feat: Initial implementation, focused on parsing type definitions

.github/.release-please-manifest.json

@@ -0,0 +1 @@
+{}

.github/dependabot.yaml

@@ -0,0 +1,17 @@
+# yaml-language-server: $schema=https://raw.githubusercontent.com/SchemaStore/schemastore/master/src/schemas/json/dependabot-2.0.json
+version: 2
+updates:
+  - directory: /
+    package-ecosystem: gomod
+    schedule:
+      interval: monthly
+    commit-message:
+      prefix: chore
+      include: scope
+  - directory: /
+    package-ecosystem: github-actions
+    schedule:
+      interval: monthly
+    commit-message:
+      prefix: chore
+      include: scope

.github/release-please-config.json

@@ -0,0 +1,10 @@
+{
+  "$schema": "https://raw.githubusercontent.com/googleapis/release-please/main/schemas/config.json",
+  "packages": {
+    ".": {
+      "release-type": "go",
+      "bump-minor-pre-major": true,
+      "include-v-in-tag": true
+    }
+  }
+}

.github/workflows/ci.yaml

@@ -0,0 +1,42 @@
+# yaml-language-server: $schema=https://json.schemastore.org/github-workflow
+
+on:
+  push:
+    branches:
+      - main
+  pull_request: {}
+  workflow_dispatch: {}
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        go-version: ["1.20", "1.21", "1.22"]
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-go@v5
+        with:
+          go-version: ${{ matrix.go-version }}
+      - run: go test -cover ./...
+
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-go@v5
+      - uses: golangci/golangci-lint-action@v6
+        with:
+          version: v1.59.1
+
+  release-please:
+    runs-on: ubuntu-latest
+    needs: [test, lint]
+    if: github.ref == 'refs/heads/main'
+    steps:
+      - uses: googleapis/release-please-action@v4
+        id: release-please
+        with:
+          token: ${{ secrets.PAT }}
+          config-file: .github/release-please-config.json
+          manifest-file: .github/.release-please-manifest.json

