forked from extern/nushell
c6fe58467b
* Change alias shape inference to proposal of RFC#4 * Remove commented code * Fix typo * Change comment to be more informative * Make match statement to lookup in table * Remove resolved question https://github.com/nushell/nushell/pull/2685#discussion_r509832054 * Pick ...or_insert_dependency functions into pieces Previously there was get_shape_of_expr_or_insert dependency, now there is get_shape_of_expr and get_shape_of_expr_or_insert_dependency 2 new functions have been added: get_result_shape_of_math_expr and get_result_shape_of_math_expr_or_insert_dependency * Remove flattening of deep binary expressions Previously deep binary expressions have been flattened through the insertion of fake vars. This logic was quite complicated. Now if a variable depends on the result shape of a binary expression and the result shape can't be computed, the variable simply depends on the whole binary. * Change Expression::Variable(Variable::It(...)) to Expression::Variable(...) * Simplify get_result_shapes_in_math_expr * Simplify infer_shapes_in_binary_expr * Clarify comment * Clarify comment * Fix clippy lint * Move check for real var into checked_insert * Remove comment * Rename var
58 lines
1.9 KiB
Rust
58 lines
1.9 KiB
Rust
use nu_source::{b, DebugDocBuilder, PrettyDebug};
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use serde::{Deserialize, Serialize};
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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, Copy, Clone, Serialize, Deserialize, PartialEq, Eq, Hash)]
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pub enum 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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ColumnPath,
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/// A dotted path to navigate the table (including variable)
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FullColumnPath,
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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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Path,
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/// A glob pattern is allowed, eg `foo*`
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Pattern,
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/// A block is allowed, eg `{start this thing}`
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Block,
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/// A table is allowed, eg `[first second]`
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Table,
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/// A unit value is allowed, eg `10kb`
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Unit,
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/// An operator
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Operator,
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/// A math expression, eg `foo > 1`
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Math,
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}
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impl PrettyDebug for SyntaxShape {
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/// Prepare SyntaxShape for pretty-printing
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fn pretty(&self) -> DebugDocBuilder {
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b::kind(match self {
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SyntaxShape::Any => "any",
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SyntaxShape::String => "string",
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SyntaxShape::FullColumnPath => "column path (with variable)",
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SyntaxShape::ColumnPath => "column path",
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SyntaxShape::Number => "number",
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SyntaxShape::Range => "range",
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SyntaxShape::Int => "integer",
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SyntaxShape::Path => "file path",
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SyntaxShape::Pattern => "pattern",
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SyntaxShape::Block => "block",
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SyntaxShape::Table => "table",
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SyntaxShape::Unit => "unit",
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SyntaxShape::Operator => "operator",
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SyntaxShape::Math => "condition",
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})
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}
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}
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