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Add Spec Identifier Syntax to expressions.md and subchapters #1591
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Add Spec Identifier Syntax to expressions.md and subchapters #1591
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…xpr, tuple-expr, and underscore-expr
@@ -169,29 +197,46 @@ Explicitly, the assignee expressions are: | |||
fields). | |||
- [Unit structs][_StructExpression_]. | |||
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r[expr.place-value.parentehesis] |
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r[expr.place-value.parentehesis] | |
r[expr.place-value.parenthesis] |
Unlike other expressions, parenthesized expressions are both [place expressions and value expressions][place]. | ||
When the enclosed operand is a place expression, it is a place expression and when the enclosed operand is a value expression, it is a value expression. | ||
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r[expr.paren.overridew-precedence] |
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r[expr.paren.overridew-precedence] | |
r[expr.paren.override-precedence] |
When looking up a method call, the receiver may be automatically dereferenced or borrowed in order to call a method. | ||
This requires a more complex lookup process than for other functions, since there may be a number of possible methods to call. | ||
The following procedure is used: | ||
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r[expr.method.candidate-recievers] |
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r[expr.method.candidate-recievers] | |
r[expr.method.candidate-receivers] |
The first step is to build a list of candidate receiver types. | ||
Obtain these by repeatedly [dereferencing][dereference] the receiver expression's type, adding each type encountered to the list, then finally attempting an [unsized coercion] at the end, and adding the result type if that is successful. | ||
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r[expr.method.candidate-recievers-refs] |
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r[expr.method.candidate-recievers-refs] | |
r[expr.method.candidate-receivers-refs] |
@@ -58,11 +69,14 @@ Then, for each candidate type `T`, search for a [visible] method with a receiver | |||
> } | |||
> ``` | |||
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r[expr.method.ambiguious-target] |
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r[expr.method.ambiguious-target] | |
r[expr.method.ambiguous-target] |
This process does not take into account the mutability or lifetime of the receiver, or whether a method is `unsafe`. | ||
Once a method is looked up, if it can't be called for one (or more) of those reasons, the result is a compiler error. | ||
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r[expr.method.ambiguious-search] |
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r[expr.method.ambiguious-search] | |
r[expr.method.ambiguous-search] |
This adds identifier syntax to
expressions.md
and all subchapters.