.golangci.yaml

@@ -0,0 +1,120 @@
+# See https://golangci-lint.run/usage/configuration/
+
+linters:
+  disable-all: true
+  enable:
+    # See https://golangci-lint.run/usage/linters/
+    - asasalint # Check for pass []any as any in variadic func(...any).
+    - bodyclose # Checks whether HTTP response body is closed successfully.
+    - contextcheck # Check whether the function uses a non-inherited context.
+    - durationcheck # Check for two durations multiplied together.
+    - errcheck # Checks whether Rows.Err of rows is checked successfully.
+    - errchkjson # Checks types passed to the json encoding functions. Reports unsupported types and reports occations, where the check for the returned error can be omitted.
+    - errorlint # Errorlint is a linter for that can be used to find code that will cause problems with the error wrapping scheme introduced in Go 1.13.
+    - forbidigo # Forbids identifiers.
+    - gci # Gci controls Go package import order and makes it always deterministic.
+    - gocritic # Provides diagnostics that check for bugs, performance and style issues. Extensible without recompilation through dynamic rules. Dynamic rules are written declaratively with AST patterns, filters, report message and optional suggestion.
+    - godot # Check if comments end in a period.
+    - gosec # Inspects source code for security problems.
+    - gosimple # Linter for Go source code that specializes in simplifying code.
+    - govet # Vet examines Go source code and reports suspicious constructs, such as Printf calls whose arguments do not align with the format string.
+    - inamedparam # Reports interfaces with unnamed method parameters.
+    - ineffassign # Detects when assignments to existing variables are not used.
+    - mirror # Reports wrong mirror patterns of bytes/strings usage.
+    - misspell # Finds commonly misspelled English words.
+    - musttag # Enforce field tags in (un)marshaled structs.
+    - nilerr # Finds the code that returns nil even if it checks that the error is not nil.
+    - nilnil # Checks that there is no simultaneous return of nil error and an invalid value.
+    - noctx # Finds sending http request without context.Context.
+    - nolintlint # Reports ill-formed or insufficient nolint directives.
+    - nosprintfhostport # Checks for misuse of Sprintf to construct a host with port in a URL.
+    - perfsprint # Checks that fmt.Sprintf can be replaced with a faster alternative.
+    - protogetter # Reports direct reads from proto message fields when getters should be used.
+    - reassign # Checks that package variables are not reassigned.
+    - revive # Fast, configurable, extensible, flexible, and beautiful linter for Go. Drop-in replacement of golint.
+    - staticcheck # It's a set of rules from staticcheck. It's not the same thing as the staticcheck binary. The author of staticcheck doesn't support or approve the use of staticcheck as a library inside golangci-lint.
+    - tenv # # Tenv is analyzer that detects using os.Setenv instead of t.Setenv since Go1.17.
+    - unconvert # Remove unnecessary type conversions.
+    - unused # Checks Go code for unused constants, variables, functions and types.
+
+linters-settings:
+  # See https://golangci-lint.run/usage/linters/#linters-configuration
+  forbidigo:
+    forbid:
+      - 'fmt\.Print.*' # Should be using a logger
+  gci:
+    sections:
+      - standard
+      - default
+      - prefix(github.com/armsnyder)
+  gocritic:
+    enabled-tags:
+      - performance
+      - opinionated
+      - experimental
+    disabled-checks:
+      - whyNoLint # False positives, use nolintlint instead
+  govet:
+    enable-all: true
+    disable:
+      - fieldalignment # Too struct
+  nolintlint:
+    require-specific: true
+  revive:
+    enable-all-rules: true
+    rules:
+      # See https://revive.run/r
+      - name: add-constant # too strict
+        disabled: true
+      - name: argument-limit # too strict
+        disabled: true
+      - name: cognitive-complexity
+        arguments:
+          - 30
+      - name: cyclomatic
+        arguments:
+          - 30
+      - name: file-header # too strict
+        disabled: true
+      - name: function-length
+        arguments:
+          - 50 # statements
+          - 0 # lines (0 to disable)
+      - name: function-result-limit # too strict
+        disabled: true
+      - name: import-shadowing # too strict, results in uglier code
+        disabled: true
+      - name: line-length-limit # too strict
+        disabled: true
+      - name: max-public-structs # too strict
+        disabled: true
+      - name: modifies-parameter # too strict
+        disabled: true
+      - name: modifies-value-receiver # too strict
+        disabled: true
+      - name: nested-structs # too strict
+        disabled: true
+      - name: package-comments # too strict
+        disabled: true
+      - name: unhandled-error
+        disabled: true # not as good as errcheck
+
+issues:
+  exclude-rules:
+    - path: _test\.go$
+      linters:
+        - gosec # too strict
+        - noctx # too strict
+    - path: _test\.go$
+      text: (cognitive-complexity|function-length|dot-imports|import-alias-naming) # too strict
+      linters:
+        - revive
+    # Shadowing err is common.
+    - text: 'shadow: declaration of "err"'
+      linters:
+        - govet
+    - text: "^exported:.+stutters" # too strict and gets in the way of combining types like handlers
+      linters:
+        - revive
+    - path: _test\.go$
+      text: "unused-parameter" # too strict

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2024 Adam Snyder
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

@@ -0,0 +1,19 @@
+# TypeScript AST
+
+This library provides a way to parse TypeScript source code into an abstract
+syntax tree (AST) in Golang. The packages are laid out similar to the standard
+[go](https://pkg.go.dev/go) library.
+
+[Package Documentation](https://pkg.go.dev/github.com/armsnyder/typescript-ast-go)
+
+The main two packages are:
+
+- [parser](https://pkg.go.dev/github.com/armsnyder/typescript-ast-go/parser):
+  Parse TypeScript source code into an AST.
+- [ast](https://pkg.go.dev/github.com/armsnyder/typescript-ast-go/ast): The
+  AST nodes and visitor for TypeScript source code.
+
+This library was originally created in order to parse TypeScript type
+definitions specifically for the Language Server Protocol Specification. As a
+result, it is not feature complete and may not work for all TypeScript source
+code.

