ChainSegment (fantomas)

ChainSegment Type

Namespace: Fantomas.Core
Assembly: Fantomas.Core.dll
Parent Module: SyntaxOak
Base Type: obj

A single dot-prefixed step in a member-access or call chain. Every step is reached through a .; the dot is an explicit so that trivia (comments, blank lines) attached to it are preserved during formatting. A segment is always intermediate: the final call of a chain is the ExprChain.Terminal, never a segment here. That is why DotApplication (an intermediate call) is distinct from DotMember (plain access) — the distinction the layout cares about (navigation vs. action) is then visible in the shape of the data itself.

Union cases

Union case	Description
`DotApplication(dot, expr, call)` Full Usage: `DotApplication(dot, expr, call)` Parameters: dot : `SingleTextNode` expr : `Expr` call : `ChainCall`	.Foo(x) — intermediate call — always tight, never a space before ( .Foo() — intermediate unit call — always tight e.g. the `.Foo(x)` in `a.Foo(x).Bar`. The terminal call of a chain is not a segment. dot : `SingleTextNode` expr : `Expr` call : `ChainCall`
`DotIndex(dot, indexExpr)` Full Usage: `DotIndex(dot, indexExpr)` Parameters: dot : `SingleTextNode` indexExpr : `Expr`	Old dot-bracket index syntax: arr.[i]. DotIndex is a separate case rather than DotMember because the [ and ] brackets are not part of indexExpr in the AST — genExpr indexExpr produces only the content (e.g. 0), not [0]. No existing Expr type naturally renders bracketed index content, so the printer must add [ and ] explicitly. From a layout perspective DotIndex is identical to DotMember — both are navigation segments with no call. dot : `SingleTextNode` indexExpr : `Expr`
`DotMember(dot, expr)` Full Usage: `DotMember(dot, expr)` Parameters: dot : `SingleTextNode` expr : `Expr`	.Foo — plain property access (navigation) .Items[0] — expr = IndexWithoutDot(Items, [0]), no dedicated case needed dot : `SingleTextNode` expr : `Expr`

Instance members

Instance member	Description
`this.IsDotApplication` Full Usage: `this.IsDotApplication` Returns: `bool`	Returns: `bool`
`this.IsDotIndex` Full Usage: `this.IsDotIndex` Returns: `bool`	Returns: `bool`
`this.IsDotMember` Full Usage: `this.IsDotMember` Returns: `bool`	Returns: `bool`