mirror of
https://github.com/nushell/nushell
synced 2025-01-10 04:09:09 +00:00
112 lines
3.4 KiB
Rust
112 lines
3.4 KiB
Rust
use crate::Type;
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/// The syntactic shapes that values must match to be passed into a command. You can think of this as the type-checking that occurs when you call a function.
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#[derive(Debug, Clone, PartialEq, Eq)]
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pub enum SyntaxShape {
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/// A specific match to a word or symbol
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Keyword(Vec<u8>, Box<SyntaxShape>),
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/// Any syntactic form is allowed
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Any,
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/// Strings and string-like bare words are allowed
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String,
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/// A dotted path to navigate the table
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CellPath,
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/// A dotted path to navigate the table (including variable)
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FullCellPath,
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/// Only a numeric (integer or decimal) value is allowed
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Number,
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/// A range is allowed (eg, `1..3`)
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Range,
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/// Only an integer value is allowed
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Int,
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/// A filepath is allowed
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FilePath,
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/// A glob pattern is allowed, eg `foo*`
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GlobPattern,
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/// A module path pattern used for imports
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ImportPattern,
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/// A block is allowed, eg `{start this thing}`
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Block(Option<Vec<SyntaxShape>>),
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/// A table is allowed, eg `[[first, second]; [1, 2]]`
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Table,
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/// A table is allowed, eg `[first second]`
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List(Box<SyntaxShape>),
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/// A filesize value is allowed, eg `10kb`
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Filesize,
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/// A duration value is allowed, eg `19day`
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Duration,
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/// An operator
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Operator,
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/// A math expression which expands shorthand forms on the lefthand side, eg `foo > 1`
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/// The shorthand allows us to more easily reach columns inside of the row being passed in
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RowCondition,
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/// A general math expression, eg `1 + 2`
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MathExpression,
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/// A variable name
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Variable,
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/// A variable with optional type, `x` or `x: int`
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VarWithOptType,
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/// A signature for a definition, `[x:int, --foo]`
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Signature,
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/// A general expression, eg `1 + 2` or `foo --bar`
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Expression,
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/// A custom shape with custom completion logic
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Custom(Box<SyntaxShape>, String),
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}
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impl SyntaxShape {
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pub fn to_type(&self) -> Type {
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match self {
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SyntaxShape::Any => Type::Unknown,
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SyntaxShape::Block(_) => Type::Block,
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SyntaxShape::CellPath => Type::Unknown,
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SyntaxShape::Custom(custom, _) => custom.to_type(),
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SyntaxShape::Duration => Type::Duration,
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SyntaxShape::Expression => Type::Unknown,
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SyntaxShape::FilePath => Type::FilePath,
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SyntaxShape::Filesize => Type::Filesize,
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SyntaxShape::FullCellPath => Type::Unknown,
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SyntaxShape::GlobPattern => Type::String,
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SyntaxShape::ImportPattern => Type::Unknown,
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SyntaxShape::Int => Type::Int,
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SyntaxShape::List(x) => {
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let contents = x.to_type();
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Type::List(Box::new(contents))
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}
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SyntaxShape::Keyword(_, expr) => expr.to_type(),
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SyntaxShape::MathExpression => Type::Unknown,
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SyntaxShape::Number => Type::Number,
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SyntaxShape::Operator => Type::Unknown,
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SyntaxShape::Range => Type::Unknown,
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SyntaxShape::RowCondition => Type::Bool,
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SyntaxShape::Signature => Type::Unknown,
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SyntaxShape::String => Type::String,
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SyntaxShape::Table => Type::List(Box::new(Type::Unknown)), // FIXME
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SyntaxShape::VarWithOptType => Type::Unknown,
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SyntaxShape::Variable => Type::Unknown,
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}
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}
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}
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