ast/ast.go

@@ -0,0 +1,8 @@
+// Package ast defines the abstract syntax tree (AST) for the TypeScript
+// programming language and provides functionality for traversing the AST.
+package ast
+
+// Node is a common interface that all nodes in the AST implement.
+type Node interface {
+	node()
+}

ast/expression.go

@@ -0,0 +1,138 @@
+package ast
+
+import "github.com/armsnyder/typescript-ast-go/token"
+
+// Expr is a [Node] that represents an expression. An expression produces a
+// value.
+type Expr interface {
+	Node
+	expr()
+}
+
+// NumericLiteral is a numeric literal expression.
+type NumericLiteral struct {
+	Text string
+}
+
+func (n *NumericLiteral) String() string {
+	return n.Text
+}
+
+func (*NumericLiteral) node() {}
+func (*NumericLiteral) expr() {}
+
+// StringLiteral is a string literal expression.
+type StringLiteral struct {
+	Text string
+}
+
+func (n *StringLiteral) String() string {
+	return n.Text
+}
+
+func (*StringLiteral) node() {}
+func (*StringLiteral) expr() {}
+
+// ArrayLiteralExpression is an array literal expression.
+type ArrayLiteralExpression struct {
+	Elements []Expr
+}
+
+func (*ArrayLiteralExpression) node() {}
+func (*ArrayLiteralExpression) expr() {}
+
+// Identifier is an identifier literal expression.
+type Identifier struct {
+	Text string
+}
+
+func (n *Identifier) String() string {
+	return n.Text
+}
+
+func (*Identifier) node() {}
+func (*Identifier) expr() {}
+
+// QualifiedName is a qualified name expression.
+type QualifiedName struct {
+	Left  *Identifier
+	Right *Identifier
+}
+
+func (*QualifiedName) node() {}
+func (*QualifiedName) expr() {}
+
+// EnumMember is an enum member expression.
+type EnumMember struct {
+	Name           *Identifier
+	Initializer    Expr
+	LeadingComment string
+}
+
+func (n *EnumMember) String() string {
+	return n.LeadingComment
+}
+
+func (*EnumMember) node() {}
+func (*EnumMember) expr() {}
+
+// TypeParameter is a type parameter expression.
+type TypeParameter struct {
+	Name *Identifier
+}
+
+func (*TypeParameter) node() {}
+func (*TypeParameter) expr() {}
+
+// HeritageClause is a heritage clause expression.
+type HeritageClause struct {
+	Types []*ExpressionWithTypeArguments
+}
+
+func (*HeritageClause) node() {}
+func (*HeritageClause) expr() {}
+
+// ExpressionWithTypeArguments is an expression with type arguments.
+type ExpressionWithTypeArguments struct {
+	Expression *Identifier
+}
+
+func (*ExpressionWithTypeArguments) node() {}
+func (*ExpressionWithTypeArguments) expr() {}
+
+// Parameter is a parameter expression.
+type Parameter struct {
+	Name *Identifier
+	Type Type
+}
+
+func (*Parameter) node() {}
+func (*Parameter) expr() {}
+
+// VariableDeclarationList is an expression that declares a list of variables.
+type VariableDeclarationList struct {
+	Declarations []*VariableDeclaration
+}
+
+func (*VariableDeclarationList) node() {}
+func (*VariableDeclarationList) expr() {}
+
+// VariableDeclaration is an expression that declares a variable.
+type VariableDeclaration struct {
+	Name        *Identifier
+	Type        Type
+	Initializer Expr
+}
+
+func (*VariableDeclaration) node() {}
+func (*VariableDeclaration) expr() {}
+
+// PrefixUnaryExpression is an expression that applies a unary operator to an
+// operand.
+type PrefixUnaryExpression struct {
+	Operator token.Kind
+	Operand  Expr
+}
+
+func (*PrefixUnaryExpression) node() {}
+func (*PrefixUnaryExpression) expr() {}