80487ddcad
This code does not belong in libstd, and rather belongs in a dedicated crate. In the future, the syntax::ext::format module should move to the fmt_macros crate (hence the name of the crate), but for now the fmt_macros crate will only contain the format string parser. The entire fmt_macros crate is marked #[experimental] because it is not meant for general consumption, only the format!() interface is officially supported, not the internals. This is a breaking change for anyone using the internals of std::fmt::parse. Some of the flags have moved to std::fmt::rt, while the actual parsing support has all moved to the fmt_macros library. [breaking-change]
102 lines
2.4 KiB
Rust
102 lines
2.4 KiB
Rust
// Copyright 2013 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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//! This is an internal module used by the ifmt! runtime. These structures are
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//! emitted to static arrays to precompile format strings ahead of time.
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//!
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//! These definitions are similar to their `ct` equivalents, but differ in that
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//! these can be statically allocated and are slightly optimized for the runtime
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#![allow(missing_doc)]
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#![doc(hidden)]
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use option::Option;
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#[cfg(stage0)]
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pub use fmt::parse::{Alignment, AlignLeft, AlignRight, AlignUnknown};
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#[cfg(stage0)]
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pub use fmt::parse::{PluralKeyword, Zero, One, Two, Few, Many};
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#[cfg(stage0)]
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pub use fmt::parse::{Flag, FlagSignPlus, FlagSignMinus, FlagSignAwareZeroPad};
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#[cfg(stage0)]
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pub use fmt::parse::{FlagAlternate};
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pub enum Piece<'a> {
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String(&'a str),
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// FIXME(#8259): this shouldn't require the unit-value here
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CurrentArgument(()),
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Argument(Argument<'a>),
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}
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pub struct Argument<'a> {
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pub position: Position,
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pub format: FormatSpec,
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pub method: Option<&'a Method<'a>>
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}
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pub struct FormatSpec {
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pub fill: char,
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pub align: Alignment,
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pub flags: uint,
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pub precision: Count,
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pub width: Count,
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}
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#[cfg(not(stage0))]
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#[deriving(Eq)]
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pub enum Alignment {
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AlignLeft,
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AlignRight,
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AlignUnknown,
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}
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pub enum Count {
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CountIs(uint), CountIsParam(uint), CountIsNextParam, CountImplied,
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}
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pub enum Position {
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ArgumentNext, ArgumentIs(uint)
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}
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#[cfg(not(stage0))]
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pub enum Flag {
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FlagSignPlus,
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FlagSignMinus,
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FlagAlternate,
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FlagSignAwareZeroPad,
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}
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pub enum Method<'a> {
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Plural(Option<uint>, &'a [PluralArm<'a>], &'a [Piece<'a>]),
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Select(&'a [SelectArm<'a>], &'a [Piece<'a>]),
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}
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pub enum PluralSelector {
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Keyword(PluralKeyword),
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Literal(uint),
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}
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pub enum PluralKeyword {
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Zero,
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One,
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Two,
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Few,
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Many,
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}
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pub struct PluralArm<'a> {
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pub selector: PluralSelector,
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pub result: &'a [Piece<'a>],
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}
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pub struct SelectArm<'a> {
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pub selector: &'a str,
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pub result: &'a [Piece<'a>],
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}
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