vscode-rrebnf
This VSCode extension provides Extended Backus–Naur Form syntax highlighting.
Grammar is taken from Railroad Diagram Generator
Features
- Provides syntax highlighting for files with extension '.ebnf'
- Colours maybe customized by adopting
settings.json
Screenshot above was taken with using the following theme customization:
{
"editor.tokenColorCustomizations": {
"textMateRules": [
{
"scope": "entity.name.declaration.ebnf",
"settings": {
"foreground": "#ff9404",
"fontStyle": "bold"
}
},
{
"scope": "entity.name.ebnf",
"settings": {
"foreground": "#4ea5b6",
}
},
{
"scope": "keyword.operator.new.ebnf",
"settings": {
"foreground": "#3875d7",
}
},
{
"scope": "keyword.operator.alternative.ebnf",
"settings": {
"foreground": "#b4e4fd",
}
},
{
"scope": "keyword.operator.quantifier.ebnf",
"settings": {
"foreground": "#c0a0f3",
"fontStyle": "bold"
}
},
{
"scope": "keyword.operator.difference.ebnf",
"settings": {
"foreground": "#7cbdf1",
}
},
]
}
}
- Provides diagnostics
- Used but undefined tokens
Requirements
- It is required to split every rule with blank line
- requires HyperScopes extension installed
Extension Settings
Known Issues
- Grammar doesn't recognize links
- Used non standard token classes
- HyperScopes extension works not perfectly and provides not reliable output (hscopes/issues/2). Diagnostics features may require another approach for implementation.
Release Notes
0.0.4
- include guard support (
ifndef define endif)
- tests
0.0.3
- support for preprocessor directive
#include
0.0.2
- experimental diagnostics implementation
0.0.1
- initial release with more or less stable tokenization
Links which were useful during development
