and literals. Used callouts for examples where it made sense.
2018-04-17 15:16:08 -04:00
[[painless-lang-spec]]
[DOCS] Setting up separate Painless book.
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== Painless Language Specification
Painless Spec Documentation Clean Up (#29441) Created a flatter structure for the different sections. Cleaned up comments, keywords, and literals. Used callouts for examples where it made sense.
2018-04-17 15:16:08 -04:00
Painless is a scripting language designed for security and performance.
Painless syntax is similar to Java syntax along with some additional
features such as dynamic typing, Map and List accessor shortcuts, and array
initializers. As a direct comparison to Java, there are some important
differences, especially related to the casting model. For more detailed
[DOCS] Setting up separate Painless book.
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conceptual information about the basic constructs that Java and Painless share,
refer to the corresponding topics in the
https://docs.oracle.com/javase/specs/jls/se8/html/index.html[Java Language
Specification].
Painless scripts are parsed and compiled using the http://www.antlr.org/[ANTLR4]
Painless Spec Documentation Clean Up (#29441) Created a flatter structure for the different sections. Cleaned up comments, keywords, and literals. Used callouts for examples where it made sense.
2018-04-17 15:16:08 -04:00
and http://asm.ow2.org/[ASM] libraries. Scripts are compiled directly
into Java Virtual Machine (JVM) byte code and executed against a standard JVM.
This specification uses ANTLR4 grammar notation to describe the allowed syntax.
[DOCS] Setting up separate Painless book.
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However, the actual Painless grammar is more compact than what is shown here.
Painless Spec Documentation Clean Up (#29441) Created a flatter structure for the different sections. Cleaned up comments, keywords, and literals. Used callouts for examples where it made sense.
2018-04-17 15:16:08 -04:00
include::painless-comments.asciidoc[]
[DOCS] Setting up separate Painless book.
2017-05-12 19:17:06 -04:00
Painless Spec Documentation Clean Up (#29441) Created a flatter structure for the different sections. Cleaned up comments, keywords, and literals. Used callouts for examples where it made sense.
2018-04-17 15:16:08 -04:00
include::painless-keywords.asciidoc[]
[DOCS] Setting up separate Painless book.
2017-05-12 19:17:06 -04:00
Painless Spec Documentation Clean Up (#29441) Created a flatter structure for the different sections. Cleaned up comments, keywords, and literals. Used callouts for examples where it made sense.
2018-04-17 15:16:08 -04:00
include::painless-literals.asciidoc[]
[DOCS] Setting up separate Painless book.
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Painless: Docs Clean Up (#29592) As part of the lang spec: separated identifiers into its own section, and cleaned up variables section.
2018-04-25 12:38:41 -04:00
include::painless-identifiers.asciidoc[]
Painless Spec Documentation Clean Up (#29441) Created a flatter structure for the different sections. Cleaned up comments, keywords, and literals. Used callouts for examples where it made sense.
2018-04-17 15:16:08 -04:00
include::painless-variables.asciidoc[]
[DOCS] Setting up separate Painless book.
2017-05-12 19:17:06 -04:00
Painless Spec Documentation Clean Up (#29441) Created a flatter structure for the different sections. Cleaned up comments, keywords, and literals. Used callouts for examples where it made sense.
2018-04-17 15:16:08 -04:00
include::painless-types.asciidoc[]
[DOCS] Setting up separate Painless book.
2017-05-12 19:17:06 -04:00
Painless Spec Documentation Clean Up (#29441) Created a flatter structure for the different sections. Cleaned up comments, keywords, and literals. Used callouts for examples where it made sense.
2018-04-17 15:16:08 -04:00
include::painless-casting.asciidoc[]
[DOCS] Setting up separate Painless book.
2017-05-12 19:17:06 -04:00
include::painless-operators.asciidoc[]
Painless Spec Documentation Clean Up (#29441) Created a flatter structure for the different sections. Cleaned up comments, keywords, and literals. Used callouts for examples where it made sense.
2018-04-17 15:16:08 -04:00
include::painless-general-syntax.asciidoc[]