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44 lines
1.9 KiB
Markdown
44 lines
1.9 KiB
Markdown
---
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layout: docs-index
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title: Enso's Parser
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category: summary
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tags: [parser, readme]
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order: 0
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---
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# Enso's Parser
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The parser is one of the most crucial components of the Enso runtime in that
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_all_ code that a user writes must be parsed. This means that a good parser is
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fast, responsive, and lightweight; it shouldn't baulk at having thousands of
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lines of code thrown at it.
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Enso's parser, however, is very special. In order to support interactive use it
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has to narrow down the scope of a syntax error as much as possible, while still
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providing useful output for the compiler around the rest of the parse errors.
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This feature makes it more complex than many common parsers, so making this work
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while still preserving performance is of paramount importance.
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The various components of the parser's design and architecture are described
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below:
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- [**Tech Analysis:**](./tech-analysis.md) A brief overview of the reasons for
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the implementation technologies for the parser.
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- [**Parser Architecture:**](./architecture.md) An overview of the architecture
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of the parser as a whole.
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- [**Lexer:**](./lexer.md) The Enso lexer, responsible for tokenising the input
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stream of source code.
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- [**Macro Resolution:**](./macro-resolution.md) The system for defining and
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resolving macros on the token stream.
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- [**Operator Resolution:**](./operator-resolution.md) The system for resolving
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operator applications properly.
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- [**Construct Resolution:**](./construct-resolution.md) The system for
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resolving higher-level language constructs in the AST to produce a useful
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output.
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- [**Parser Driver:**](./parser-driver.md)
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- [**AST:**](./ast.md) The parser AST.
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- [**JVM Object Generation:**](./jvm-object-generation.md) The process for
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generating the ast representation on the JVM via reflection.
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- [**Reading Source Code:**](./reader.md) The flexible architecture for reading
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source code into the lexer.
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